Trapping and Killing Methods of Parasitic Wasps of Alfalfa Leafcutter

Abstract

The invention discloses a trap-killing method for megachile rotundata fabricius parasitic wasps. The method comprises the steps that 1, megachile rotundata fabricius bee hatching plates are placed inphytotron, water trays are arranged below the bee hatching plates, black light lamps are installed between the bee hatching plates and the water trays, the black light lamps are 10 cm away from the water trays, and water in the water trays is replaced regularly; 2, a 1.5% prallethrin attractant device which is screened out is installed in the phytotron, wherein the dosage is 3.25 ml / d / 10 m<2>; 3,on the second day when megachile rotundata fabricius bee cocoons are put in the phytotron, the black light lamps and attractant volatilization device are started, observation is conducted regularly every day, the number of the parasitic wasps in the water trays and the bee hatching plates is counted separately, when observing parasitic wasps without eclosion in two days, the black light lamps areturned off, and the attractant device is removed. Accordingly, the trap-killing effect on the parasitic wasps can reach about 95%, the method is safe to megachile rotundata fabricius bee cocoons, andnormal eclosion of megachile rotundata fabricius is not affected.

Description

technical field [0001] The invention belongs to the technical field of agricultural insect prevention and control, and relates to the artificial breeding of alfalfa leaf-cutter bees, in particular to a method for trapping and killing parasitic wasps of alfalfa leaf-cutter bees. The invention adopts the method of black light combined with chemical traps to trap and kill the parasitic wasps before or at the same time as the alfalfa leafcutter bee emerges. Background technique [0002] Alfalfa ( Medicago sativa ), also known as alfalfa or common alfalfa, is known as the king of pastures due to its richness in protein, amino acids, vitamins and various nutrients. A prominent problem encountered in the promotion of alfalfa cultivation is the lack of sufficient quantity of seeds. One of the important experience of its high yield is to use alfalfa leaf cutter bee to pollinate alfalfa. In countries with developed animal husbandry, the use of alfalfa leafcutters to pollinate alfal...

AI Technical Summary

Problems solved by technology

Because the parasitic wasp is polyembryonic, it can complete two generations of reproduction during the eclosion period of the alfalfa leaf-cutter bee, and the parasitism rate to the alfalfa leaf-cutter bee can reach more than 75%, which has caused serious harm to the population expansion of the alfalfa leaf-cutter bee, resulting in Alfalfa Leafcutter Bee Reproduction Decrease

For trapping and killing parasitic wasps of alfalfa leafcutters, dichlorvos and incandescent lamps are commonly used at home and abroad for trapping and killing. Because dichlorvos is heated and decomposed, it releases toxic gases of phosphorus oxide and chloride. Improper use can easily poison people and cause serious harm to bees. Toxic; after use, it needs to be ventilated, and it is easy to reduce the temperature and humidity of the artificial climate chamber, which is not good for the development of alfalfa leafcutter bees with a longer eclosion period

Images