A laboratory evaluation of some leaf extracts against Ferrisia virgate (Cockrell) infesting Calotropis gigantea (L.) at medicinal plant garden of Narendrapur, West Bengal
Shreyasi Chatterjee, Salil Kumar Gupta
Among the six leaf extracts, viz. (black pepper, carrot, lemon grass, wood apple, marigold and tulsi - all at 5% concentration) were evaluated to cause mortality of Ferrisia virgata (Hemiptera : Pseudococcidae) infesting Calotropis gigantea. So far as mean mortality is concerned, among all the six extracts, marigold and wood apple were better as compared to other treatments, Tulsi was just next to the former two and black pepper, carrot and lemon grass were inferior to the other treatments.