Effect of DDT on Egg-laying by Oscinella frit L.

Abstract

OATS sprayed with DDT soon after emergence largely escape frit fly tiller attack, even on small plots growing within an untreated field. It was not known how DDT confers this protection. Preliminary observations during 1955–56 showed that there were far fewer eggs present on the sprayed than on the unsprayed plots. This was confirmed in replicated trials during 1957–58. The results are given in Table 1.