Abstract
The article presents monitoring results of spreading and harmfulness of Rhinoncus sibiricus in Primorsky krai. There was evaluated efficiency of chemical and biological preparations for Rhinoncus sibiricus control. The most biological efficiency under the treatment of chemical preparations was 93,5%, -biological preparations -92,9%. Maximum yield was achieved under the treatment of Kinmix 1,42 t/ha and Phytoverm 1,35 t/ha. It was defined that in the conditions of the region the optimal sowing term for buckwheat is period from June 20 till July 1. The best predecessor is perennial grasses that maintain the most yield and decrease damage Rhinoncus sibiricus of the plants.
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