[Pest control of sugar beet [Beta vulgaris], maize [Zea mays] and cereal crops by seed treatment with thiamethoxam [in Belgium]] | Traitement de semences au thiamethoxam pour proteger la betterave sucriere, le mais et les cereales contre les ravageurs
1999
Proft, M. de | Ryckel, B. de | Ducat, N. | Pigeon, O. | Bernes, A. (Centre de recherches agronomiques, Gembloux (Belgium). Dept. de phytopharmacie)
Since 1996, thiamethoxam, a novel neonicotinoid insecticide for seed treatment, is tested in Belgium against soil and foliage pests of sugar beet, maize, cereals and other crops. These research field trials have been conducted following the EPPO (European Plant Protection Organization) guidelines to evaluate the activity of thiamethoxam. The efficacy spectrum of thiamethoxam is very similar as this of imidacloprid, the first neonicotinoid registrated in Belgium. In the trials conducted during the three last years, imidacloprid was of course the principal reference. For sugar beet seeds, treatments were made in facilities of specialised companies, but a check was made on received seeds by conducting chemical analysis in our Pesticide Research Department. The other seeds were treated by ourself and also analysed. Contrary to a lot of trials with treated seeds where the dosages are not sure, in these trials, the tested dosages of insecticides were accurately known. At 60 g a.i. per 100000 seeds, thiamethoxam protects successfully sugar beet against aphids and pigmy beetle, two major pests in Belgium, but also against wireworms and other minor pests. At lower dosages to 30 g a.i. per 100000 seeds, protection remains good, at the very least in normal crop conditions. In maize, thiamethoxam tested in 1997 gave an excellent control of aphids. This year, a big infestation of Metopolophium dirhodum. Walk have made important damages in unprotected plots. In these trials, thiamethoxam appeared more efficient than imidacloprid against aphids. In 1998, wireworm damages were strong in the trials. The protection by thiamethoxam was also excellent. In cereals, the first aim of trials was the control of aphids vector of BYDV. For this use, thiamethoxam gave good results. On the other hand, it controlled neither wheat bulb fly nor bean seed flies. Phytotoxic effects of thiamethoxam have not been observed in any crop.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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