Insecticide Susceptibility and Wing-Form Ratio of the Brown Planthopper, Nilaparvata lugens (STÅL) (Hemiptera : Delphacidae) and the White Backed Planthopper, Sogatella furcifera (HORVATH) (Hemiptera : Delphacidae) of Southeast Asia

Publisher Website
Google Scholar
Abstract
The brown planthopper and the white-backed planthopper collected from Thailand and Philippines were more susceptible to 8 insecticides [BHC, DDT, malathion, fenitrothion, diazinon, MTMC (m-tolylmethyl carbamate), carbaryl and MIPC (2-isopropylphenyl-N-methyl carbamate)], especially DDT, than those of Japan. They produced significantly higher percentages of the brachypterous form than Japanese strains when reared on rice seedlings. One of the 2 strains of the brown planthopper collected from Taiwan was similar to the Japanese strain with respect to insecticide susceptibility and wing-form ratio, and the other showed higher DDT-susceptibility and higher percentage of the brachypterous form. The tropical populations of the 2 spp. of rice planthoppers are differentiated in physiological and ecological properties from the temperature populations.