Author： LOERA J. POSTON F. L. WHITWORTH R. J.
Publisher： Entomological Society of America
ISSN： 1938-2901
Source： Annals of the Entomological Society of America, Vol.73, Iss.1, 1980-01, pp. : 24-27
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Abstract
Multiple- and single-tissue feeding studies were conducted in the laboratory during 1977 and 1978 to determine how the southwestern com borer, Diatraea grandiosella;Dyar, responded to selected corn tissues. Tissue type significantly affected larval development time, pupal weight, fecundity, and larval mortality. Larvae fed on tassel tissue had longest development times, smallest pupae, lowest fecundity, and highest mortality rates. Larval mortality was significantly affected in the single-tissue feeding study, but not in the multiple-tissue feeding study. Fecundity was negatively correlated with female larval development and positively correlated with pupal weight. Although all tissues showed signs of larval feeding, male larvae preferred kernel and ear-shank tissues over all others. Female larvae preferred kernel and ear-shank tissues over husk and cob tissues but showed no significant preference between stem and ear-shank or stem and husk tissues. Tassel was the least preferred tissue by both males and females.
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