What are the pest control techniques and natural disasters in April apple orchard?

In April, Grain Rain Company was in the Qingming Festival. The budding flowers in the garden consume a lot of nutrients, and the resistance to adversity greatly reduces the growth and pests of fruit trees. Before preventing diseases and insect pests, we should spread flowers, pollinate and set fruits well, and prevent natural disasters (wind, rain, frost and cold) as early as possible to ensure high yield.

1. What are the main pests and diseases of apples before and after flowering?

The main diseases in this period are apple rot, dry rot, branch rot, mottled defoliation, powdery mildew, mold heart disease, rust and so on. The main pests are apple scarab, tumor aphid, cotton aphid, tetranychus urticae, leaf miner, leaf roller moth, corn borer and so on.

2. Why do you need pest control before flowering?

In spring, with the increase of temperature, fruit trees change from dormancy to growth. At the same time, all kinds of overwintering pests and diseases have also been released from dormancy, and quickly emerged, propagated, infected and spread. Avoid using drugs on trees during flowering, so you must spray drugs before flowering. In addition, it is very important to spray dry branches before germination. It is very important to eradicate the sources of overwintering bacteria and insects, reduce the base of early pests and diseases, and strive to actively control pests and diseases throughout the year. Therefore, it is necessary to emphasize spraying drugs before flowering.

3. What chemicals should be used to control pests and diseases before the orchard blooms?

The systemic broad-spectrum bactericide is selected for disease prevention, such as American Fuxing 8000 times solution, or "Tianda 21kloc-0/6" fruit tree special 800 times solution+Tianda Yufeng 1500 times solution; The pesticide is 0/.500 times of diuron/kloc-0, or 2,000 times of Wankunjing, or 0/.000 times of Lysimachia christinae/kloc-0; 2% Tiandabamectin can be used as acaricide. The artificial vibration of scarab and the trapping of branches of poplar, willow and elm soaked in 50 times omethoate at night under the tree.

4. Why is the flowering period of the orchard "ten years and nine disasters"?

The weather is changeable. In the long-term practice, it is found that apple often encounters bad weather conditions during flowering, which leads to a reduction in orchard production and a bumper harvest. In recent 20 years, it occurred in most years under the conditions of strong wind, dry hot wind, low temperature, rainy weather, late frost or low temperature freezing injury, which had a great impact on apple yield. Therefore, it is not an exaggeration to say that the flowering period of apple is "nine disasters in ten years", and preventing natural disasters in flowering period is a main task of apple production.

5. How to prevent late frost and low temperature freezing injury in flowering period?

First of all, we should strengthen the cultivation management, strengthen the tree potential and improve the stress resistance of fruit trees; The second is to water in time and postpone the flowering period; Third, when the weather forecast has frost, light a fire around the orchard a few hours before frost, or spray water in the garden until dawn; Fourth, spray 200-300 times of "Tianda 2 1 16" plant cell membrane stabilizer on trees before flowering, and use high-tech products to improve the stress resistance of trees and reduce or prevent disasters. At the same time, "Tianda 2 1 16" also has the function of accelerating the discoloration of spreading leaves, improving the fruit setting rate and promoting the rapid development of young fruits.