Illinois Field Crop Applicators Test 100%accurate

various, economical, environmentally sound, socially acceptable - ANSWER An integrated pest management program is based upon what factors? Economic threshhold - ANSWER What is the number of pests that should be controlled to prevent economic damage from occurring? Economic Injury level - ANSWER Number of pests, costs of various treatments, expected yield, and expected grain value are all factors to determine.... Do not treat, but scout again later. - ANSWER What should be done if scouting detects an important pest, but its numbers do not reach the economic threshold? random - ANSWER When scouting, where in the field should you sample? Cultural, Mechanical, Biological, Chemical - ANSWER What are the 4 types of control measures used in an IPM? Larvae - ANSWER At what stage in the life-cycle of a Corn rootworm does it prune and tunnel through the roots causing stalk lodging? Adult - ANSWER At what life-cycle stage does a corn rootworm cause ear damage by feeding on the silks? When silks are green, 5 or more beetles per plant if silks are clipped within 1/2 inch of the ear tip. - ANSWER What are the economic thresholds when scouting for corn rootworm beetles in corn? From late July to late august at least 5 beetles per unbaited pherocon AM trap in soybeans or .75 beetles per plant in non-rotated corn. - ANSWER What are the economic thresholds when scouting for corn rootworm beetles in soy? feed on the leaves and older larvae cause leaf cutting leading to reduced stands. - ANSWER What damage does a black cutworm larvae do to corn seedlings? Crop debris, winter annaul weeds, late planted - ANSWER What are 3 factors that have the most potential to lead to black cutworm damage? rescue treatments when nessisary - ANSWER What is the recommended method for managing black cutworms in IL? European corn borer - ANSWER What type of larvae causes whorl damage in 1st gene