Illi nois Field Crop Applicators Test 2024 Questions and Correct Answers 100% Verified An integrated pest management program is based upon what factors? - Correct Answer various, economical, environmentally sound, socially acceptable What is the number of pests that should be controlled to prevent economic damage from occurring? - Correct Answer Economic threshhold Number of pests, costs of various treatments, expected yield, and expected grain value are all factors to determine.... - Correct Answer Economic Injury level What should be done if scouting detects an important pest, but its numbers do not reach the economic threshold? - Correct Answer Do not treat, but scout again later.When scouting, where in the field should you sample? - Correct Answer random What are the 4 types of control measures used in an IPM? - Correct Answer Cultural, Mechanical, Biological, Chemical At what stage in the life-cycle of a Corn rootworm does it prune and tunnel through the roots causing stalk lodging? - Correct Answer Larvae At what life-cycle stage does a corn rootworm cause ear damage by feeding on the silks? - Correct Answer Adult What are the economic thresholds when scouting for corn rootworm beetles in corn? - Correct Answer When silks are green, 5 or more beetles per plant if silks are clipped within 1/2 inch of the ear tip.What are the economic thresholds when scouting for corn rootworm beetles in soy? - Correct Answer 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. 1 / 2
What damage does a black cutworm larvae do to corn seedlings? - Correct Answer feed on the leaves and older larvae cause leaf cutting leading to reduced stands.What are 3 factors that have the most potential to lead to black cutworm damage? - Correct Answer Crop debris, winter annaul weeds, late planted What is the recommended method for managing black cutworms in IL? - Correct Answer rescue treatments when nessisary What type of larvae causes whorl damage in 1st generation, stalk tunneling damage in the 2nd generation with possible ear tunneling and stalk rot? - Correct Answer European corn borer Damages corn by coating the tassels and silks with honeydew which reduces pollination. - Correct Answer Leaf Aphid What insects have white, C-shaped, and about 1 inch long larvea which can be differentiated by their raster patterns? - Correct Answer Japanese beetle grubs and other white grubs.They chew on the roots and root hairs of seedlings resulting in irregular emergence, reduced stands, and stunted or wilted plants. Injured plants may turn purple because they cannot take up phosphorus. - Correct Answer Japanese beetle grubs They are metallic looking green beetles that are 3/8 to 1/2 and inch long with coppery wing covers. - Correct Answer Japanese beetle adults.What kind of damage do Japanese beetle adults cause? - Correct Answer feed on the silks 1/4 inch beetle, black triangle on neck just below the head? - Correct Answer adult bean leaf beetle.When bean leaf beetles feed on cotyledons and first true leaves what is the amount of beetles per foot of row that is the economic threshold? - Correct Answer 16 or more
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