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Control of stem nematode ( Ditylenchus dipsaci ) in strawberry by granular nematicides
Author(s) -
LEWIS SERFIAH
Publication year - 1979
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1979.tb01125.x
Subject(s) - oxamyl , aldicarb , sowing , fumigation , biology , agronomy , nematode , avermectin , carbofuran , horticulture , pesticide , ecology , anatomy
SUMMARY In an attempt to find a control for stem nematode (Ditylenchus dipsaci (Kühn) Filipjev) on strawberry crops in south‐west England, aldicarb, ethoprophos, oxamyl, terbufos, thionazin and Tirpate were tested on severely damaged plants in pots. All treatments, except terbufos, decreased the number of infested plants; aldicarb and thionazin gave the best control. Fewer infested runner plants were found when the mother plant was grown in soil treated with aldicarb or thionazin. Soil treatment with ethoprophos, oxamyl or Tirpate was less effective or inconsistent in reducing spread of nematodes to the runners. Leaf treatment of the mother plants with ethoprophos or oxamyl reduced the number of infested runners. In a field trial in 1973/74, aldicarb, oxamyl and thionazin were compared with soil fumigation with dichloropropane‐dichloropropene mixture (D‐D). Aldicarb applied at planting decreased the number of plants damaged by stem nematode and increased the number and yield of fruits. Oxamyl granules at planting followed by a spray in February also increased the number and weight of fruits harvested compared with D‐D treated plots. A single application of oxamyl at planting, with or without previous D‐D soil fumigation, or a thionazin drench in February did not reduce damage. In three subsequent field trials in 1974–76, amounts and methods of application of aldicarb were compared with D‐D treatment. Spot applications of aldicarb to plants in heavily infested soil 15 weeks after planting reduced the rate of spread of stem nematode damage but treatment at 30 weeks had little effect. In a less severely infested plot, spot and band treatments of aldicarb, applied 10 and 21 days, respectively after planting, gave good control. Treatment with aldicarb 21 days after planting decreased the number of plants with severe symptoms, whereas serious damage was not prevented by treatment with D‐D in October or May.