Efficacy of insecticides against tuber flea beetles, wireworms and aphids in potatoes

D. G. Finlayson, A. T. S. Wilkinson, J. R. Mackenzie

Abstract


Soil-incorporated and foliar-applied insecticides, alone and in combination, were tested in silt loam to control tuber flea beetle, <i>Epitrix tuberis </i>Gent., the green peach aphid, <i>Myzus persicae</i> (Sulz.) and the wireworm <i>Agriotes obscurus </i>(L.) Most soil-incorporated band treatments did not give adequate protection from tuber flea beetles. However, supplemental foliar applications, July 15 and 30 and August 15, reduced the percentage unmarketable tubers to 13% under a heavy infestation in 1977 and to 0% in a lighter infestation in 1978. Fonofos, broadcast and soil-incorporated, gave the best control of wireworms and of a light infestation of tuber flea beetles. Methamidophos was the best aphicide

Keywords


potato; wireworm; <i>Agriotes obscurus</i>; tuber flea beetle; <i>Epitrix tuberis</i>; green peach aphid; <i>Myzus persicae</i>

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References


Campbell, C.J. and D.G. Finlayson. 1976. Comparative efficacy of insecticides against tuber flea beetle and aphids in potatoes in British Columbia. Can. J. Plant Sci. 56:869-875.

Duncan, D.B. 1955. Multiple range and multiple tests. Biometrics, 11:1-42.

Finlayson, D.G., M.J. Brown, C.J. Campbell, A.T.S. Wilkinson, and I.H. Williams. 1972. Insecticides against tuber flea beetle on potatoes in British Columbia (Chrysomelidae: Coleoptera). J. Entomol. Soc. Brit. Columbia 69:9-13.

Wilkinson, A.T.S., D.G. Finlayson, and C.J. Campbell. 1977. Soil incorporation of insecticides for control of wireworms in potato land in British Columbia. J. Econ. Entomol. 70:755-758.


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