Biology of Delphacodes lutulenta (Homoptera: Delphacidae)

Publisher： Entomological Society of America

ISSN： 1938-2901

Source： Annals of the Entomological Society of America, Vol.76, Iss.2, 1983-03, pp. : 274-277

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Abstract

The biology of Delphacodes lutulenta (Van Duzee) was studied in a greenhouse and laboratory under controlled conditions. Eighteen different species or cultivars of plants proved to be host plants; the planthopper produced more progeny on Triticum aestivum L. var. Abe than on any other plant tested. Fifteen females produced an average of 243 progeny per female. The sex ratio was 1:1. Average longevities for the male and female were (mean ± SE) 27 ± 2.4 and 33.9 ± 3.3 days, respectively. Average fecundity of nine females was 430 ± 6.9 eggs per female. Unmated females did not produce viable eggs. There was no significant difference (P > 0.05) in oviposition between brachypterous and macropterous females. Development was completed in five (n = 20) or six (n = 4) instars by both males and females. The times required for development of the male (33.4 ± 0.8 days) and female (34.2 ± 0.7 days) were not significantly different (P > 0.05).