Economic Injury Levels and Economic Thresholds for Cereal Aphids (Homoptera: Aphididae) on Spring-planted Wheat

Author： Johnston Richard L.   Bishop Guy W.  

Publisher： Entomological Society of America

ISSN： 1938-291X

Source： Journal of Economic Entomology, Vol.80, Iss.2, 1987-04, pp. : 478-482

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