EFFECTIVENESS OF PRE-EMERGENCE HERBICIDES ON CROPS OF MILLET
2016
A. E. Lupanov
When growing agricultural products are very important questions: what is the number of weeds per 1 m2, which was termed the threshold, reduces the yield of crops and in what quantity it is advisable to apply control measures against them. To answer them clearly is very difficult, as it depends on the following parameters: density of crops, the degree and phase of development of cultivated plants; soil and weather conditions prevailing in the growing season of the crop; number of weeds; species composition of weeds and their relationships. However, if all methods of technology of cultivation at cultivation of millet the first parameter is adjustable and measures for the control of weeds occur on crops are well developed with optimum plant density. Weather conditions factor is not adjustable, therefore the application of the method of weed control is justified by the condition of crops at the time of the decision. Therefore the most important parameters are the number, species composition of weeds and their integrated indicator of harmfulness. The most difficult is the estimation of harmfulness. The difficulty lies in the fact that crops of millet occurs in a large number of different weed species. The ratio between the different species is very highly variable even on a very small plot, not to mention the field. This article presents modern herbicides to protect millet against annual and perennial weeds, as well as the analysis of the infestation of crops of millet and the optimal timing of the introduction of selective herbicides.
显示更多 [+] 显示较少 [-]