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level: General pests

Questions and Answers List

Question	Answer
True or false: Adult Japanese Beetles should be treated when ETs are reached.	True
What type of pest is this?	Differential grasshopper
What type of pest is this?	Red-legged grasshopper
How many grasshopper generations per year?	1
True or false: Grasshoppers start the season in grasslands, and move into soybean fields when it gets hot and dry	True
When and where to scout for grasshoppers?	In June and July, check field borders.
What density along field borders justifies grasshopper treatment?	10-20 per square yard
What density justifies grasshopper treatment when they have moved into the field?	3-7 per square yard
True or false: Grasshopper nymphs are easily controlled with insecticides	True
What kind of pest is this?	Japanese beetle
When do Japanese beetles lay eggs?	July-August. Minimal damage below ground at this time.
What do Japanese beetles feed on in the spring?	Seeds, seedlings, roots, root hairs. Can reduce crop stands if not treated.
ET for Japanese beetles in soybean	20% defoliation
ET for Japanese beetles in corn	50% of silks clipped to within 1/2" of husk.
True or false: There are no rescue treatments for early-season Japanese beetle infestations.	True
True or false: Adult Japanese Beetles should be treated when ETs are reached.	True