Life table of diamondback moth
1988
Piyarat Keinmeesuke | Anan Vattanatanyagam | Ouab Sarnthoy (Department of Agriculture, Bangkok (Thailand). Entomology and Zoology Div. Vegetable and Ornamental Insect Group)
Estimated number of generation of diamondback moth equal 17 generation per year, calculated by used the method of (Yamada and Kiritani, 1983). Life table in dry season (November-December, 1985) in the longest equal 29.25 days and the shortest in hot season (April-May, 1986) 17.88 days. One of the mortality caused of diamondback moth is their parasites such as egg parasite, Trichogramma confusum: larval parasite, Apanteles plutellae Kurdjamov. and pupal parasite, Thyraeella collaris Gravenhorst. The survival rate in dry season were higher than the other seasons. Mortality cause for diamonback moth are rainfall and natural enemies such as egg parasite, Trichogrammatoidea bactrae fumata Nagaraja of which the percent parasition is 16.2-45.2 % and larval parasite A. plutallae Kurdjumov of which the percent parasitism is 6.1-32.4 %, The highest percent parasitism was found in October (Wet season II). Ants and spiders are also natural enemies of diamondback moth.
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