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Information × Registration Number 0223U005015, (0121U108484) , R & D reports Title Improving the system of sunflower protection against pests in the area of ​​Western Polissya popup.stage_title Удосконалення системи захисту соняшнику від шкідливих організмів в зоні Західного Полісся Head Snizhok Olena V., Кандидат сільськогосподарських наук Registration Date 13-12-2023 Organization Institute of Agriculture of Western Polissya, National Academy of Sciences of Ukraine popup.description1 Improve the system of sunflower protection against diseases, pests and weeds in the area of ​​Western Polissya. To study the species composition of pests in the sunflower agrocenosis and the influence of modern pesticides on their development and spread. Make an economic assessment and technical efficiency of chemicals. popup.description2  The object of research is the species composition of pathogens and the dynamics of their development in sunflower crops. The subject of research is sunflower, diseases, weeds, pests, spraying, herbicides, fungicides, insecticides. Research methods. The research is based on field experiments using the following methods: visual - to determine the phenological phases of growth and development of the culture; counting - to determine the development of diseases, pests, parameters of crop structure and seed yield, seed quality; chemical - to determine the content of nutrients in the soil; mathematical and statistical - to assess the reliability of research results; calculation and comparative - for the analysis of economic efficiency. On sunflower crops during the years of research (2021-2023), the largest number of weeds was observed on the variant without herbicides (control), which amounted to 716.7 pcs./m2, the predominant number of which was 380.4 pcs./m2 made up of flat ordinary. The highest technical efficiency of soil herbicides Proxonil 720, KE (2.2 l/ha) and Pledge 50, ZP (0.12 l/ha) was at the first count (7 days after emergence) and was 94.4–97, 7%. A new wave of weeds was observed 21-24 days after spraying with soil herbicides. The largest share in the weed coenosis was occupied by common flat grass from 76 to 83%. In the options where soil herbicides and graminicide were applied, the number of weeds did not exceed 51.4 pcs./m2, which is 4 times less than when using only soil herbicides (196.2 - 207.3 pcs./m2). The technical efficiency of using the fungicide Akanto Plus (1 l/ha) against septoriosis was at the level of 80.6-88.5%, white rot on sunflower stems 82.3-88.5%, white rot on baskets - 80.0-82 .8%. With an intensive protection system, the yield of sunflower seeds was 2.49 - 2.53 t/ha, in the absence of a protection system, the yield was at the level of 1.35 t/ha. The analysis of the economic efficiency of sunflower cultivation for the years of Product Description popup.authors popup.nrat_date 2023-12-13 Close