The effect of fertilizing to wheat pests
1994
Luik, A. | Tennison, S. (Estonian Agricultural University, Tartu (Estonia). Department of Plant Protection.)
In summer of 1992 field-experiment with the summer-wheat 'Arkas' was carried out. Wheat was grown in three different ways of organic fertilizing: without organic fertilizer, the residual effect of the manure and the leaves of the beet 40 Mg/ha, using different rates of nitrate fertilizer: 0-40-; 80-; 120-and 160 kg/ha. The dominating pests were: aphids, Thysanoptera, sawflies, beetles, hoppers and leaf bugs. The number was higher by the wheat layering and was falling by the spike formation. Increasing N-doses to 120 kg/ha caused an increase in the number of pests in both phases on the background of beet leaves and without organic fertilizer application. The mutal quantity relations of the species changed along with the change in the number of pests
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