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1/8 Beware the thrips threat. The onion thrip, Thrips tabaci is considered to be the major insect pest of onions Bulb yield can be reduced up to 30% and the damage is compounded by if thrips infect the crop with Iris yellow spot virus, of which they are the main vector. 
2/8 damage caused by thrips can also provide other pathogens with entry points. Thrips species have wide host ranges, feeding on both broadleaf and grass species. Thrips feed on the leaves of onion plants, causing white or silver lesions. High level infestations cause significant
3/8damage that results in reduced photosynthetic area and the plant's ability to produce photosynthates for the developing bulb is compromised. Infestations that develop during the early stages of bulb formation have the largest impact on bulb size and quality. Infestations later
