Agroscope, Institute for Plant Production Sciences IPS, 1260 Nyon, Switzerland

Control of seed-borne snow mould (Gerlachia nivalis) of winter wheat with warm wate Use of oil for reducing virus Y infection in seed potatoes

In 3-year plot and field experiments, the effect of Telmion, a canola oil, on the PVY-transmission by aphids was investigated. Telmion applications all 10 days reduced PVY infections between 30 and 60 %, independent of aphid density and weather conditions. The oil-treated plants of seed potatoes showed a slight yield reduction of 3 to 10 %. The yield of the seed size 32-50 mm remained, however, almost unaffected by the oil treatment. In order to be cost-effective, Telmion has to be applied only on precious propagation material and/or PVY-susceptible varieties.

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