Predilection for host egg and host plant by Trichogrammatid species collected from different Crops
Annals of Plant Protection Sciences(2018)
摘要
The host egg preference studies revealed that Trichogramma chilonis, which was collected from 8 crops, preferred the eggs of Corcyra cephalonica most (84.8% parasitism), followed by Chilo partellus (55.1%) and Helicoverpa armigera (47.9% parasitism) and Samia ricini eggs were least preferred, T. achaeae was recorded from eggs collected from 3 crops only. The parasitoids obtained from rice, sugarcane, cabbage and dolichos were more robust rather than other 4 crops. The parasitoids collected from sugarcane showed strong recognition to the crop when released back on sugarcane, while parasitoids from other crops did not show any pattern of host-plant recognition. Sugarcane appeared to be the most preferred crop for T. chilonis releases with parasitism of 30.5%, followed by paddy (18.9%), cotton (18.3%) and tomato was the least preferred host plant.
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