Moldovan V. The substantion and the and the development of the complex action of the protection of the mixed crops of maize from weeds in the western forest-steppe zone of Ukraine

The economic threshold of the expediency of carrying out of the actions of maize crops protection from annual kinds of weeds comes with their compactness of 5 per square m. Mixed (wide-row) crops of maize with leguminous crops are more competitive to them and the economic threshold of the expediency of their destruction in these crops is 10 per square m. The carrying out of before-coming up and post-coming up harrowing in a combination with two or three inter-row loosening during crops vegetation give the opportunity to reduce the weeds number in maize crops for the silage in 65-69%, maize with soybean - 65-70%, maize with lupin white - 65-69%, maize with fodder beans - 63-71%. Thus the crops capacity of dry substance of these crops increased in 5,2-7,2; 4,5-7,5; 5,1-7,2; 6,5-8,6 t/he. It is learned out the biological efficiency of post-coming up herbicides - bazahran, 48% water solution harmony, 75% water saluted; hranuls tell, 75% water saluted hranuls. It is proved the given preparations and their tank mixtures effectively destroyed the weeds and showed high selectivity to maize and soybean plants. In maize crops with lupin while all the herbicides which were learned destroyed the plants of a leguminous component. In agrocenoses of maize with fodder beans only bazahran (2,5 l/he) became the selective to the last plants. That's why only the using of herbicides in maize crops and in its mixtures with soybean is the most economically expedient. The application of agrotechnical actions of weeds control is economically and energetically expedient in all crops which were studied.