Method of replacing tobacco aphids and with cabbage aphids to reproduce tobacco aphidius gifuensis and prevent and control tobacco pests

Abstract

The invention relates to a method of replacing tobacco aphids and with cabbage aphids to reproduce tobacco aphidius gifuensis and prevent and control tobacco pests. The method comprises the steps of: (1) cultivating one or more crops of rapes, cauliflowers, cabbages, radishes, green cabbages and Chinese cabbages as the host plants for cabbage aphids; 2) introducing the cabbage aphids to the host plants in the seedling stage so as to be reproduced; 3)introducing tobacco aphidius gifuensis to the host plants so as to be contacted with the cabbage aphids and allowing oviposition and reproduction of the gifuensis in the cabbage aphids to form mummified aphids; 4) transplanting the host plants with the mummified aphids in tobacco fields, or implementing the steps (1)-(3) within or adjacent to tobacco fields, so as to enable the gifuensis in the mummified aphids to grow into gifuensis and to fly over the tobacco fields to find tobacco aphids on tobacco plants to oviposit and be paretic therein, thereby causing mummification and death of the tobacco aphids. In the invention, conventional tobacco aphids are successfully replaced by the cabbage aphids as carriers for reproduction of tobacco aphidius gifuensis, achieving the aim of gifuensis reproduction and aphid killing on the premise of no harm to tobacco plants and no spread of aphid-transmitted diseases, increasing the gifuensis reproduction efficiency by 50% and the aphid killing efficiency by 30%-50% compared with the prior art, enhancing the level in prevention and control of flue-cured tobacco pests, guaranteeing the yield and the quality of tobacco leaves and reducing the gifuensis reproduction cost by over 50%.

Description

technical field [0001] The invention belongs to a tobacco plant protection technology, and relates to a method for preventing and controlling aphids by cabbage aphids instead of aphids for reproduction by aphids. Background technique [0002] Aphids, belonging to the order Homoptera, Aphididae, are divided into two types: winged viviparous females and wingless viviparous females. They are worldwide pests and are distributed in all smoking areas. The harm of tobacco aphids includes two aspects: direct harm and indirect harm. Direct harm refers to the harm caused by adult and young aphids sucking tobacco plant juice, affecting the normal growth and development of tobacco plants, and secreting honeydew, polluting tobacco leaves, and inducing "coal" disease. Indirect harm mainly refers to the loss caused by tobacco disease caused by tobacco as a medium of transmission of various viral diseases. After the tobacco plant is damaged, the growth is slow, the tobacco sheet becomes t...

AI Technical Summary

Problems solved by technology

[0005] However, the problem of the existing method of breeding aphids first, and then releasing Aphids persicae is that Aphis persicae itself is a pest, which directly harms tobacco plants, and simultaneously produces aphid-borne virus, which has 4 effects from parasitism to ossification of wasps. ~5 days, before the aphids become ossified, they are harmful to the tobacco plant

The reproduction of aphids relies on tobacco seedlings as host plants, the method is monotonous, the selection is narrow, and it will be limited by factors such as time

Images