An isotropic tube for the control of meat insects

At present, Beijing's "Okubo" peaches have begun to appear on the market, all of them are watery and mouth-watering. If we find a fleshy bug when we eat peaches, nine times out of ten, it will be a pear heart borer. Peach farmers are most worried about the emergence of pear heart borer on peach trees, because this pest not only has a great impact on the quality of peaches, but also continues to affect the growth of peach trees. So, in addition to the traditional chemical control methods, what other methods are available? Needless to say, there is a new biological control technology-isotropic disperser, which only needs to wrap a small section of rubber hose on the peach tree to reduce the insect population density, thus greatly reducing the use of pesticides, efficient and environmentally friendly.

Pear borer borer drills fruit

Chemical pesticides look on insects and sigh

Pear heart borer, referred to as "pear small", commonly known as "shoot borer", is a worldwide fruit tree pest, which can damage more than 20 kinds of fruit trees. in China, the damage area of peach orchard, pear orchard, apricot orchard and apple orchard alone reaches 40 million-50 million mu. Pear heart borer larvae can harm the young shoots of peach trees, which wither quickly after being damaged, each larva can damage 3-4 new shoots, and the damage rate of young shoots in seriously damaged areas (peach) is as high as 80%. The larvae can also drill into the fruit for damage, the worm path has silk spit out by the larvae, and the fruit decay rate is as high as 80% Murray 90%, seriously affecting the growth of peach trees and the yield and quality of the fruit, bringing heavy losses to fruit farmers.

For a long time, the control of pear heart borer is mainly based on chemical pesticides, but because the pests drill into the fruit, chemical pesticides are difficult to contact, so the control effect is not ideal. In addition, with the increase of drug resistance of pests and the increase of chemical control times and concentration, not only the cost of control increased rapidly, but also the ecological environment was seriously damaged because of killing a large number of natural enemies and beneficial insects, pesticide residues and soil pollution. The safety of fruit has decreased, which has seriously restricted the healthy and sustainable development of peach industry in Beijing.

Identification of interference information by isotropic scatter

Let the male and female lose their way.

In order to screen the biological control techniques that can replace chemical pesticides to control pear borer, in recent years, Beijing Plant Protection Station has carried out a study on the application of sex pheromone isotropy technology to control pear borer in Pinggu District. As we all know, mating between females and males in nature depends on the sex pheromones emitted by females to attract males. Sex pheromone addiction technology is to put artificial bionic and high concentrations of sex pheromones into small plastic tubes and hang them on branches to form a labyrinth full of the smell of "beauty" in the orchard to attract males. But when the male comes, the female cannot be found in the maze and cannot mate, so the offspring are reduced and the population density is reduced. This small plastic tube is called an isotropic disperser. This technology has the advantages of strong specificity, low toxicity to human beings and animals, no contact with fruits, no environmental pollution and no harm to natural enemies.

Simple operation and long lasting effect

The appropriate time for prevention and control is very important.

So, how to use this isotropic disperser? Under normal circumstances, the duration of isotropic disperser in the field is about 6 months, and it only needs to be suspended once in a growing season. Each hanging 40 trees per mu, according to the average number of fruit trees per mu cross hanging, but also according to the actual population density in the orchard, the number of hanging corresponding increase or decrease, but the number of hanging not less than 35 per mu. Note that at the outer boundary of the entire prevention and control zone, 2-4 rows of trees (adjusted according to the size of the plot) should be doubly suspended at the edge of the higher slope and the main wind direction. In addition, it is very important to use isotropic disperser to control pear heart borer. It should be used before the emergence of overwintering adults and when the population density is low, until the end of the emergence of the third generation adults, usually from April to September in Beijing area. The application area of isotropic disperser should be more than 50 mu, and the larger the area, the better the effect.

Use isotropic spreaders

The amount of pesticide in peach orchard has been greatly reduced.

After several years of investigation and research, it is found that the disorientation rate of sex pheromone technology to adults of each generation of pear borer is 84.6%, 100%, 77.78%, 92.31% and 83.33%, respectively, that is, the rate of fruit decay can be controlled within 1%, and the orchard reduces the use of pesticides twice in the whole year. Therefore, the use of isotropy technique can effectively interfere with the mating of pear heart borer, reduce the population number of offspring, thus reduce its damage, increase the yield of big peach, improve fruit quality, and recover the loss to fruit growers. Applied pheromone isotropy technology can reduce the use of chemical pesticides for 3 times per mu and reduce the pollution to the environment. Hanging isotropic hair spreader, each person can complete 30 mu per day; spraying chemical pesticide, each person can complete 5 mu per day, which can save labor cost while reducing medicine.

Related links

What are the green control techniques in the whole process of big peach?

Around the Ministry of Agriculture's "Zero growth Action Plan for Pesticide use in 2020", Beijing Plant Protection Station and Pinggu District Plant Protection Station have carried out a series of research and application work on green prevention and control of peach diseases and insect pests, such as: growing grass in orchards and attracting natural enemies; physical and chemical trapping technology, solar energy insecticidal lamp, hanging yellow board, sex trap; physical control technology, fruit bagging; releasing natural enemies in the field to control harmful mites. Biological agents were used to control pests, matrine and berberine were used to control aphids and berberine to control peach brown rot. Finally, the green prevention and control technical model of peach diseases and insect pests in Pinggu District was formed, which was Qingyuan control + "color, light and sex" three inducements + fruit bagging + protection and utilization of natural enemies + scientific use of pesticides, which reduced the amount of chemical pesticides and provided a guarantee for the quality and safety of fruits in Beijing.