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How to prevent and control leaf blight in Schisandra chinensis? Practical tips shared
Leaf blight in Schisandra chinensis mostly occurs from late May to mid-July, with the lesions appearing scorched yellow. It initially starts at the leaf tip and gradually expands and spreads; in severe cases, the entire leaf turns yellow and dies. The disease is severe under high temperature and high humidity with poor ventilation. Control methods: spray with 400-500 times zineb and 1500 times thiophanate-methyl; it is best to spray once a week before the disease occurs, for 2-3 consecutive sprays, or use Bordeaux mixture sprayed once a day.
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Symptom Identification and Control Methods for Licorice Gray Leaf Spot
It damages the leaves, forming nearly round brown lesions with gray centers. Control methods: (1) Clear the garden in winter and dispose of plant debris. (2) During the disease period, spray 1:1:120 Bordeaux mixture or 70% thiophanate-methyl wettable powder at 1500-2000 times dilution.
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Effective control methods for leaf beetle pests on licorice
The main species of leaf beetles harming licorice include Diorhabda tarsalis, Pynrrhalta aenescens, Monolepta quadrigutdata, Diorhabda rybakowi, Ceytra sp., Colasposoma dauricum, Coptoc
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Large-scale leaf-rolling of the central leaves of rice may be related to excessive application of quinclorac
For some time recently, hundreds of readers across our province have called to report large-scale leaf-rolling of the central leaves of rice seedlings, which is even more common in direct-seeded rice production. Many readers brought in diseased plants. The root systems of the diseased plants are generally fairly normal, and there are no obvious disease spots or other symptoms on the leaves. After examining the submitted diseased plants, relevant experts from the Institute of Plant Protection of the Provincial Academy of Agricultural Sciences and other units preliminarily diagnosed that the leaf-rolling of the central leaves of rice is not caused by viruses or other pathogenic microorganisms, but may be phytotoxicity caused by herbicides such as 2,4-D and quinclorac, or may be caused by physiological
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How to prevent garlic clove degradation and leaf regrowth
When garlic grows to a certain stage, the scale buds begin to differentiate, the leaves degenerate, and the scale buds gradually form garlic cloves; the scales outside the degenerated scale buds form the outer skin of the garlic cloves. This is the general pattern of normal garlic growth. At the same time the garlic scape emerges, a ring of small garlic leaves grows around the scape, with 5-7 small leaves growing around the scape. These small leaves are a long new leaf that the outer skin of the new garlic clove sends out along the scape, while the growing point of the new garlic clove has not sprouted. This is called the garlic degenerated leaf regrowth phenomenon, sometimes called secondary
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Comprehensive Control Methods for Yellowing Garlic Leaf Tips in Autumn
Garlic planted in autumn is prone to leaf tip yellowing, which causes stunted stems and leaves, thin stalks, low yield and poor quality. 1. Causes 1. Low soil fertility and insufficient nutrient supply in the later stage. 2. Too high temperatures in the later stage and insufficient water supply. 3. Continuous cropping year after year and excessive density. 4. Severe damage from leaf spot, anthracnose, aphids, red spiders, etc. 2. Control measures 1. Choose loose sandy loam with relatively high fertility, and before planting apply farmyard manure at 4000 kg per 667 sq m.
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Remedies for yellowing garlic leaf tips in autumn
In autumn, garlic plants easily develop yellowing leaf tips, which stunts the growth of stems and leaves, keeps the stalks thin, and leads to low yield and poor quality, so cultivation management must be strengthened. Rational fertilization: during the growth period of autumn garlic, a root fertilizer must be applied every 15-20 days, mainly high-quality organic fertilizer; each time apply 0.5-1 kg of composted and fully rotted peanut cake fertilizer per sq m of garlic plot, mixed with 10-15 kg of clean water or composted and fully rotted human and livestock manure water, then pour it on. At the same time, every 10-15 days spray the leaves once with an 800-fold dilution of the vegetable-specific Gaomeishi organic humic
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How to Make Black Jujube Leaf Tea: Method and Detailed Steps
Black jujube leaf tea is rich in vitamin C, amino acids, flavonoids and other components beneficial to the human body, and drinking it regularly is good for your health. The specific production process is as follows: 1. Leaf picking and handling: The best time to pick leaves is from July to October, choosing fresh leaves free of pests and diseases. After the leaves are picked, they should be spread out to air in a ventilated indoor spot to promote the formation of amino acids in the leaves; after airing for one hour, cut the leaves crosswise into pieces of uniform size. 2. Fixing: The purpose is to use high temperature to destroy the activity of enzymes in the fresh leaves and prevent the vitamin C and other components in the leaves from
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How to control leaf spot disease in hydrangea (Impatiens)
[Alias] Impatiens brown spot disease. Hydrangea leaf spot is one of the common diseases on hydrangea. [Distribution] Sichuan, Henan, Guangdong, Taiwan, China, Jilin, Shanghai, Zhejiang, Hunan and other places. [Symptoms] The disease mainly occurs on leaves. Leaf spots initially appear as light yellowish-brown water-soaked small dots, then expand into circular or nearly circular shapes, 2-5 mm in diameter, with a maximum of about 15 mm. Later the center becomes light brown, the edge dark brown, slightly raised, with inconspicuous concentric rings, and black small dots, which are the fungus's pycnidia, are produced on the diseased area. In severely infected
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Detailed Guide to Large-Leaf Goji Berry Cultivation: Master the Method and Grow Goji Berries Well
I. Large-leaf goji berry (Lycium chinense) has strong adaptability to the environment and can be cultivated in both northern and southern China. The optimal growing temperature is 15-25°C. In South China, cultivation is mainly in autumn and winter; when temperatures rise above 25°C, growth suffers and leaves quickly drop, with new growth only resuming in autumn. However, in North China, it can still grow during the hot, rainy summer season when temperatures exceed 30°C, and it is also very cold-hardy. After the aboveground branches drop their leaves in late autumn and early winter, even though winter temperatures sometimes drop below -10°C, it can still sprout and grow the following spring. Goji berry is also shade-tolerant and grows best in calcareous soil.
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