Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

An evaluation of supervised systems for applying insecticide treatments to control aphid and foliage caterpillar pests of cabbage.

Abstract

This paper was presented at a conference held in Brighton, UK, on 21-24 November 1988. Simple damage thresholds, based on the percentage of plants infested by Brevicoryne brassicae and larvae of Pieris rapae, Mamestra brassicae, Plutella xylostella and Evergestis forficalis, were evaluated on cabbages in Austria, UK, German Federal Republic, Irish Republic and Switzerland in 1985 and 1986. Pest control, based on these values, was as efficient as routine spray programmes and reduced the amount of insecticides applied by 50% and the numbers of sprays by 25%. A sequential sampling scheme was as efficient and gave similar reductions in treatments as those obtained with threshold values in the previous 2 years but reduced the time taken to monitor the crop.