九州産ツマグロヨコバイの殺虫剤感受性(I)

抄録

The susceptibilities to insecticides of the green rice leafhopper, Nephotettix cincticeps UHLER, collected in the different parts of Kyushu, south-western Japan, were determined by means of microtopical application method and compared with each other.
The local differences of susceptibilities of the insects to metyl parathion and to malathion were recognized as shown in Figures 1, 2 and 3.
From these figures, it seems to be fact that even the insect which had relatively low susceptibility to malathin in Kyushu was more susceptible than the insect which had been recognized as a registant one to malathion in Kochi or Tochigi prefectur.
As shown in Figure 5, it is considered that there might be some correlation between the susceptibility of the insect to malathion and that to Sevin.