Summer and autumn parsley should be "four defenses"

Coriander, not resistant to high temperatures, like a cool climate, planted in the hot and rainy summer and autumn seasons, prone to convulsions, "red stalks", rotten hearts and other issues, therefore, we must strictly guard against.

The coriander that is planted in the open field in summer and autumn is not convulsed because of the low temperature in the seedling stage, but it will be twitched due to the long-term sunshine (conditions) in summer and autumn. This requires the selection of coriander-resistant coriander varieties in production. In addition, strengthen the management of fertilizer and water (the whole growth period of coriander should be poured 5 to 7 times, the first three waters, once every 10 days, every 6 to 7 days from the fourth water. When pouring water, lightly pick up Miao fertilizer, about 10 kg of urea per acre, after each pouring 2 to 3 times of water to catch a urea, 10 to 12.5 kg per acre), can also reduce the occurrence of convulsions.

Anti-"red stalk" Coriander "red stalk", that is, the stem and leaf parts of coriander changed from green to red, reducing the commercial value of coriander, and the purchase price was halved. The coriander grown in the open field in summer and autumn will be reddened by strong light, especially when the seedlings are too late (plant height exceeds 8 cm). In order to prevent the emergence of "red stalks" in coriander, first, morning seedlings, in the production, seedlings up to 3 cm high seedlings should be suitable, and keep the plant spacing after seedlings at about 2 cm; second, cover the shade net, conditional Farmers can take a scaffolding of 80-100 cm high after sowing, and the shed is covered with a layer of shade net.

The rain-proof summer and autumn seasons have more rain, which is very harmful to the coriander seedlings just after emergence. After the heavy rain, it will suddenly turn fine, which will easily lead to the bad heart of the parsley. After the rain, lightly pour the well water, the amount is not to submerge the seedlings, it can prevent the coriander from being bad.

Prevention of pests and diseases Because of the spicy flavor of coriander, few insect pests occur. The main diseases are seedling stage collapse, adult stage viral disease, anthracnose and spot blotch. 5 days after emergence, spray once with 3% polychlortetracycline 800 times solution of non-polluting fungicide, and then spray once every 7 days with 600 times of doxorubicin for 2 to 3 times to prevent tripping. The disease can prevent anthracnose and spot blight. If a viral disease occurs, it can be sprayed with a non-polluting fungicide potassium permanganate 800 times solution or a virus K1000 times solution.

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February 20, 2020