Влияние кратности фунгицидных обработок на поражение болезнями и урожайность озимой пшеницы
2011
Brukish, D.A. | Sidunova, E.V. | Kalyasen, M.A., Grodno State Agrarian Univ. (Belarus)
In the conditions of the Republic of Belarus there was studied the influence of frequency of fungicidal treatments on diseases affection and yields of winter wheat (Triticum aestivum). The field experiment with winter wheat was realized with 4-time frequency at the agricultural production co-operative 'Putrishki' (Belarus). In course of the study there were analysed the following fungicidal doses: 1. Rex Duo, suspension concentrates in dose 0,6 liter/hectare (standard); 2. Rex Duo, suspension concentrates ( 0,6 liter/hectare) + Karamba, aqueuos solution (1,5 liter/ha); 3. Rex Duo, suspension concentrates (0,6 liter/hectare) + Abakus, suspended emulsion (1,75 liter/ha) + Karamba, aqueuos solution (1,5 liter/ha). Studies have found that a single spraying of winter wheat by the fungicide Rex Duo reduced to some extent the development of disease on the leaves. Double spraying was more effective in reducing disease manifestations both at leaf area and at spike. Additional treatment has provided significant reduction in intensity of diseases increase in crops of a winter wheat, since a phase of flowering. Only at half of plants the second leaf was damaged by Septoria Leaf Spot and at 22% - by mealy dew, and development of diseases had a depressive character. Triple treatment of winter wheat with fungicides protected plants from Cercosporella spot, root rot, Septoria leaf spot, powdery mildew and Fusarium head blight since 32 stages of crop development. And this treatment provided additional yield of 15.7-36.3 centner/ha.
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