An Outbreak of the Spotted Spittle Bug on the Orchardgrass and its Insecticidal Control, II
1971 Volume 1971 Issue 22 Pages 24-26
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1971 Volume 1971 Issue 22 Pages 24-26
Snice 1966 at a grassland in Kitakami mountain range, Iwate prefecture, the orchardgrasshas been severely damaged by the spotted spittle bug, Aphrophora stictica MATSUMURA. In 1969 and 1970, field experiments were undertaken to evaluate the effect of several insecticides for controlling the spittle bug. The results in 1969 were given in a previous paper (Kobayashi & Oku 1970). In 1970 the insecticidal application was made on May 18th just before the completion of hatching of the overwintering eggs, and the number of survivors was counted on June 5 th and June 26th. From the results in the two years, it was concluded that Bassa granules (5%), Bassa dust (2%), diazinon granules (3%), diazinon dust (2%), Baycid dust (2%) and Sumithion dust (2%) at 6K gper 10a, 0.1% solutions of Baycid emulsion (50%) and of Sumithion emulsion (50%), and 0.05% solution of Salithion emulsion (25%) at 130l per 10 a are substantially effective.
