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Soybean aphid populations have the potential to increase rapidly and reduce yields (Hodgson et al., 2012). This chapter reviews the identification, biology, and management of soybean aphid. Treatment thresholds, biological control, host plant resistance, and other factors affecting soybean aphid populations will also be discussed.
The soybean aphid has a complex life cycle that involves different physical forms, sexual stages, and two host plant species–soybean and buckthorn (the overwintering host). Plant nutrition, natural enemies, climate, and weather all affect population growth rate, but the typical population doubling time is =6–7 days.
1 paź 2011 · The life cycle of the soybean aphid in the United States is similar to its native range (Wu et al. 2004). Like many aphid species, it has a complex life cycle that involves different physical forms (morphs) and two types of host plants.
Life cycle. Aphids overwinter as eggs on buckthorn in wooded areas. In spring, eggs hatch and several generations of aphids are produced without mating. Winged aphids are eventually produced on buckthorn, that then fly to soybean fields. Numerous generations of both winged and wingless aphids are produced on soybean without mating during the ...
The lifecycle of soybean aphid is complex: soybean aphids are host-alternating (heteroecious) and undergo sexual reproduction during part of their life cycle (holocyclic). Buckthorn ( Rhamnus spp.) is the primary host where cold-hardy soybean aphid eggs overwinter and adults undergo sexual reproduction (Photo 4).
As with many aphids, the soybean aphid has a complicated life cycle, that requires the presence of its overwintering host, Rhamnus cathartica, or buckthorn, a low-profile tree that has higher densities in northern states.
5 lut 2020 · Life cycles. Aphids have complex life cycles (reviewed by Dixon, 1977, 1985a, 1998; Moran, 1992), involving in many species an alternation of generations (sexual and asexual), in turn often involving migration of winged forms from a summer herbaceous host on which asexual propagation continues throughout the spring and summer plant growing ...
