The influence of preceding crops and fungicides applied to seed tubers on bare patch of potato
2008
Shcheglova, O.V. | Malyuga, A.A | En ina, N.N., Siberia Research and Development Inst. of Farming and Chemization of Agriculture, Novosibirsk (Russian Federation)
The data of biological efficiency of various preceding crops (wheat, barley, oat, rape, mustard) and fungicides applied for seed tuber treatment to control bare patch of potato are presented. It is shown, that rape and mustard reduce number of the pathogene of bare patch in soil by 1.6-3.8 times, development of disease by 2.1-2.8 times and increase number of healthy tubers by 1.6-1.9 times. Tuber pickling decreases in 1.4 times infection by bare patch of seedlings appeared. The highest effect can be observed at growing potato after rape. Preplanning treatment of seed material allows to receive in addition 2.500 kg healthy tubers per hectare. It is established, that in case of presence of great number of Rhizoctonia solani (higher than threshold of injuriousness) in soil it is necessary to refuse wheat as a predecessor of potato, to choose oat, rape or mustard. The best predecessor for healthy tuber yield is rape (yield in addition is 8400 kg per hectare).
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