Acute effect of carbaryl on the levels of glucose, total protein and total free amino acids in the plant bug, Iphita limbata (Heteroptera: Pyrrhocoridae)
Abstract
Topical application of carbaryl (1-naphthyl N-methyl carbamate) to the plant bug, Iphita limbata, at a concentration of 4.8 μg caused 100% mortality within 24 hr while its 48 hr LD50 was 2.5 μg. No mortality was observed within 48hr, below the concentration of 0.6 μg of carbaryl. The acute effect of carbaryl, on survived insects on a single dose at LD50 concentration showed an elevation in the amount of glucose and total free amino acids in the 1st and 2nd day of post-treatment followed by a decline from 3rd day onwards. Total protein showed a decrease throughout the period of carbaryl exposure up to 8th day of post-treatment.
