Ảnh hưởng của nhiệt độ đến sự gia tăng quần thể của nhện bắt mồi amblyseius largoensis (muma) (acari: phytoseiidae)=Influence of Temperature on Population Growth of Predatory Mite, Amblyseius largoensis (Muma) (Acari: Phytoseiidae)

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Tác giả: Thị Ngà Dương

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: KH Nông nghiệp VN, 2024

Mô tả vật lý: tr.1403-1412

Bộ sưu tập: Metadata

ID: 251266

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Nghiên cứu này nhằm tìm hiểu ảnh hưởng của nhiệt độ đến vòng đời và sức tăng quần thể của loài nhện bắt mồi Amblyseius largoensis nuôi bằng nhện đỏ cam chanh Panonychus citri. Nhện bắt mồi được nuôi cá thể ở 20C
22,5C
25C
27,5C
30C và 32,5C, ẩm độ 75%, 12:12 giờ sáng: tối. Kết quả cho thấy khi nhiệt độ tăng, thời gian vòng đời của nhện bắt mồi A. largoensis giảm rõ rệt. Ở nhiệt độ 20C vòng đời là dài nhất 11,33 ngày và ở 30C vòng đời giảm xuống chỉ còn 6,35 ngày. Tổng số lượng trứng đẻ tăng dần từ 11,83 trứng/con cái ở 20C lên cao nhất 17,48 trứng/con cái ở 27,5C. Tuy nhiên, khi nhiệt độ tăng lên 30C, số lượng trứng đẻ giảm xuống chỉ còn 11,83 trứng/con cái. Khi nhiệt độ tăng, thời gian của một thế hệ (T) và thời gian nhân đôi quần thể (DT) giảm, ở 20C DT giảm từ 6,15 ngày xuống 4,51 ngày (ở 30C). Hệ số nhân của một thế hệ (R0) đạt cao nhất ở 27,5C (10,06), thấp nhất ở 30C là 6,27. Tỷ lệ tăng tự nhiên (rm) cao nhất ở 27,5C (0,178), tiếp theo ở 30C và 25C (lần lượt là 0,154 và 0,162), thấp hơn ở 22,5C (0,137) và thấp nhất ở 20C (0,113). Nhiệt độ tối ưu cho sự phát triển, sinh sản và tăng trưởng quần thể của nhện bắt mồi A. largoensis là 27,5C.This study aimed to investigate the effect of different temperature levels on the life cycle and population growth of the predatory mite Amblyseius largoensis reared on the citrus red mite Panonychus citri. The predatory mites were individually reared at 20C, 22.5C, 25C, 27.5C, 30C, and 32.5C, with 75% RH and a photoperiod of 12:12 hours light: dark. The results demonstrated that as temperature increased, the developmental time of A. largoensis decreased markedly. The longest life cycle was observed at 20C (11.33 days), while at 30C, the life cycle was reduced to 6.35 days. The total number of eggs laid increasing from 11.83 eggs per female at 20C to a peak of 17.48 eggs per female at 27.5C. However, when the temperature rose to 30C, the egg production decreased to 11.83 eggs per female. As the temperature increased, the generation time (T) and population doubling time (DT) decreased, with DT reducing from 6.15 days at 20C to 4.51 days at 30C. The net reproductive rate (R0) was highest at 27.5C (10.06) and lowest at 30C (6.27). The intrinsic rate of increase (rm) was highest at 27.5C (0.178), followed by 30C and 25C (0.154 and 0.162, respectively), lower at 22.5C (0.137), and lowest at 20C (0.113). This study confirms that the optimal temperature for the development, reproduction, and population growth of the predatory mite A. largoensis was 27.5C.

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