• We investigated the genetic architecture underlying differentiation in fitness-related traits between two pairs of populations of the seed beetle Callosobruchus maculatus (Coleoptera: Bruchidae). (bioone.org)
  • C. P.-C. Suh and J. K. Westbrook "Failure of Pheromone Traps in Detecting Incipient Populations of Boll Weevils (Coleoptera: Curculiondae): Investigation of Two Potential Contributing Factors," Journal of Entomological Science 49(2), 211-214, (1 April 2014). (bioone.org)
  • The cotton boll weevil, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), is a key cotton crop pest in Brazil. (scielo.br)
  • However, the functions and components of these exudates are largely unknown in the red palm weevil, Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae). (frontiersin.org)
  • The invasive red palm weevil (RPW), Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae), is considered to be one of the most devastating pests in a number of palm tree species. (frontiersin.org)
  • Does White Clover (Trifolium repens) Abundance in Temperate Pastures Determine Sitona obsoletus (Coleoptera: Curculionidae) Larval Populations? (frontiersin.org)
  • The root-galling weevil, Ceutorhynchus assimilis Paykull (Coleoptera: Curculionidae), has been selected as a candidate to control hoary cress, Lepidium draba L. (Brassicaceae), a highly invasive weed in western North America. (usda.gov)
  • Leaf-rolling weevils (Coleoptera: Rhynchitidae, Attelabidae) of the world fauna. (ika.ie)
  • Early in the 1980s, a scientist named Terry Erwin decided to count the number of Coleoptera species - the insect order containing beetles and weevils - in the rainforest canopy. (asiasentinel.com)
  • To determine if host plant abundance determined the size of clover root weevil (CRW) Sitona obsoletus larval populations, a study was conducted over 4 years in plots sown in ryegrass ( Lolium perenne ) (cv. (frontiersin.org)
  • A model for population growth and development of the maize weevil, which is integrated with a bin-cooling model, was used to predict temperature, relative humidity, number of larvae, and number of adults in unaerated and aerated corn during 1 yr of storage. (uky.edu)
  • However, predicted adult populations in unaerated corn stored in all zones would begin to increase in August and September of the following year when larvae already present in the kernels complete development. (uky.edu)
  • Predicted populations of larvae in aerated corn stored in all but the southernmost zones would decline during autumn because of the rapid cooling provided by aeration, and in each zone the total number at the end of the calendar year would be about two orders of magnitude lower than in unaerated corn. (uky.edu)
  • Advancing the storage date by 1 or 2 wk would have little effect on predicted populations of larvae or adults in unaerated or aerated corn stored in the three northernmost zones. (uky.edu)
  • Surveys of O. vitiosa populations and rearing of field-collected individuals resulted in no instances of parasitoids or pathogens exploiting weevil eggs or larvae. (usda.gov)
  • Figwort weevil larvae and pupae ( Cionus sp. (rhs.org.uk)
  • Weevil larvae are whitish in color and can grow up to five inches in length. (ucr.edu)
  • Weevil larvae pupate inside fibrous cocoons that may be found in the infested crown region or in tunnels weevil larvae drill into the base of palm fronds. (ucr.edu)
  • Infestations of weevil larvae in the crown of the palm can result in death if the infestation is not treated with insecticides. (ucr.edu)
  • Mature larvae of this seed feeding weevil fall into the tube attached to the gauze bag and can easily be collected (Credit: CABI). (cabi.org)
  • Mature weevil larvae leave the flower heads and crawl into the soil to spend the winter. (osu.edu)
  • This will prevent weevil larvae from completing their development thus reducing the weevil population for next season. (osu.edu)
  • Billbugs are grass-feeding weevils whose larvae damage turf. (purdue.edu)
  • Because the larvae of billbug species look the same, Rodriguez-Soto is using DNA barcoding to tell species apart and track their populations. (purdue.edu)
  • Heterorhabditis bacteriophora harmless to the ornamental crops, humans, the environment and other beneficial insects, these nematodes actively seek out grubs, Japanese beetles and vine weevil larvae by swimming in the thin film of water on soil particles. (buglogical.com)
  • However, the host-specific weevils look the same as those from populations which are not specific to hoary cress and also attack some crop species. (usda.gov)
  • This weevil originally had been described as being oligophagous, attacking various mustard species, including some crops. (usda.gov)
  • We therefore explored the phylogeographic structure of the weevil's populations by sampling five different host plant species including L. draba in 12 European countries. (usda.gov)
  • Weevils are a group of several families of beetles in the superfamily Curculionoidea, there are more than 500 species in the UK. (rhs.org.uk)
  • Figwort weevils are several closely related Cionus and Cleopus species of beetles. (rhs.org.uk)
  • Several species of weevil ( Cionus and Cleopus species) partly eat leaves which can lead to foliage drying up, particularly at the shoot tips. (rhs.org.uk)
  • Corin Pratt, lead author and Invasive Species Management Researcher at CABI, said, "The unintentional introduction of the weevil S. rufinasus to Great Britain is estimated to have resulted in millions of pounds of savings annually in management costs for A. filiculoides . (eurasiareview.com)
  • What Species of Palms Does the Weevil Attack? (ucr.edu)
  • In San Diego County, the weevil has shown a very strong preference for attacking CIDP to the almost complete exclusion of other palm species at this time. (ucr.edu)
  • This is the most common way that pea aphids become a problem and occurs because the insecticides that produce effective alfalfa weevil control are also highly toxic to many species of beneficial insects. (colostate.edu)
  • A sibling species, the root-mining weevil Mogulones crucifer was released in Canada in 1997 and is showing impressive success in reducing houndstongue populations to benign. (cabi.org)
  • The main host of all species of sweet potato weevil is sweet potato. (infonet-biovision.org)
  • Researchers have studied insect populations in Australia and identified many species that feed on melaleuca. (ufl.edu)
  • But there is a species of weevil on Shadow and Mirror Lakes that is eating Eurasian water-milfoil, an invasive aquatic weed that forms dense mats that tangles up boat propellers, kayak paddles and swimmers alike. (waupacanow.com)
  • Combining species and population-genetic approaches, the research team demonstrated that weevils colonized the Antarctic islands from Africa at least 50 million years ago and repeatedly dispersed among islands - despite being flightless - likely using seabirds to travel long distances over open ocean, and against prevailing ocean currents. (memphis.edu)
  • As the climate cooled over the last ~20 million years, weevil diversification accelerated, resulting in an unusual diversity of living weevil species for such an inhospitable region - more than 30 species of Ectemnorhinini are known from the Antarctic. (memphis.edu)
  • While weevils are typically plant-feeding, some species of Ectemnorhinini evolved the ability to feed on "lower" (non-seed bearing) plants, which dominate the polar habitats that now prevail in the region. (memphis.edu)
  • One unusual weevil species lives only in the marine littoral zone and is currently undergoing further speciation. (memphis.edu)
  • Yet other species retained the more common weevil habit of feeding on flowering plants (angiosperms). (memphis.edu)
  • Many insect species are undergoing rapid population decline in recent decades due to anthropogenic changes to natural landscapes and climate. (lu.se)
  • This was interpreted as being beneficial for the insect, in that population establishment in a new habitat could be initiated by dispersing previously mated females without participation of the male. (who.int)
  • The weevil is a well-documented insect pest of cultivated and wild sunflowers ( Helianthu s spp. (osu.edu)
  • A. The adult female weevil is a beetle-like insect that emerges from the ground in early August each year. (artesianews.com)
  • Tropical Insect Populations Crashing? (asiasentinel.com)
  • This pine has two serious enemies: white pine blister rust, a serious parasite, and an insect, the white pine weevil. (espacepourlavie.ca)
  • Inundative releases are necessary to reduce insect populations below economic thresholds. (buglogical.com)
  • Controlled mating experiments in the white pine weevil (Pissodes strobi [Peck]) indicated that female weevils either stored sperm or fertilized eggs from one season to the next, and were able to colonize Sitka spruce (Picea sitchensis [Bong. (who.int)
  • Boll weevils begin to die at temperatures at or below −5 °C (23 °F). Research at the University of Missouri indicates they cannot survive more than an hour at −15 °C (5 °F). The insulation offered by leaf litter, crop residues, and snow may enable the beetle to survive when air temperatures drop to these levels. (wikipedia.org)
  • Each parcel had one emergence cage, installed between two cotton rows per irrigation system, with 37 cotton squares with opened oviposition punctures and yellowish bracts, to capture adult cotton boll weevils. (scielo.br)
  • The average number of boll weevils that emerged from the cotton squares and the causes of mortality at different development stages were determined per treatment. (scielo.br)
  • This is because the cotton squares fallen on the drier and hotter soil between the rows of drip-irrigated cotton dehydrates causing the boll weevils to die. (scielo.br)
  • The ants munch on boll weevils, caterpillars and sugarcane borers. (sott.net)
  • Aphids become secondary pests of alfalfa following the use of broad spectrum insecticides for alfalfa weevil control during the first hay crop. (colostate.edu)
  • A new publication released by the University of Wyoming Extension assesses insecticide resistance in alfalfa weevil populations in Wyoming, Montana, and Utah. (k99.com)
  • The South American palm weevil (SAPW), Rhynchophorus palmarum , is a non-native pest of palms that has established populations in San Diego County in California. (ucr.edu)
  • Historical weather data were used to divide the northern United States into five climatic zones based on the number of hours below 15.6°C (60°F), which is the approximate lower developmental threshold for the maize weevil, Sitophilus zeamais Motschulsky, during a calendar year. (uky.edu)
  • Results of these simulation studies show that aeration alone without the use of insecticides should provide adequate management of maize weevil in corn stored in the northern United States. (uky.edu)
  • Use of NeemPro®, a neem product to control maize weevil Sitophilus zeamais (Motsch. (biomedcentral.com)
  • The aim of this study was to evaluate the activity of NeemPro ® against the maize weevil on three maize varieties in the laboratory and the effect of the insecticide on seed germination. (biomedcentral.com)
  • The objective of this study was to evaluate the efficacy of NeemPro ® against the maize weevil on three maize varieties in the laboratory. (biomedcentral.com)
  • The boll weevil (Anthonomus grandis) is a beetle that feeds on cotton buds and flowers. (wikipedia.org)
  • In the 1980s, entomologists at Texas A&M University pointed to the spread of another invasive pest, the red imported fire ant, as a factor in the weevils' population decline in some areas. (wikipedia.org)
  • This is important because it can reduce its population density of the pest and, consequently, the number of applications of chemical insecticides for its control. (scielo.br)
  • Use this combination to control a wide variety of Weevil and boring pest populations. (arbico-organics.com)
  • The headclipping weevil has reared its ugly snout in recent years in Ohio to become a serious pest of coneflowers in landscapes and naturalized areas. (osu.edu)
  • The seed-feeding weevil Mogulones borraginis has been recommended for release in North America to help control the invasive noxious weed houndstongue, based on a petition submitted by CABI scientists in collaboration with Prof. Mark Schwarzländer (University of Idaho) and Rachel Winston (MIA Consulting). (cabi.org)
  • Adult weevils overwinter in well-drained areas in or near cotton fields, and farms after diapause. (wikipedia.org)
  • Adult weevils are large, black in color, and about 1.5 inches in length. (ucr.edu)
  • The adult weevils have wings and are strong fliers. (ucr.edu)
  • Adult weevils emerge from cocoons when pupation is complete. (ucr.edu)
  • Adult weevils feed on leaves, the underground storage roots (tubers) and the vines of sweet potatoes. (infonet-biovision.org)
  • They prefer to feed on storage roots, but at the beginning of the growing season, when the plants have not yet produced storage roots, the adult weevils live on the stem and leaves . (infonet-biovision.org)
  • Adult weevils will feed on milfoil leaves and stem tissue. (waupacanow.com)
  • Adult weevils emerge from the soil from August through September, usually coming out after significant rain. (ncsu.edu)
  • Weevils overwinter on shore and hibernate under duff material in the first 35 feet of shoreline buffer. (waupacanow.com)
  • The alternate common name "Silphium weevil" reflects the weevil's appetite for compass plant ( S. laciniatum ), prairie dock (S. terebinthinaceum ), and cup plant ( S. perfoliatum ). (osu.edu)
  • Larval populations in unaerated corn were predicted to increase during autumn, although numbers would decrease as the climatic zones progressed northward. (uky.edu)
  • There was a significant decline in larval populations between 2012 and 2013, but spring populations were relatively uniform thereafter. (frontiersin.org)
  • Analysis relating spring (October) larval populations to % white clover measured in each plot in autumn (April) found the 2012 larval population to be statistically significantly larger in the ryegrass 6 kg/ha plots than 30 kg/ha plots. (frontiersin.org)
  • Thereafter, sowing rate had no significant effect on larval populations. (frontiersin.org)
  • From 2013 to 2015, spring larval populations had a negative relationship with the previous autumn % white clover with the relationship highly significant for the 2014 data. (frontiersin.org)
  • When CRW larval populations in spring 2013 to 2015 were predicted from the 2013 to 2015 autumn % white clover, respectively, based on their positive relationship in 2012, the predicted densities were substantially larger than those observed. (frontiersin.org)
  • Conversely, when 2015 spring larval data and % clover was regressed against 2012-2014 larval populations, observed densities tended to be higher than predicted, but the numbers came closer to predicted for the 2013 and 2014 populations. (frontiersin.org)
  • While many control methods have been investigated since the boll weevil entered the United States, insecticides have always remained the main control methods. (wikipedia.org)
  • To avoid these situations, apply insecticides only when weevil populations reach action thresholds. (colostate.edu)
  • In this way, the use of this trap for monitoring banana weevil in plantations of plantains in the southern region of Bahia is recommended. (academicjournals.org)
  • Less than two decades later, however, Uniontown began to lose population as more people abandoned plantations, largely because of the boll weevil 's ruinous effect on the cotton crop. (encyclopediaofalabama.org)
  • A new CABI-led study suggests that a tiny weevil ( Stenopelmus rufinasus ) has huge benefits in saving Great Britain up to £16.8m in annual management costs of the invasive aquatic fern Azolla filiculoides . (eurasiareview.com)
  • Fortunately, rearing is relatively easy, and so CABI was able to send hundreds of M. borraginis to a quarantine laboratory at the University of Idaho led by Prof Mark Schwarzländer, to conduct research on the chemical ecology of the weevil affirming its environmental safety. (cabi.org)
  • In the meantime, we are maintaining colonies of the weevil at CABI and in quarantine in the USA, so that we will be ready to release it when all the necessary checks and approvals have been done and granted. (cabi.org)
  • Beneficial insects can hold aphid populations below action thresholds in alfalfa. (colostate.edu)
  • In this study we ask if O. vitiosa has acquired natural enemies in Florida, how these enemies circumvent the larvae's protective terpenoid laden exudate, and what influence one of the most common natural enemies has on O. vitiosa population densities? (usda.gov)
  • Populations of the weevil increased rapidly and became widely distributed throughout much of the invasive tree's adventive distribution. (usda.gov)
  • This weevil biotype will be evaluated to determine if it is safe to use for biocontrol of hoary cress. (usda.gov)
  • I am currently working with a number of colleagues on genetic, demographic, and pollination studies on a threatened thistle ( Cirsium pitcheri ) that is being negatively impacted by a biocontrol weevil. (chicagobotanic.org)
  • We conclude that the application of water directly to the root zone of the plants in a targeted manner, using the drip irrigation system, can cause high mortality of the cotton boll weevil immature stages inside cotton squares fallen on the ground. (scielo.br)
  • Eddy County Extension Agent Woods Houghton is sharing answers to commonly-asked questions he has received regarding the ongoing quarantine of pecan trees in Southeast New Mexico due to pecan weevil. (artesianews.com)
  • A. The current emergency pecan weevil quarantine requires pecan buyers and accumulators to obtain specific information from individuals selling their pecans. (artesianews.com)
  • The boll weevil lays its eggs inside buds and ripening bolls (fruits) of the cotton plants. (wikipedia.org)
  • Weevils feed on the storage roots and lay eggs just below the surface of the root. (infonet-biovision.org)
  • Other avenues of control that have been explored include weevil-resistant strains of cotton, the parasitoid wasp Catolaccus grandis, the fungus Beauveria bassiana, and the Chilo iridescent virus. (wikipedia.org)
  • Where possible accept these weevils as part of the biodiversity a healthy garden can support or tolerate their presence. (rhs.org.uk)
  • According to McKenna "This work involved the most comprehensive analyses of DNA data to uncover the geographic and evolutionary origins of a group of Antarctic insects and is notable for having illuminated the remarkable antiquity of Antarctic weevil biodiversity, its geographic origins, and its apparent resilience to climate cooling over millennia. (memphis.edu)
  • Palms in the very early stages of weevil attack are hard to diagnose as infested because weevils are hidden in the crown and can be very hard to find. (ucr.edu)
  • The life cycle of the pecan weevil has four stages. (ncsu.edu)
  • Populations have been markedly reduced by intense forestry operations. (espacepourlavie.ca)
  • A. Buyers in non-weevil areas are also asking for ID, and if you are coming from an infested area, they will not buy your pecans. (artesianews.com)
  • One of the most devastating insects on pecans is the pecan weevil. (ncsu.edu)
  • If you have ever picked up pecans that had a hole in the top of the shell and were empty or found grubs inside pecans when you cracked them open, then you have experienced pecan weevils. (ncsu.edu)
  • Later in the season, when mature nuts begin to fall, pick up pecans daily and discard infested nuts away from the tree to lower future weevil populations. (ncsu.edu)
  • Geographical Distribution of the Sweet potato weevils in Africa (red marked). (infonet-biovision.org)
  • The African sweet potato weevil ( Cylas puncticollis ) is one of the most important pests of sweet potato in tropical Africa, notably Uganda, Rwanda, Kenya and Cameroon. (infonet-biovision.org)
  • 1991) reported on serious weevil attacks on sweet potato nurseries in Ethiopia. (infonet-biovision.org)
  • Damage by weevils can be recognised by the holes in the vines or the tunnels in the tuber when you pull them up from the soil. (infonet-biovision.org)
  • With an overall population of 27,691,018 as of 2020, Madagascar has an established agricultural industry thanks to its diverse climate and fertile soil. (travellersworldwide.com)
  • Reduced populations of beneficial insects, combined with warm temperatures allow aphid populations to explode in a short period of time. (colostate.edu)
  • However, research published by an international team of researchers in the journal Proceedings of the National Academy of Sciences, U.S.A. , shows that these same Earth system processes are key drivers in diversification of one of the world's most geographically-isolated groups of insects - Ectemnorhinini weevils. (memphis.edu)
  • Since the boll weevil entered the United States, it has cost U.S. cotton producers about $13 billion, and in recent times about $300 million per year. (wikipedia.org)
  • Genetically engineered Bt cotton is not protected from the boll weevil. (wikipedia.org)
  • The objective of this research was to evaluate the mortality of the cotton boll weevil in drip and sprinkler irrigated cotton crops. (scielo.br)
  • With the boll weevil infestation of the early 1900s, cotton yields in the area began dropping, and when the depression set in, the town hit bottom. (greenvillelibrary.org)
  • Pecan weevils can be controlled by spraying liquid applications of carbaryl (commonly sold as Sevin) on the ground underneath trees out to the drip line, as well as up the trunks of pecan trees as far as you can reach, beginning in mid-August and continuing every seven days through mid to late September. (ncsu.edu)
  • To minimize the number of sprays needed, pecan tree owners can monitor weevil populations by tying burlap cloth around the trunks of pecan trees in layers. (ncsu.edu)
  • U.S. Food Administration, Educational div., Advertising section, 1918-1919) Eradication map (USDA, 2006) Although it was possible to control the boll weevil, the necessary insecticide was costly. (wikipedia.org)
  • This includes the value of additional augmentative releases of the weevil made since the mid-2000s, compared with the expected costs of control in the absence of S. rufinasus . (eurasiareview.com)
  • Biological control is using a pest's natural enemies to lower its population. (ufl.edu)
  • It's impossible for a homeowner to spray insecticide over an entire tree in most cases, but there are some strategies that might help control the weevils. (artesianews.com)
  • It prefers to feed on that so generations will slowly shift to feeding on Eurasian which can keep it at control levels if there is enough weevil activity on the lake," said Thorstenson. (waupacanow.com)
  • This control method will greatly reduce the number of nuts lost to pecan weevil. (ncsu.edu)
  • The best method for controlling this weevil is to remove and destroy the dangling flower heads as well as heads that have dropped to the ground. (osu.edu)
  • Analysis of weevil populations from various sites in Europe indicate that host-specific populations occur from northern Spain to northern Italy. (usda.gov)
  • The general population is not likely to be exposed to large amounts of malathion. (cdc.gov)
  • NeemPro ® relatively killed all the exposed weevils at 6 g/kg within 14 days with LC 50 of 0.04, 0.07 and 0.11 g/kg in CLH103, CMS8501 and SHABA varieties, respectively, as observed in Malagrain. (biomedcentral.com)
  • Undersized bluegills and sunfish are the biggest predators of milfoil weevils so she did a food web experiment on Lake Joanis in the Schmeeckle Reserve in Stevens Point. (waupacanow.com)
  • DDT was initially extremely effective, but U.S. weevil populations developed resistance by the mid-1950s. (wikipedia.org)
  • They found that in the intervening decades' populations had collapsed. (asiasentinel.com)
  • While kayaking, fishing or swimming, the easiest way to identify Eurasian water-milfoil being eaten by weevils is to look for darkened spaghetti-like stems. (waupacanow.com)
  • In fact, I have found this weevil attacking common ragweed ( Ambrosia artemisiifolia ) which provides a clear demonstration this weed belongs to the aster family. (osu.edu)
  • This provided a range of % white clover content to investigate CRW population establishment and impacts on white clover survival. (frontiersin.org)
  • The scientists say that the impacts of naturalised S. rufinasus populations on A. filiculoides alone could be expected to reduce management costs to £800,000 to £1.6m a year. (eurasiareview.com)
  • Except for corn stored in the southernmost zone, adult populations were not predicted to increase during autumn in unaerated corn because temperatures would not be warm enough to complete a generation. (uky.edu)
  • Unexpectedly, Ectemnorhinini weevils diversified in synchrony with many other Antarctic organisms, including penguins, and certain mollusks and marine fishes. (memphis.edu)
  • However, they estimate A. filiculoides management costs to be lower still due to additional augmentative releases of the weevil that take place each summer, resulting in annual management costs of £31,500 to £45,800. (eurasiareview.com)