AgroStar Krishi Gyaan
26 Mar 20, 03:00 PM
Insect Life Cycleappliedbionomics.com
Trichogramma egg parasitoid wasp life cycle
Trichogramma is a minute egg parasitic wasp, that attacks the eggs over 150 species of moths, including cabbage looper, codling moth, oriental fruit moth, twig borers and fruitworms.
The different species in Trichogramma are Trichogramma japonicum, Trichogramma chilonis etc.
A complete life cycle takes 14 days at 21oC (70oF).
Sex ratio in the population is about equal (50% females).
Females lay 60-70 eggs in moth eggs over a period of 1-2 weeks.Most
Trichogramma eggs are laid within 1-2 days after mating.
Larvae take 10 days to develop within the moth egg, which turns brown or black as the larvae pupate.
Pupation takes place inside the host egg itself.
Adults begin to emerge within 2-3 days at 20-27 ºC (68-81 ºF) and over 60% relative humidity.
They chew a small hole in the moth egg to emerge. Males emerge slightly
earlier and await female emergence for mating.
Adults are less than 1 mm (1/25 inch) long.Adults can feed on nectar,
honeydew, and pollen.
Total life span may be 7-75 days depending upon temperature, relative humidity and species of moth parasitized. There may be 30 or more generations per season.
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