Pear psyllids are a common pest that has a significant impact on the growth and yield of pear trees. In order to effectively control pear psyllid, we need to have a comprehensive understanding of its biological characteristics, occurrence rules and control methods.
First, let's take a look at the biology of the pear psyllid. The pear psyllid is a small pest that lives on the branches, leaves, and fruits of pear trees in the form of adults and nymphs. They have a life cycle of about 30 days and can occur in multiple generations per year. Adults usually overwinter in secluded places and begin to move in the spring when temperatures rise and lay eggs on the young leaves, buds and fruits of pear trees. After hatching, the nymphs will suck the sap of the pear tree, causing the leaves to lose green, turn yellow, fall off, and even cause the tree to die in severe cases.
Next, let's analyze the occurrence law of pear psyllid. The occurrence of pear psyllids is closely related to climatic conditions. The warm and humid environment in spring is conducive to the reproduction of adults and the growth and development of nymphs. In addition, poorly managed and weakened pear trees are also prone to pear psyllids. In North China, the peak breeding period of pear psyllid is usually from April to June, which is also a critical period for control.
In order to effectively control pear psyllid, we need to take a series of measures. First and foremost, strengthening orchard management is key. Reasonable fertilization, watering, pruning, and enhancing the tree's vigor can improve the resistance of pear trees to pear psyllids. Secondly, biological control is also an important tool. The protection and use of natural enemy insects, such as lacewings, ladybugs, etc., can effectively control pear psyllids. In addition, chemical control is also an essential measure. During the peak breeding period of pear psyllid, some systemic insecticides can be used for spray control. It should be noted that pesticides with low toxicity and low residue should be selected to avoid harm to the environment and the human body.
Resistant scale insects, pear psyllids, psyllid solutions:
(33% spiro-thiazinone suspension + 5% avermectin microemulsion).
1. Snail ethyl ester causes the death of pests by interfering with the fat biosynthesis of insects, and is a special window acid systemic insecticide and acaricide, which is mainly gastric toxicity and can be conducted up and down in the plant after being absorbed by plants; thiazinone can inhibit the synthesis of chitin in insects and interfere with metabolism, resulting in the death of nymphs due to molting deformity or wing deformity, with strong contact killing effect and stomach toxicity; Avermectin has contact killing and gastric toxicity and has a weak fumigation effect, and the combination of the three has strong contact killing + gastric toxicity + strong systemic conduction.
2. Eggs, larvae, and adults are killed together, and three generations of worms are treated with one medicine.
3. Ternary combination application: good quick-acting contact killing, longer effective period of gastric toxicity + systemic absorption.
4. It can protect new stems, leaves and roots, and is highly safe for crops and environmentally friendly.
In addition to the above measures, we also need to pay attention to the following:
1.Inspect the orchard regularly, especially in spring and summer, focusing on new leaves and fruits for signs of pear psyllid. Once the presence of pear psyllids is found, control measures should be taken immediately.
2.In the process of prevention and control, it is necessary to pay attention to the safe use of pesticides. It is necessary not only to avoid harm to the human body, but also to avoid the killing effect on beneficial organisms. At the same time, it is necessary to use different types of pesticides in a reasonable rotation to avoid the development of resistance to pear psyllids.
3.For pear trees that have been damaged, pruning and cleaning should be carried out in time. Pruning the infested shoots and leaves and treating them intensively can reduce the breeding sites and numbers of pear psyllids. At the same time, fertilizer and water management should be strengthened to promote the recovery of tree potential.
4.For orchards that are difficult to manage, a combination of biological and agricultural control methods can be considered. For example, planting some plants in the orchard that repel pear psyllids, or whitening the trunk in winter, to improve the insect resistance of pear trees.
In summary, comprehensive measures are needed to control pear psyllid. By strengthening orchard management, biological control and chemical control, the harm of pear psyllids can be effectively controlled, and the healthy growth and yield of pear trees can be guaranteed. In practice, targeted prevention and control work should be carried out according to local climate, soil and tree species conditions to achieve the best control effect. At the same time, it is necessary to pay attention to the requirements of environmental protection and food safety, choose pesticides with low toxicity and low residues, and ensure the quality, safety and sustainable development of fruits. **10,000 Fans Incentive Plan