Hiệu quả của dịch chiết bã hạt cây sở (Camellia oleifera) và tinh dầu cây dầu giun (Chenopodium ambrosioides L.), cây nghể răm (Polygonum hydropiper L.) trong phòng trừ rầy mềm (Aphis gossypii) gây hại cây chanh dây (Passiflora edulis)

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Tác giả: Thị Mai Trinh Đỗ, Thị Nguyệt Hồ, Thị Huyền Lê, Thị Liên Nguyễn, Minh Ngọc Trương

Ngôn ngữ: vie

Ký hiệu phân loại: 634.42 Myrtaceous and passifloraceous fruits

Thông tin xuất bản: Khoa học (Đại học Cần Thơ), 2022

Mô tả vật lý: 140-149

Bộ sưu tập: Metadata

ID: 500587

Thêm vào giỏ

Bài viết trình bày các kết quả thực nghiệm về hiệu lực phòng trừ rầy mềm của một số dịch chiết có nguồn gốc từ thảo mộc. Độc tính của cây sở (Camellia oleifera) (sử dụng phương pháp ethanol), cây dầu giun (Chenopodium ambrosioides L.) và cây nghể răm (Polygonum hydropiper L.) (sử dụng phương pháp nước) lên rầy mềm trong điều kiện phòng thí nghiệm và nhà màng đã được đánh giá, thông qua hiệu quả diệt rầy mềm của dịch chiết bã hạt cây sở ở nồng độ 20% đạt hiệu quả tốt nhất (75,25% đối với rầy mềm sau 96 giờ phun), tinh dầu giun đạt hiệu quả tốt nhất (76,67% đối với rầy mềm ở nồng độ 0,20%) và tinh dầu nghể răm đạt hiệu quả tốt nhất (64,25 đối với rầy mềm ở nồng độ 0,25%). LC50 cuả tinh dầu giun, tinh dầu nghể răm, dịch chiết bã hạt sở lần lượt là 0,06%
0,11%
5,24 %. Hỗn hợp dịch chiết phối trộn nồng độ tinh dầu giun 0,4% và nồng độ dịch chiết bã hạt sở 20% đạt hiệu quả tốt nhất là 97,33% đối với rầy mềm ở 96 giờ sau khi xử lý. Hiệu lực tiêu diệt rầy mềm trên cây chanh dây của chế phẩm sinh học được đánh giá thông qua thực nghiệm trong điều kiện nhà màng, ở nồng độ 250 mL/L có hiệu quả cao trong việc phòng trừ rầy mềm.This research shows experimental results on the aphids' effectiveness control of some extracts derived from the herbs. The toxicity of tea seed (Camellia oleifera) (using the ethanol method), wormwood (Chenopodium ambrosioides L.) and water pepper (Polygonum hydropiper L.) (using the water method) towards the aphids with laboratory and greenhouse conditions, which have been evaluated, through the corresponding aphids killing effect of the tea seed extract at a concentration of 20% had the best effect (75.25% for aphids after 96 hours of spraying), wormwood oil had the best effect 76.67% for aphids at high concentration of 0.2%, and water pepper essential oil had the best effect 64.25% for aphids at 0.25%. LC50 of wormwood essential oil, water pepper essential oil, and tea seed extract were 0.06%, 0.11%, and 5.24%, respectively. The mixture of extracts with 0.4% wormwood oil concentration and 20% tea seed achieved the best efficiency of 97.33% against aphids at 96 hours after spraying. The effect of killing aphids on passion fruit plants was tested in greenhouse conditions at a concentration of 250 ml/L. It was highly effective in controlling aphids.

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