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Evaluation of sprayed and granular aphicides against the european asparagus aphid brachycolus asparagi homoptera aphididae in british columbia canada


Journal of the Entomological Society of British Columbia 80: 3-9
Evaluation of sprayed and granular aphicides against the european asparagus aphid brachycolus asparagi homoptera aphididae in british columbia canada
A single spray of disulfoton and 3 of methamidophos (all at 1.12 kg ai[active ingredient]/ha) suppressed populations of B. asparagi Mordvilko on immature asparagus for 90 days with light aphid damage. One application of oxydemeton-methyl (at 0.56 kg ai/ha) kept populations low as compared with the controls, but not low enough to prevent severe foliage damage. Two sprays of endosulfan (at 1.12 kg ai/ha) and 3 of malathion (at 2.24 kg ai/ha) during 90 days did not prevent moderate to heavy damage. The spray threshold of 0.5 B. asparagi/g of asparagus sprig used in this study was to high. No sprays controlled the other aphids present, mostly Myzus persicae (Sulzer). Granular formulations of disulfoton (at 0.5, 1.0, 2.0 and 4.0 kg ai/ha), carbofuran (at 2.0 kg ai/ha) and aldicarb (at 2.0 and 4.0 kg ai/ha) applied as side dressings alongside young asparagus, all gave excellent control for almost 4 mo. CGA 73102 (at 1.0 and 2.0 kg ai/ha) and carbofuran (at 1.0 kg ai/ha) gave significant control for 3 mo. Spray and granular treatments giving the best control also produced the thickest spears the following years.


Accession: 005401887



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