Woolly Apple Aphid Outbreak Following Use of Fenvalerate in Apples in Canterbury, New Zealand1
- 1 February 1980
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 73 (1) , 49-51
- https://doi.org/10.1093/jee/73.1.49
Abstract
Substitution of the synthetic pyrethroid, fenvalerate, for azinphosmethyl in an apple orchard spray program led to an outbreak of Eriosoma lanigerum (Hausmann) within a single season of use. Aphid colonies on water sprouts of cv ‘Cox’s Orange Pippin’ had a mean of 7.88 colonies/water sprout by Dec. 12, 1978, in the fenvalerate treated block compared with 0.08 colonies under azinphosmethyl treatment. This was due to the low toxicity of fenvalerate compared with azinphosmethyl as shown in laboratory tests: Survival of treated colonies was 77.7 and 33.4%, respectively, with fenvalerate and azinphosmethyl. A midge, Dasineura mali Kieffer, also became much more prevalent under the fenvalerate treatment with 75% of water sprouts infested by mid-February 1979 compared with 14% in the azinphosmethyl block.This publication has 2 references indexed in Scilit:
- Toxicity of synthetic pyrethroid insecticides to predaceous phytoseiid mites and their preyAustralian Journal of Agricultural Research, 1979
- Considerations for the Use of Pyrethroid Insecticides for Deciduous Fruit Pest Control in the U.S.A. 1Environmental Entomology, 1978