Question

'Trichogramma', an egg parasitoid extensively used in biological control programs against lepidopteran pests such as bollworms and stem borers, is typically released into the field in which specific form for effective establishment?

A As parasitized host eggs mounted on Trichocards
B As adult wasps released directly from cages
C As larvae sprayed directly onto the crop
D As pupae buried in the soil
E As eggs mixed into the irrigation water
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