• insecticides
  • Seed treatment insecticides such as Cruiser and Gaucho have been marketed for early season soybean aphid and bean leaf beetle control. (msu.edu)
  • Results from two years of performance trials conducted in Michigan indicate that soybean yield response to these seed-applied insecticides depends primarily upon the aphid pressure experienced during the early growing season. (msu.edu)
  • Conversely, in 2005, with heavy early season aphid pressure, yield response to these seed applied insecticides averaged 6 bushel per acre across four Michigan locations. (msu.edu)
  • Even insecticides with a relatively long residual cannot last when insecticide treatment is done in early or mid-July, particularly during a year when aphid populations are thriving. (unl.edu)
  • Carbofuran usage has increased in recent years because it is one of the few insecticides effective on soybean aphids, which have expanded their range since 2002 to include most soybean-growing regions of the U.S. The main global producer is the FMC Corporation. (wikipedia.org)
  • colonization
  • All aphids were found on the newest leaves, so we imagine colonization was fairly recent, probably within the last week. (unl.edu)
  • Of course, there are always exceptions to any rule, so one should always be watchful for soybean aphid colonization and population increase. (unl.edu)
  • Eggs begin to hatch into fundatrices when temperatures in the spring reach 10 °C (50 °F).[citation needed] Colonization of buckthorn by soybean aphids in the spring can lead to curling of leaves and twigs. (wikipedia.org)
  • Honeydew
  • This is sooty mold that grows on the honeydew that aphids excrete. (unl.edu)
  • Like aphids, phylloxera feed on the roots, leaves, and shoots of grape plants, but unlike aphids, do not produce honeydew or cornicle secretions. (wikipedia.org)
  • Crops
  • As of 2013[update] neonicotinoids have been used In the U.S. on about 95 percent of corn and canola crops, the majority of cotton, sorghum, and sugar beets and about half of all soybeans. (wikipedia.org)
  • corn
  • To improve field crop production in northern Michigan, Michigan State University Extension is coordinating local variety trials of forage grains, peas, corn and soybean. (msu.edu)
  • susceptible
  • Thus, the recommended approach to control this virus in peanuts and other susceptible hosts such as soybean is the planting of PeMoV-free seed. (wikipedia.org)
  • Seeds
  • As of 2014[update], about a third of US soybean acreage was planted with neonicotinoid-treated seeds, usually imidacloprid or thiamethoxam. (wikipedia.org)
  • Dry and snap beans also differ from soybeans (Glycine max), in which the seeds are consumed in a variety of processed forms such as tofu, soybean meal, oil, and fermented forms such as miso. (wikipedia.org)
  • David Voegtlin
  • Drs. David Voegtlin (Illinois Natural History Survey) and David Onstad (Department of Natural Resources and Environmental Sciences) recently visited several soybean fields in Kendall County. (illinois.edu)
  • Fourteen fields in Kendall Township, Kendall County were sampled for soybean aphids on Wednesday, July 16 by David Onstad, David Voegtlin, Ramie Wells, Doris Lagos, Mike White, and Mike Just. (illinois.edu)
  • stems
  • Aphids were observed throughout the plants: on stems and lower trifoliates as well as the growing tips. (illinois.edu)
  • eggs
  • In two studies, the quantity of overwintering eggs had a strong positive correlation with the severity of soybean aphid outbreaks in the following spring. (wikipedia.org)
  • Rag2
  • The gene mapped to soybean linkage group F, flanked by the simple sequence repeat marker loci Satt510, Soyhsp176, Satt114, and Sct_033, located in the same region as the aphid resistance gene Rag2. (environmental-expert.com)
  • Since the resistance gene in PI 200538 also gave resistance to soybean aphid biotypes 1 and 2, it is possible that the gene is Rag2 and not a new aphid resistance gene. (environmental-expert.com)
  • acres
  • Together, these states accounted for 89% of the 63,600,000 acres (257,000 km2) of soybean planted in the United States in 2007. (wikipedia.org)
  • plants
  • They can feed on other plants, but they only readily reproduce during the summer months on soybean. (innovations-report.com)
  • Symptoms of soybeans infested by soybean aphid may include yellowed, distorted leaves and stunted plants. (unl.edu)
  • Reduction in photosynthetic capacity of soybean may occur before plants begin to display symptoms of injury. (wikipedia.org)
  • During this stage, small colonies of soybean aphids appear patchy, occurring on single plants scattered throughout a field. (wikipedia.org)
  • It was common to see winged aphids feeding on the plants with a few first instar nymphs around them. (illinois.edu)
  • An interesting study of the spread of this virus in Georgia showed that the virus moved from infected peanut plants to nearby soybean fields and was only present in soybeans in areas where peanuts were also grown. (wikipedia.org)
  • field
  • Soybean aphids have recently been found in field surveys in northeast Nebraska from Battle Creek to Ponca. (unl.edu)
  • If a tree line or woodlot is adjacent to the soybean field, make sure and include a few sampling locations near these areas. (unl.edu)
  • The earlier a field is treated, the greater the chance that any surviving aphids can later reproduce or new aphids can repopulate the field. (unl.edu)
  • The technologies of optimum control of soybean aphid were made up in the three different modes including soybean sown in the same maize hole, soybean interplanted in maize field and monoculture soybean. (k-state.edu)
  • So, 80 x 100,000 x 500 = 4 billion aphids per field. (illinois.edu)
  • Ten percent would mean that 400 million alate aphids emigrate from one 80-acre field daily. (illinois.edu)
  • suggests
  • George Heimpel suggests that this whole thing is an invasion meltdown initiated by introduced earthworms, which modify the soil to favor buckthorn growth, which then favors the growth of aphids, which then are good food for the invasive ladybug Harmonia axyridis. (scienceblogs.com)
  • Late summer scouting in 2005 and early season scouting this spring suggests that aphid levels may be down in 2006 throughout most of the state. (msu.edu)
  • life cycle
  • In addition to treatment techniques, the publication also contains information about the soybean aphid life cycle, scouting advice and a statewide summary for 2011. (iastate.edu)
  • The soybean aphid possesses a heteroecious holocyclic life cycle, which means the insect alternates hosts and undergoes sexual reproduction for at least part of its life cycle. (wikipedia.org)