Comprehensive control of tip yellowing of garlic leaves in autumn
Planting garlic in autumn is prone to leaf tip yellowing, resulting in short stems and leaves, not thick stems, low yield and poor quality.
I. the cause of the disease
1. The soil fertility was low and the nutrient supply was insufficient in the later stage.
two。 In the later stage, the temperature was too high and the water supply was insufficient.
3. Year after year, the density is too high.
4. It is seriously damaged by leaf spot, anthrax, aphids, red spiders and so on.
II. Prevention and control measures
1. The sandy loam with loose soil and high fertility was selected and 4000 kg of farm manure was applied before planting.
two。 40000 seedlings were planted according to plant spacing of 8 cm, large row spacing of 20 cm and small row spacing of 6 cm.
3. 100 kg of plant ash was sprayed on 667 square meters at seedling stage, which not only prevented the dry and cracked soil and garlic root, but also increased the application of potassium fertilizer.
4. Ploughing and loosening soil in early spring, preserving soil moisture and weeding for 3 times.
5. Grasp the soil moisture during the growing period of garlic seedlings, maintain the maximum field capacity of 60% to 70%, the soil is too dry and wet is easy to produce yellow leaf dry tip phenomenon.
6. In the early stage of garlic seedling growth, regular foliar spraying of Kangkuning, Phytophthora, potassium dihydrogen phosphate and so on to improve stress resistance.
7. Spraying clear water or 150 mg / kg sodium bisulfite in the morning and evening can inhibit plant nutrient consumption, reduce leaf water evaporation, alleviate the harm of dry and hot wind, and delay leaf yellowing and plant premature senescence.
8. Autumn garlic is seriously harmed by leaf spot, anthracnose, aphids and red spiders, causing leaf tip yellowing. It is appropriate to spray the mixture of 1000 foliage and thiophanate every 15 to 20 days, or to spray the leaves to dripping water with the mixture of 25 foliar calcium superphosphate and dry and pure plant ash, or 1500 foliar Lubao and 600xone.
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Cultivation Techniques of Autumn Garlic
Garlic is a perennial perennial root plant of Liliaceae. Its garlic sprouts, garlic stems and leaves and garlic heads can be eaten. It has high edible value and medicinal value. It is a treasure among vegetables. Autumn garlic should pay attention to the following points: First, fine soil preparation garlic planting with deep soil layer, fertile, loose, good drainage sandy soil is appropriate. General deep ploughing 15 to 20 cm, combined with deep ploughing mu fertilizer 1000 to 1500 kg as base fertilizer, turning and crushing soil, build about 2 meters wide ridge, dig drainage ditch, ridge surface to keep flat, loose
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Remedial methods for the yellowing of garlic leaves in autumn
In autumn, planting garlic is prone to leaf tip yellowing, so that the stem and leaf is not long, the stem is not thick, the yield is low and the quality is poor, so it is necessary to strengthen the cultivation management. Rational fertilization during the growth period of autumn garlic, fertilizer must be applied to the roots every 15 to 20 days, mainly high-quality organic fertilizer, 0.5 kilogram of rotten peanut cake fertilizer per square meter of garlic field, 10 kilograms of rotten human and animal manure mixed with water or retting water and then drenched. At the same time, 800 times vegetable special type Gaomeishi organic humus was sprayed on leaves every 10 to 15 days.
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