• root weevil
  • To minimize root weevil damage in strawberry fields, fall ploughing will help protect the spring planting. (gov.mb.ca)
  • Another wasp Microctonus aethiopoides had previously been introduced in order to control the clover root weevil (Sitona lepidus), and it has also been found to parasitize L. bonariensis. (wikipedia.org)
  • Decline of spotted knapweed density at two sites in western Montana with large populations of the introduced root weevil, Cyphocleonus achates (Fahraeus). (wikipedia.org)
  • boll weevils
  • 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)
  • citation needed] The program has been successful in eradicating boll weevils from all cotton-growing states with the exception of Texas, and most of this state is free of boll weevils. (wikipedia.org)
  • The mine was established in the 1920s by Escondido rancher, rodeo cowboy, and actor Frank Hopkins, due to the demand for white arsenic, a key ingredient in pesticides that attacked infesting boll weevils. (wikipedia.org)
  • Severe weather conditions, complicated by an infestation of boll weevils caused a steady decline in the population. (wikipedia.org)
  • vulneratus
  • due to the taxonomic confusion, it is unclear whether R. vulneratus and R. ferrugineus favor different hosts, though nearly all of the invasive populations known are of ferrugineus, so one of the only confirmed hosts for vulneratus outside of Asia is the Canary Island date palm, Phoenix canariensis. (wikipedia.org)
  • Alfalfa
  • Though originally from Asia, the alfalfa weevil was introduced from Europe into the United States in the early 20th century and is now present in all 48 mainland states. (britannica.com)
  • In Europe and especially in the United States, considerable crop damage is caused by generations of alfalfa weevils coming to adulthood in June and August . (britannica.com)
  • Florida
  • Consult UF/IFAS recommendations for currently labeled insecticides for sweet potato weevil control in Florida. (growingproduce.com)
  • Every native plant in Florida has evolved with specific population regulating factors that include environmental restraints such as water levels, as well as natural enemies including herbivores and pathogens. (ufl.edu)
  • When a non-native plant is introduced into a Florida habitat, it may have a competitive advantage over native plant populations because the natural factors that regulated the introduced plant in its native range may not exist in Florida. (ufl.edu)
  • Spread of the weevil was facilitated by the transport and propogation of infected bromeliads between Florida counties, primarily in the gardening industry. (wikipedia.org)
  • Unfortunately, prevention is no longer an option for many Florida counties that already have established M. callizona populations. (wikipedia.org)
  • Populations of M. callizona in their native range are much smaller than Florida populations because they are likely regulated a specialist parasitoid that is not present in the invaded Florida range. (wikipedia.org)
  • control
  • To date, control of the weevil has been ineffective even with the combined use of several control methods. (ubc.ca)
  • In this paper we describe three studies directed toward alternative control: 1) Pre-emergence nematode applications for pecan weevil control, 2) Exploring interactions among microbial control agents and chemical insecticides, 3) Suppression of pecan diseases using bacteria or bacterial metabolites. (usda.gov)
  • In the second study (interactions among microbial and chemical pesticides), our results indicate potential for enhanced pecan weevil control through the combination of certain microbial agents (nematode and fungi) and chemical insecticides. (usda.gov)
  • The salvinia weevil has been successful at helping to control the aquatic weed giant salvinia in waterways across the southern portion of the state for nearly seven years. (lsuagcenter.com)
  • Sanders said a major outbreak of giant salvinia in southwest Louisiana is now under control with help from the weevil. (lsuagcenter.com)
  • In Arkansas, however, where Cruiser was available under a Section 18 exemption last year, Cruiser provided good control of weevils in commercial fields. (lsuagcenter.com)
  • Thus, there is every reason to believe that Cruiser will provide satisfactory control of weevils under most conditions in Louisiana. (lsuagcenter.com)
  • 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)
  • Other avenues of control that have been explored include weevil-resistant strains of cotton, the parasitic wasp Catolaccus grandis, the fungus Beauveria bassiana, and the Chilo iridescent virus. (wikipedia.org)
  • Although it was possible to control the boll weevil, to do so was costly in terms of insecticide costs. (wikipedia.org)
  • Attempts have been made in New Zealand to biologically control the Argentine stem weevil. (wikipedia.org)
  • L. franki were captive-raised and studied for several years, after an adequate amount of research and the preparation of proper permits they were released in 2007 in an attempt to control weevil populations. (wikipedia.org)
  • entomopathogenic
  • In field plots, we discovered that multiple applications of entomopathogenic (insect-killing) nematodes can substantially reduce pecan weevil populations in pots. (usda.gov)
  • In field plots, we discovered that multiple applications of the entomopathogenic nematode, Steinernema carpocapsae, can substantially reduce pecan weevil populations in pots. (usda.gov)
  • palm weevils
  • Dead Canary Islands date palms, killed by red palm weevils, line a road in La Mersa, Tunis, Tunisia. (keranews.org)
  • Red palm weevils are notoriously difficult to detect - until it's too late," he says. (keranews.org)
  • Primarily due to the existence of numerous color forms across their ranges, the taxonomy and classification of red palm weevils has undergone a number of changes in understanding and circumscription. (wikipedia.org)
  • soil
  • Barriers of cultivated soil around the perimeters of fields will help protect crops from the attacks of crawling weevils. (gov.mb.ca)
  • elytra
  • Along the center of the elytra, some rice water weevils have an elongated dark brown to brownish-black mark. (wikipedia.org)
  • insecticides
  • Insecticides remain the most effective means of controlling weevils. (lsuagcenter.com)
  • Adult weevils can be killed using insecticides and traps, "but what many farmers don't realize is that once you put the pressure on the weevil, you've really got to keep it on," Hoddle says, until they've been fully eradicated. (keranews.org)
  • Preventive applications of insecticides, especially pyrethoids, should be timed with the local Forsythia bloom in order to cut the population before the first generation of eggs are laid for the year. (wikipedia.org)
  • Africa
  • For farmers across East Asia, North Africa, Europe and the Middle East, the red palm weevil evokes serious anxiety. (keranews.org)
  • Originally from tropical Asia, the red palm weevil has spread to Africa and Europe, reaching the Mediterranean in the 1980s. (wikipedia.org)
  • eggs
  • Serious problems do not begin until the rice fields are flooded and the weevils begin to lay eggs. (lsuagcenter.com)
  • One female weevil can lay up to 300 eggs - hiding them inside holes and cavities in the trunk of a palm. (keranews.org)
  • entomologist
  • We did a huge release in north Louisiana in 2009, but the weevils were wiped out in 2010 by cold weather," said Seth Johnson, a retired LSU AgCenter entomologist, who will continue working on the salvinia weevil project. (lsuagcenter.com)
  • Paraguay
  • COI and COII mitochondrial gene sequences were analyzed to test a former hypothesis on the origin of the boll weevil in Argentina, Brazil and Paraguay, using samples from Mexico and USA as putative source populations. (springer.com)
  • During the 1990s, the weevil spread to Paraguay and Argentina. (wikipedia.org)
  • spread
  • Still, he sent a special team of his employees to weevil-infested parts of the country, where they could train to fight the impending menace - and prepare for the eventuality that they would spread to his farms. (keranews.org)
  • leaf
  • It is also known as the sassafras mining weevil, tuliptree leafminer, tulip tree weevil, or the magnolia leaf miner. (wikipedia.org)
  • Before leaf buds on Yellow-poplar, Sassafras, or Magnolia trees open, weevils attack the buds and leave their distinctive feeding marks. (wikipedia.org)
  • Rice water weevils can be monitored by examining field edges for leaf scarring. (wikipedia.org)
  • California
  • In Laguna Beach, California, Hoddle recently helped eradicate a small, burgeoning palm weevil population. (keranews.org)
  • But once the weevils got to California, they didn't just sit tight and wait to be devoured. (keranews.org)
  • This had become a major problem for the newly developed citrus industry in California, but by the end of 1889 the cottony cushion scale population had already declined. (wikipedia.org)
  • 2000). Rice water weevils go through 1 generation in Japan and California, but in parts of southern China and the southern US they will undergo up to 3-4 generations per year. (wikipedia.org)
  • reduces
  • A. nigriscutis will feed on the native Euphorbia robusta Engelm, though this is thought to be acceptable as the weevil significantly reduces leafy spurge populations over time. (wikipedia.org)
  • stem
  • The adult weevils cause damage by eating the bark of seedlings around the 'collar' of the stem, thus 'ring-barking' the tree seedling which usually results in its demise. (wikipedia.org)
  • The Argentine stem weevil is a small grey insect up to 3 mm (0.12 in) long, with a waxy covering. (wikipedia.org)
  • genetic
  • Knowledge of the weevil genetic structure on a small-scale stand level is extremely important in developing strategies that decrease the possible development of tolerance in P. strobi populations to resistant trees. (ubc.ca)
  • researchers
  • Pheromone traps are set up in this field to help growers and researchers monitor sweet potato weevil activity. (growingproduce.com)
  • The Department of Wildlife and Fisheries has given AgCenter researchers a three-year grant for $450,000 to find or create a weevil that can survive a cold winter in the northern part of the state. (lsuagcenter.com)
  • The researchers have been releasing weevils in the area for two years. (lsuagcenter.com)