Preliminary results of integrated control in cucumber in the Canaries.
The results are presented of an integrated control programme carried out for greenhouse cucumbers in the Canary Islands. The aphelinid Encarsia formosa was introduced to control the aleyrodid Trialeurodes vaporariorum, while the phytoseiid Iphiseius degenerans [Amblyseius degenerans] was used to control Tetranychus urticae in combination with dicofol. Applications of other biologically compatible pesticides, including acephate and Bacillus thuringiensis, were made to control pests such as the leafmining agromyzid Liriomyza trifolii and Lepidoptera. This was combined with the use of yellow traps. Migration of aleyrodid populations affected biological control by the parasitoid. The yellow traps were shown not to control the aleyrodid but did appear to have some effect on L. trifolii populations. Reduction of pesticide applications by 80% did not adversely affect cucumber production.