Effects of Temperature on Development, Longevity and Reproduction of the Soybean Aphid, Aphis glycines (Homoptera: Aphididae)

Efficacy of Neonicotinoid Seed Treatments to Reduce Soybean Aphid Populations Under Field and Controlled Conditions in Nebraska

“…1B). The presence of two peaks could be related to very warm temperatures, higher than 32ЊC, between 74 and 84 d after planting, which drastically reduces nymph survival (Hirano et al 1996). The heat, combined with the presence of abun- Treatments included imidacloprid (Gaucho 480FS, Gustafson LLC) seed treatment at a rate of 62.5 g (AI)/100 kg seed; thiamethoxam (Cruiser 5FS, Syngenta Crop Protection) seed treatment at a rate of 50 g (AI)/100 kg seed; an untreated control; and an aphid-free treatment, foliar insecticide application -cyhalothrin (Warrior, Syngenta Crop Protection) at a rate of 0.028 kg (AI)/ha.…”

“…However, soybean aphid populations are not reliably suppressed by natural enemies, resulting in outbreaks and significant yield losses in soybean production (Ostlie 2001, Myers et al 2005b). In addition to yield reduction, soybean aphid also can cause indirect effects by transmitting diseases (Clark andPerry 2002, Burrows et al 2005), promoting sooty mold growth (Hirano et al 1996), reducing chlorophyll content (Diaz-Montano et al 2007) and impairing photosynthesis (Macedo et al 2003). Therefore, there is a need to develop soybean aphid management tools and strategies that do not solely rely on native natural enemies.…”

Impact of predation on establishment of the soybean aphid, Aphis glycines in soybean, Glycine max

“…Feeding by A. glycines can indirectly harm soybeans by vectoring alfalfa mosaic, soybean dwarf, soybean stunt, soybean mosaic, tobacco ringspot, and bean yellow mosaic viruses (Van Den Berg et al, 1997;Clark and Perry, 2002;Wang and Ghabrial, 2002). Soybean aphids also cause indirect damage by excreting honeydew, promoting the growth of sooty molds that reduce photosynthetic capacity (Hirano et al, 1996). Development of effective management systems for this new invasive pest requires an understanding of the role of existing predator communities in A. glycines population dynamics (Rutledge et al, 2004).…”

Bionomics of <I>Scymnus</I> (<I>Pullus</I>) <I>louisianae</I> J. Chapin (Coleoptera: Coccinellidae) as a Predator of the Soybean Aphid, <I>Aphis glycines</I> Matsumura (Homoptera: Aphididae)

“…The optimum temperature range for soybean aphid development is reported to be between 22 and 27° C; above 32° C developmental time increases and survival rate decreases (McCornack et al 2004;Hirano et al 1996). No temperatures inside any of the cages rose above 32° C and the cages with the highest temperatures also had the highest number of aphids, suggesting no negative effects of high temperature in the study.…”