Life cycle, food consumption, and seasonal fluctuation of Oligota flavicornis (Boisduval & Lacordaire) on eggplant

Life cycle, food consumption, and seasonal fluctuation of Oligota flavicornis (Boisduval & Lacordaire) on eggplant

1993

A:PS

Oligota (Holobus) flavicornis was reared on the eggs of Tetranychus kanzawai in an incubator at 28³C and LD 13:11. About 16 days were required to complete a life cycle. The egg stage, 3 larval instars and pupal stages lasted for 3.3, 2.3, 1.1, 2.0 and 8.3 days, resp. The 3 larval instars consumed, resp., 57.5, 101.0, and 174.5 eggs of T. kanzawai. The longevity of adult females and males was 43.3 and 48 days; and food resources required were 4656.0 and 2125.7 mite eggs, resp. The adult females laid 186 eggs, 4.6 eggs daily on average. There were several ovipositing peaks during the oviposition period. In a field survey [in Taiwan] in April-October 1991, the population of T. cinnabarinus on eggplants [aubergines] peaked in June and in August-September, whereas the population of O. (Holobus) flavicornis was observed later than that of the mite, with a single peak in late September, and showed delayed density-dependence on the population of the tetranychid. Rainfall was an important factor influencing the population of the staphylinid.

v.13(1):1-8, CHINESE JOURNAL OF ENTOMOLOGY

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