The leaves of the hawthorn tree are rolled with white insect eggs, what to do with the leaves with i

The leaves of the hawthorn tree are covered with white eggs, which are undoubtedly infested by pests and diseases. Therefore, at this time, we should find a way to spray some insecticide drugs, so that after killing the eggs, the hawthorn tree can grow and develop normally, and the leaves can return to normal, which is conducive to the growth and development of the fruit, and is very helpful for improving the quality of the fruit.

The reason why the leaves of the hawthorn tree are curled.

During the maintenance period of hawthorn trees, the demand for fertilizer is high, and sufficient fertilizer is conducive to the growth of hawthorn tree branches and leaves. During the growth period, hawthorn trees lack potassium, and the leaves appear yellow, scorched, and curled. If the hawthorn tree lacks fertilizer, it needs to be supplemented with fertilizer in time, and the fertilizer is mainly rich in nitrogen, phosphorus and potassium.

During the growth period of the hawthorn tree, it needs to have sufficient light, which can allow the hawthorn tree to accumulate nutrients. During the maintenance period, the hawthorn tree is exposed to insufficient light, the branches and leaves grow poorly, and the leaves will curl and turn yellow. If it is caused by insufficient light, it is necessary to give the hawthorn tree enough light so that it can grow normally in the later stage.

Hawthorn trees are not tolerant to waterlogging, but they need to be well hydrated during the growing period. During the maintenance period, the hawthorn tree lacks water, the branches and leaves grow poorly, and the leaves appear yellow, dry, curled and wilted. If it is caused by insufficient water, it is necessary to water the hawthorn tree in time to replenish its water, and adjust the watering method in the later stage.

What is the reason for the hawthorn tree leaf roll.

During the growth period of hawthorn trees, if the environment is not suitable or not properly maintained, it will induce pests and diseases. When hawthorn trees are infested by pests and diseases, their growth deteriorates, and their leaves wilt, curl and turn yellow. If it is caused by pests and diseases, it is necessary to cut off the leaves of the diseased branches and insects, burn them, and spray the hawthorn tree with relevant chemicals after pruning to control the insects and diseases.

Hawthorn leaves have bugs, and the treatment method is different.

According to the characteristics of the hazard, determine the species of fruit boring pests, formulate corresponding prevention and control measures according to the overwintering place and occurrence law, and focus on the use of drugs during the critical period of prevention and control. Prevention can be selected in the process of cultivation management, strengthen management, or apply fertile leaf water-soluble fertilizer.

1. Peach heartworm.

1.Turning the tree tray After fruit picking, combined with the application of basal fertilizer, the tree turning tray can expose part of the overwintering larvae to the ground, and low temperature and drought can kill the part of the overwintering larvae. In the mountains and river flats with thin soil layer, the orchard with conditions can cover the mountain with 10 15cm of soil near the trunk (about 1m) in spring, which can not only increase the thickness of the soil layer and improve the soil nutrient status, but also suffocate most of the overwintering larvae.

2. Before the overwintering larvae are unearthed, sprinkle phosphine particles (2 3kg 667m2) within 1m from the main trunk, and rake them back and forth several times after sprinkling, with a depth of 10cm, so that the phosphine and the soil are fully in contact and can touch and kill the unearthed larvae.

3. Spraying on the tree is used in the peak period of adult oviposition (late July), and the effective agent can choose pyrethroid insecticides and imidacloprid, and the spraying should be meticulous and thoughtful, so that the entire fruit surface is covered with droplets. If the orchard has a serious occurrence, it will be sprayed once about 10 days in advance, and the control effect will be more ideal. It should also be noted that the spraying time should not be delayed for too long, and the whole park should complete the prevention and control in 7 days, so as not to miss the best prevention and control time.

Second, the white heartworm.

1. Scrape off the old warp bark and clean the orchard Completely scrape the old warp bark before germination and destroy it centrally, and clean up the fallen leaves, fallen fruits and weeds in the garden after the fruit is harvested, and burn it intensively to eliminate some overwintering larvae.

2. Pesticide prevention and control of early spring larvae stinging and oviposition peak of each generation, spray 1 2 times according to the amount of eggs. Choose imidacloprid and pyrethroid pesticides.

3. Removal of insect fruits In the orchard with a short tree body, timely removal of insect fruits and centralized destruction can reduce the insect population density in the next year.

3. Pear heartworms.

1. Clean the orchard and scrape off the old warped bark After picking the fruit, clean the fallen leaves and weeds in the orchard, and carefully scrape the old warped bark on the main trunk and main branches before the hawthorn tree sprouts, and burn it intensively to eliminate some overwintering larvae.

2. Removal of insect fruit 6 July, there are fewer pear heartworms that harm hawthorn, and the pest fruit can be manually removed to reduce the source of insects and reduce the harm of the next generation.

3. Pesticide prevention and control of imidacloprid and pyrethroid pesticides on trees at the peak of egg occurrence have good control effects. 1 spray after 10 days of severe orchard occurrence.