What are the specific effective drugs for apple anthracnose leaf blight?

Apple anthracnose fungal leaf blight mainly damages leaves and causes massive defoliation. Among them, Gala, Golden Delicious and Jonagold varieties have a higher damage rate, while Fuji, Red Star and other varieties are highly resistant to the disease. So, what are the specific effective drugs for apple anthracnose leaf blight?

1. Specific effective drugs for apple anthracnose leaf blight

Currently, the agents effective against apple anthracnose leaf blight mainly include: pyraclostrobin, prochloraz, dithianon (risky for early-maturing varieties such as Gala), bromothalonil and other chemical agents, as well as bio-based preparations such as polyoxin, kasugamycin and ethylicin (bio-based preparations alone are not very effective and need to be used in combination with chemical preparations). In addition, when spraying, make sure both the leaf surface and the fruit are evenly covered with the spray. At the same time, the higher the degree of atomization of the spray liquid, the better the control effect.

2. Prevention methods for apple anthracnose leaf blight

1. Choose resistant varieties

When establishing a new orchard, try to choose fruit tree varieties that are not easily susceptible to the disease. And practice ridge cultivation.

2. Prevent the spread and diffusion of the pathogen

Thoroughly clean up the orchard, sweep up residual branches and fallen leaves, scrape off pathogens on branches and destroy them. Spray functional liquid fertilizer to strengthen tree vigor and improve the tree's disease resistance.

3. Eliminate overwintering pathogens

For orchards with massive defoliation in October, spray once with 100-200 times copper sulfate solution + 800-1200 times Woye solution; before apple budding in April of the following year, spray again with 100-200 times copper sulfate solution + 800-1200 times Woye solution, or other eradicants with strong killing power, in order to eliminate the pathogens overwintering on branches and dormant buds.

4. Use drugs during the growth stage

1) Half a month before budding: use 60-100 times Kuifuling solution + organic silicon for a whole-orchard spray to kill pathogens and nourish the tree.

2) Flowering and leaf-unfolding stage: use 300 times Lianguoan + 600 times Wofengsu + organic silicon and spray 2 times, with an interval of 10 days each time. (Protect flowers)

3) First physiological fruit drop stage: use 300-500 times Lianguoan + 600 times Wofengsu + organic silicon and spray. (Protect fruit)

4) Fruit growth stage: use 300-500 times Lianguoan + 1000 times garlic oil + 600 times Wofengsu + organic silicon for regular spraying, basically with an interval of 10-15 days each time.

5) After fruit harvest in autumn: use 200-300 times Kuifuling + 600 times Wofengsu + organic silicon and spray once.

6) After 2/3 of the leaves have fallen: use 60-100 times Kuifuling solution + organic silicon for a whole-orchard spray to kill pathogens and nourish the tree.

5. Growing grass in the orchard

Improve the fruit tree growing environment. Enhance the disease resistance of the fruit trees.

6. Orchard drainage

During the rainy season, the orchard should be drained to prevent rainwater from accumulating in the orchard for a long time.

7. Cover with plastic film

Prevent pathogen-carrying rainwater from splashing up from the ground, and it also helps with orchard drainage.

Apple anthracnose leaf blight can be prevented, so fellow farmers should do the relevant management work well during the planting process.