ảnh hưởng của thuốc trừ sâu đến rệp hại và bọ rùa bắt mồi trên ruộng đậu đen ở vùng đồng bằng tỉnh Nghệ An năm 2009-2010

• Tác giả: Thị Việt Nguyễn, Ngọc Lân Trần, Quang Côn Vũ
• Ngôn ngữ: vie
• Ký hiệu phân loại: 632.7 Insect pests
• Thông tin xuất bản: Báo cáo khoa học Hội nghị Côn trùng học quốc gia lần thứ 7, 2011
• Mô tả vật lý: 743-751
• Bộ sưu tập: Metadata
• ID: 506920

Tóm tắt

 On the black bean field in Nghe An province the predator lady-beetles were recorded 12 species. from them the subfamily Coccinellidae has 10 species. 4 species are predominate incillding Micraspis discolor species which has the largest amount of (44.88 percent). Aphid and their predator lady-beetles occur early while beans have 1 - 3 cotyledons and during time until harvest. The population dynamics of aphids and lady-beetles are differences between the tWo black bean fields - do not spray pesticide (NSP) and spray pesticide (SP). On the non-spray bean fielc
 l change in the number of aphid reached one peak at the moment flowering of beans. the lady-beetles achieve a population increase in one peak too. In contrary in the spraying bean field the number of aphid population fluctuates and reach 2 peacks. The first peak appeares early flowering and the second peak in fruit development period after spraying. The lady-beetle number also fluctuates with two low peaks at the same moments of two aphid peaks. The average density of aphids in the SP field is higher than that in the NSP field, in contrary the average density of predator lady-beetle in SP field is lower than that in the NSP field.