Популационна динамика на листните въшки при зимуващ овес (Avena sativa L.), отглеждан в биологично и конвенционално земеделие
Ключови думи :
овес, листни въшки, числена динамика, плевели, биологично и конвенционално земеделиеАбстракт
Изследването е проведено в сертифицирано биологично и опитно конвенционално поле на ИЗ – Карнобат в периода 2015/16 - 2017/18 година, върху овес сорт Кехлибар. Проследена е числената динамика на листните въшки в двата типа земеделие, както и факторите, които им влияят. В периода на проучването при биологично и конвенционално отглеждане на овеса, от листните въшки се наблюдава основно видът Sitobion avenae L. Плътността на листните въшки е по-висока в конвенционално земеделие. Начинът на отглеждане на овеса, влияе върху съдържанието на суров протеин в зърно, което корелира с нападението от листни въшки. Начинът на отглеждане на овеса, влияе върху числеността на цъфтящата растителност, която е в пряка корелация с паразитоидите, регулиращи плътността на листните въшки.
Литература (библиография)
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