Change of noxious organisms dominance in white head cabbage at different methods of growing | Изменение структуры доминирования вредных организмов в агроценозах капусты белокочанной при разных способах ее выращивания
2012
Prishchepa, I.A. | Volchkevich, I.G. | Kolyadko, N.N. | Popov, F.A. | Maslenkina, I.N., National Academy of Sciences. Scientific and Practical Center for Arable Farming (Belarus). Institute of Plant Protection
Based on the results of itinerary inspection a comparative analysis of change of weed specific composition, phytopathogenic microorganisms and phytophages in white cabbage (Brassica oleracea convar. capitata var. alba L.)at different methods of growing is done. It is determined that in white head cabbage crops and plantings prevail Chenopodium album, Echinochloa crus-galli, Polygonum L. spp., Amaranthus retroflexus. In the share of specific composition the dominant weed species incidence at non-seedlings method of crop growing has made 21,55 with the average number 12,6 pcs/ m2; at that time using the seedlings method of cabbage growing the dominant species incidence has made 15,4% with the number 17,3 pcs/m2. Structure of phytopathogenic complex of disease agents by qualitative index prevail in the crop agrocoenosis at non-seedlings method of growing. This method is directed to more dense plant sowing where the most favorable for the diseases microclimate is created. What concerns phytophages, by the degree of colonization and their number in white head cabbage there are similarities and differences depending on the method of growing. Starting from rosette formation stage, the crop plantings and crops colonization by sucking and leaf-biting pests practically did not depend on cultivation method. Representatives from Diptera order and some Coleoptera species are the most harmful in cabbage grown from seeds. The obtained results by the structure of noxious organism specific composition give an opportunity to optimize the tactics of plant protection products application in white head cabbage depending on the method of growing.
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