Cooperative Economic Insect Report, Vol. 12: July 20, 1962 (Classic Reprint) - Hardcover

U. S. Plant Pest Control Division

9780331398724: Cooperative Economic Insect Report, Vol. 12: July 20, 1962 (Classic Reprint)

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ISBN 10: 0331398729 ISBN 13: 9780331398724

Publisher: Forgotten Books, 2018

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Excerpt from Cooperative Economic Insect Report, Vol. 12: July 20, 1962

County and few fields had as high as 80 per square yard. Development of both species ranged from first to fourth instar and damage evident in this area.

In Trempealeau County, counts up to 100 per square yard noted. Populations in Rock, Green, Lafayette, Grant, Vernon, Crawford, Iowa, Dane, Marathon, Portage, Waupaca and Adams Counties ranged 0-50 per square yard. (wis. Ins. Illinois Melanoplus spp. Abundant and damaging clover and alfalfa in west district; 25-30 percent leaf area already removed from plants in some fields. Hoppers mostly 2-4 instar and vary 80-180 (average 130) per Square yard. In northwest district, grasshoppers vary 1-3 instar, with hatching still occurring in northern 2 tiers of counties; populations vary 3-90 (average 46) nymphs per square yard. (ill. Ins.

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