Method for preserving ophraella communa in winter and raising ophraella communa in plastic tent

Abstract

The invention relates to a method for preserving ophraella communa in winter and raising ophraella communa in a plastic tent, comprising the following steps: placing the ophraella communa on ragweed plants in an insectary for free reproduction from the end of September to the middle ten days of November; using ragweed plantlets with the height of 20-25cm to feed adult ophraella communa for oviposition in the winter and preserving the adult ophraella communa indoors at the temperature of 12-14 DEG C; in early April, transferring cup-loaded ragweed plantlets with eggmass preserved in the winter, and planting the cup-loaded ragweed plantlets with the eggmass between two ragweed plants which previously grow in the plastic plant, ensuring that each plastic tent has no less than 1000-1500 eggs;raising the hatched eggs for 2 generations, replenishing 3-4 hours of illumination in the plastic tent at every night to ensure daily illumination shading value to satisfy the formula of L:D=16:8 andensuring the oviposition rate of adults and the growth rate of larvas; in the first ten-day period of June, collecting pupas in an insect raising box; and then carrying out long-distance transportation and field release on the pupas to effectively control growth of the ragweed. The method is simple and has the characteristics of labour saving and low cost compared with indoor manual large-scale raising; and in addition, the number of natural enemies raised according to the method of the invention is far more than the number of natural enemies raised indoors.

Description

technical field [0001] The invention relates to a method for storing natural enemy insects in winter and raising them in a greenhouse, and belongs to a method for storing and raising them in a greenhouse in winter, which is a specific natural enemy of the invading malignant weed ragweed. Background technique [0002] Ragweed (Ambrosia artemisiifolia L.) is one of the most harmful invasive weeds in the genus Ambrosia. It was introduced into my country in the 1930s. Due to the lack of effective natural enemies, its population rapidly spread and spread. Now it is distributed in 23 provinces (municipalities and autonomous regions) in Northeast my country, North China, East China, Central China and South my country. Production, human health and biodiversity are all at great risk. In order to effectively control ragweed, people usually adopt methods such as chemical herbicides and manual extraction. Although chemical control has quick effect and simple method, because ragweed see...

AI Technical Summary

Problems solved by technology

Although chemical control has quick results and simple methods, because ragweed seeds have the characteristics of secondary dormancy, it needs to be controlled year after year, so it costs a lot of money and pollutes the environment

Manual removal is labor-intensive and time-consuming. It is only suitable for the control of ragweed in the front and back of residences and urban or tourist areas, but it is also difficult to eradicate. For example, Tieling City, Liaoning Province has organized tens of thousands of people to participate in the "ragweed control month" activity for many years since 1985. , but with little effect

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