Control methods of Diseases and insect pests of Apple in different growth periods

What are the diseases and insect pests of apples in different growth periods? What is the method of prevention and control? Below, the editor of Tuliu.com will give you a detailed answer.

1. March to early April (before germination)

Pay attention to apple tree rot, branch ring disease, dry rot, overwintering pests, leaf mites. Combined with pruning and scraping to remove rotting scars and ring disease tumors. Rough bark, cut off the dead branches of thousand-rot disease, scrape off the bark of thousands of trees and hidden overwintering pests, take them out of the garden and burn them. After scraping or scratching, the disease scar is smeared with 40 times bacteriorubicin or 50 times good moisture, and the whole tree is sprayed with 3 to 5 degrees stone sulfur mixture or 21% peracetic acid 200x or 43% Hollick 1000 times and so on.

February and late April (before flowering)

Pay attention to diseases such as powdery mildew, leaf-eating pests and aphids, spray 70% promethrin 700x, Zhixin high boron 1500 times. 2.5% deltamethrin 2000 times, or 40% closed oil emulsion 400x.

Late April to early May (florescence)

Pay attention to the prevention and treatment of mildew heart disease and beetles. 70% propionate zinc 700x. 70% methyl thiophanate 1000 times, Zhixin high boron 1500 times. 2.5% kungfu 2000 times. In orchards with heavy occurrence of beetles, chemical control, artificial control or frequency vibration insecticidal lamp can be used to trap and kill adults.

April and late May (7 to 10 days after falling flowers)

Pay attention to the prevention and treatment of wheel rot and mildew. Early deciduous disease, bitter pox, leaf mites, tumor aphids, yellow aphids, cotton aphids and caterpillars. Spray 70% propionate zinc 700x. 24% snail fat 4000 times (adult base high plus 1.8avermectin 4000 times). 2.5% deltamethrin 2000 times, Zhixin high calcium 1500 times. The cotton aphid with a higher base was sprayed 1500 times with 30% chlorpyrifos emulsion.

May and early June (20 days after falling flowers)

Pay attention to the control of fruit rot, black spot, bitter pox and leaf diseases, as well as peach heart borer unearthed larvae. Choose 80% mancozeb 600x, or 70% methyl thiophanate 1000 times. 2.5% deltamethrin 2000 times, Zhixin high calcium 1500 times. According to the forecast, when the male moth is continuously attracted, the ground under the crown is sprayed 500 times with 48% chlorpyrifos. Pay attention to the application of calcium fertilizer underground.

Late June (young fruit stage)

Mainly control wheel rot, leaf diseases and bitter pox diseases, Spodoptera litura, yellow aphid leaf mites. Choose 70% propionate zinc 700 times. 80% mancozeb 600 times. 70% thiophanate methyl 1000 times. 80% carbendazim 800 times, Zhixin high calcium 1500 times. 0.5% methamidazole salt 1500 times or 25% thiazuron 3 2000 times mixed with 10% imidacloprid 3000 times or 3% acetamiprid 2000 times.

July and July

1. Control fruit rot and leaf spot in the first ten days of July. Peach heart borer, leaf curler and other pests. Choose excess Bordeaux solution 200 times or 70% Bordeaux powder 800 times. According to the forecast, when the egg rate reaches 1%, tree control is carried out, with 2.5% deltamethrin 2000 times or 4.5% cypermethrin 2000 times.

2. Continue to control fruit rot, leaf diseases, leaf rollers and leaf mites in the middle and late July. Spray excess Bordeaux solution 200x or 70% Bordeaux powder 800x, 24% spirochete 4000 times mixed with 1.8% avermectin 3000 times (spirochete fat is not easy to decompose in the presence of alkali and lasts for more than 45 days).

August and August

In the first ten days of August, we should pay attention to the diseases such as fruit rot, golden grain, leaf curl and two spots. Spray 43% tebuconazole 6000 times, 70% propionate zinc 700 times. 2.5% deltamethrin 2000 times. 5% boll urea 2000 times and other agents. The occurrence of Tetranychus urticae mites can be controlled by the combination of tetramazine and avermectin (no mites will occur if mite is sprayed in mid-late July). Pay attention to the supplement of phosphorus, potassium, boron and calcium.

2. Pay attention to fruit rot, mildew, fly feces and other diseases in late August. Apply 1000 times of 70% thiophanate or 70% of promethazine and 2000 times of methylovir salt.

9. Before fruit harvest (after bagging fruit)

Pay attention to diseases such as fruit rot, coal pollution, fly feces, bitter pox and so on. Spray 43% tebuconazole 4000 times, Zhixin fruit Sheng 1000 times, Zhixin high calcium 1500 times (note: it is best not to use powder pesticides before harvest, so as not to pollute the fruit surface).

After picking the fruit

Control all kinds of overwintering diseases and pests and clean the orchard in time and remove the dead branches and leaves. White the trunk, turn the orchard deeply, cover the grass and irrigate.