Showing papers by "Erin W. Hodgson published in 2008"
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01 Jan 2008
TL;DR: In this article, male Russian wheat aphids have never been detected in North America, and therefore an overwinter egg is probably not produced as with many other species, and females reproduce asexually all year long and give birth to live young for 60-80 days.
Abstract: Interestingly, male Russian wheat aphids have never been detected in North America, and therefore an overwinter egg is probably not produced as with many other species. Females reproduce asexually all year long and give birth to live young for 60-80 days. Russian wheat aphids seem to be more cold-tolerant than other grain aphids, surviving exposure to -13 F. Temperatures greatly influence developmental rates, with optimal growth (86 F) generating adults in 7-10 days. Quick freezes and extended periods of snow cover are detrimental to winter survival.
11 citations
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01 Jan 2008
TL;DR: Black grass bug nymphs and adults have a beak with a piercing-sucking stylet, and feed on the mesophyll cells of leaf blades as discussed by the authors, the tissue between the upper and lower epidermis of a leaf blade and contains chloroplasts.
Abstract: Black grass bug nymphs and adults have a beak with a piercing-sucking stylet, and feed on the mesophyll cells of leaf blades. The mesophyll layer consists of the tissue between the upper and lower epidermis of a leaf blade and contains chloroplasts. Typically these bugs feed on the upper leaf surface. Feeding begins at the leaf tip of younger leaves, gradually moving toward the leaf base. White spots and chlorotic blotches often appear near feeding sites. Heavily infested plants will have reduced green-leaf area and appear frosted, yellow or straw colored (Fig. 3). Small black spots of excrement covering plants is also an indication of heavy feeding. What You Should Know
3 citations