Control methods of gypsy moth

In order to avoid the harm caused by long-term use of chemical pesticides, people began to explore the use of insect pheromones as a means of control at the beginning of the 20th century. In 1960, the active substance 10 mg was isolated from the two abdominal terminal parts of1000000 female gypsy moth, but it was not successful in the field experiment. 1970, sex pheromones were extracted and concentrated from the ventral ends of 78,000 female gypsy moths, which were widely used for monitoring, forecasting and control of gypsy moths. The method is proved to be simple and accurate in the forecast experiment of gypsy moth. Adult gypsy moth has strong chemotaxis, especially the sex pheromone released by female moth. Using this feature, we can use synthetic sex attractants to trap and kill adult gypsy moths. The difference between sex attractant trapping and lamp trapping is that it is specific, that is, it only works on gypsy moth, so it can be killed centrally.

Improve the environment and protect natural enemies.

As mentioned above, the occurrence of gypsy moth is closely related to environmental conditions. Therefore, improving the stand structure, improving the environmental quality and reasonable close planting are one of the effective ways to control the pest, and also the comprehensive control measures to fundamentally control the occurrence of gypsy moth. According to domestic research reports, there are 6 orders 19 families and 9 1 species of natural enemies of gypsy moth in China. Among them, there are 57 species of parasitic insects, 30 species of ichthyidae, 27 species of parasitic flies, Hemiptera 19 species, and Carabidae 10 species. That is to say, the main natural enemy in the egg stage is Doencyrtus kuwanal (Howard), and the natural enemy in the larva stage is mainly Lepidoptera, that is, flies; The natural enemies in pupal stage are mainly gypsy moth, Apodemus agrarius and flies. There are about 30 natural enemies of gypsy moth in Daxinganling forest region of Inner Mongolia. There are predatory natural enemies such as birds, spiders, bacteria and viruses. Protecting the natural enemy resources of gypsy moth in forest areas at present, reducing the frequency and scope of chemical pesticides, and effectively restricting the population change of gypsy moth through natural enemies can achieve the purpose of avoiding disasters with insects and protect the existing forest resources.