Effect of Temperature on the Development of Tetranychus telarius L.

Abstract

IN view of the economic importance of the glasshouse red spider mite, it is desirable that the effect of environment on its rate of development be accurately determined in order that the intervals between applications of acaricide can be estimated effectively. The only available experimental figures are those of Van Marle¹ and of Linke², and these are either based on a few scattered observations or cover an outdoor temperature-range too low to be applicable to glasshouse conditions. As our results suggest a more rapid development at high temperatures than has hitherto been assumed, we are publishing some preliminary figures in Table 1.