Control of <i>Spodoptera littoralis</i> (Boisd.), <i>Myzus persicae</i> (Sulz.) and <i>Tetranychus urticae</i> (Koch) by cold storage and fumigation

Abstract

In laboratory experiments, all stages of the Egyptian cotton-leaf worm ( Spodoptera littoralis (Boisd.)) were killed by exposure at 1–2%C for ten days, but the peach-potato aphid ( Myzus persicae (Sulz.)) and the red spider mite ( Tetranychus urticae (Koch)) were not controlled by this treatment. When exposed to methyl bromide, all the S. littoralis eggs tested were killed by a concentration × time product (CTP) of 44 mg h/litre at 18%C, but control of all stages of M. persicae and T. urticae required a CTP of at least 88 mg h/litre.