ENT378 Lecture Notes - Lecture 1: Melanin, Forest Tent Caterpillar Moth, Parthenogenesis
5 Nov 2014
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Document Summary
Parasitic wasps use melanisation process to seal the exoskeleton of caterpillar from bleeding. Injected eggs have virus encoated and venom along with it. It does not replicate in caterpillar, just transcribes: targets immune, endocrine, brain, reproductive, virus is mutualism with wasp pathogenic to caterpillar. Tobacco worm nicotine sequestration/secretion defence etc Reproductive: parthenogenesis no males - some insects are distributionally parthenogenic, haplodiploidy. The egg hatches inside the parent and attaches to milk gland. Develops and goes through molts etc until the mother gets robust enough that she deposits a late stage larva into the soil/sand which then burrows and pupates immediately. i. Feed and give birth simultaneously, offspring can feed before completely being born. [some chorions are designed to look like seeds and birds cant digest them so they transport them by accident and poop out] Peritrophic membrane encapsulates the food coming into the midgut. Also acts as a barrier for the insect to protect from harmful bacteria etc .
