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Symptom Identification and Control Methods for Azalea Leaf Gall
Symptoms: Azalea leaf gall, also known as cookie disease. The young tissues of azaleas can all be affected, mainly damaging flower buds, young leaves and new shoots. On the upper surface of the leaves, initially pale yellow semi-transparent round spots appear, later turning yellow and sunken; the underside of the leaves is pale red, thickened and swollen, subsequently raised into galls, with a thick grayish-white powdery layer on the gall surface, like a cookie, and the leaves wither, yellow and fall early. In severe cases, the petiole lesions merge into patches, deformed and thickened. When young shoots are affected, fleshy lotus-like leaves or tumor-like leaves are produced at the tips, later shrinking into sac-like forms. After the petals are infected, they become abnormally thickened, forming irregular galls.
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New red-leaf peach series cultivars, good for both ornamental viewing and eating
Ma Yuxi, a senior engineer at the Zhonghua Winter-Ripening Fruit Tree Research Center in Xun County, Henan Province (telephone: 0392-5811384), after 10 years of arduous exploration, finally bred 12 new red-leaf peach series cultivars with different colors and flower types, which both delight the eye and let people enjoy delicious fruit. After spring returns to the earth, this peach can first be enjoyed for its peach blossoms, then for its red peach leaves, third for the red fruit hanging all over the branches, and finally people can also eat sweet, large fresh peaches. For the red-leaf peach series cultivars, the flower buds begin to swell and the leaf buds begin to sprout in early March, and flowering begins in early April
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Introduction to the Red-Leaf Winter Peach Variety and Its Main Characteristics
In the northern Henan region of Henan, the Red-Leaf Winter Peach shows pink buds on March 25, begins blooming on April 1, with pink flowers, 5 petals, a flower diameter of 3.5-4 cm, and a blooming period of 7-10 days. The flowers and leaves grow simultaneously; the pink peach blossoms and purplish-red peach leaves become the only red landscape worth viewing in spring. As the seasons and temperatures change, the purplish-red peach leaves gradually turn copper-green from the base upward, but the new shoots and new leaves at the top remain purplish-red, forming on the same branch lower leaves that are copper-green and upper leaves that are still red.
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Detailed Explanation of the Key Cultivation Techniques for Nine-Leaf Green Sichuan Pepper
Nine-leaf green Sichuan pepper (Zanthoxylum armatum var. novemfolius) belongs to the Rutaceae family and is a widely used spice and oilseed tree species. Through demonstration and promotion in Daying County, Sichuan in recent years, it has been proven that this pepper tree has the characteristics of wide adaptability, fast growth, early fruiting, and simple cultivation and management. I. Advantages of This Product 1. Wide range of uses. This variety is superior to similar varieties and enters the fresh pepper market 40 days earlier, with the characteristics of high quality, good taste, and strong aroma. Vigorously planting nine-leaf green Sichuan pepper can improve the ecological environment, provide people with more abundant seasonings, and also provide high-quality raw materials for the pharmaceutical and chemical industries.
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What are the control methods for leaf diseases of hot peppers?
The main leaf diseases of hot peppers include anthracnose, brown spot, bacterial leaf spot, and gray leaf spot. These diseases can occur alone or together, among which bacterial leaf spot is more severe, often causing early leaf drop or even complete defoliation, greatly affecting the yield and quality of hot peppers. It is currently the rainy season, and the high-temperature, high-humidity climate conditions favor the occurrence of leaf diseases in hot peppers. Control measures: 1. Agricultural measures: After rain or irrigation, carry out timely intertillage to reduce soil moisture. 2. Use 77% Kocide at 500 times dilution (used alone
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How to control the tea green leafhopper? Efficacy trial of 10% imidaclothiz wettable powder
Abstract of the efficacy trial of 10% imidaclothiz wettable powder against the tea green leafhopper: Field trials showed that 10% imidaclothiz wettable powder has good control efficacy against the tea green leafhopper, and the control efficacy of the 3000-4000x dilution still reached above 80% at 14 d after treatment. Keywords: imidaclothiz; tea green leafhopper; control efficacy. 10% imidaclothiz wettable powder is a nitromethylene systemic insecticide. The mechanism of action of imidaclothiz is to selectively inhibit the nicotinic acetylcholine esterase receptor in the insect nervous system, binding with extremely high competitiveness, thereby disrupting normal conduction in the central nervous system.
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Processing Methods and Technical Key Points of Goji Leaf Health Tea
Goji leaves are rich in betaine, rutin, and various amino acids and trace elements. Goji leaf tea has health benefits such as nourishing the liver and improving eyesight, and softening blood vessels. Its processing method is as follows: 1. Leaf picking. Pick fresh goji leaves that are tender green in color, free of pests and diseases, and thick and plump. Wash off dust and other dirt from the leaf surfaces with clean water. After draining the water, spread them evenly in a ventilated and dry place for 3 to 4 hours. During the spreading and airing period, turn them 1 to 2 times until the leaves become limp. 2. Fixation. Place the wok used for fixation on a stove built at a 35-degree
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Causes of Leaf Drop in Golden Privet During the Growing Season and Solutions
Golden privet (Ligustrum × vicaryi) is an excellent colorful shrub. In practical cultivation in some places, during the growing season its leaves, especially new leaves, successively develop spots, which then progress to drying up, leaf drop, and the branches gradually die back from top to bottom, with a small portion dying. According to surveys, the deaths mostly occur in the middle of the planting plots, while the plants around the edges grow well. The causes are mainly the following two aspects. 1. Caused by disease. The cause of this condition is golden privet leaf spot disease. Leaf spot disease is caused by pathogenic fungi. In the early stage of the disease, brown
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Golden Privet: Introduction to a New Colorful-Leaf Plant Variety
Golden Privet: also known as Howard's privet, Ligustrum japonicum 'Howardii', a new colorful-leaf variety in the Japanese privet series. Evergreen shrub or small tree; leaves leathery, thick, with a fleshy feel; new leaves in spring are bright yellow, turning golden yellow by winter, and some new leaves have cloud-like light green patches along both sides of the midrib or locally on one side, with bright and pleasing colors; internodes short, branches and leaves dense. The original species is distributed from west of Kanto in Japan, Honshu, Shikoku, Kyushu, and Taiwan, China. It likes light, is drought-tolerant and cold-tolerant, and can grow in acidic,
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Detailed Explanation of Key Technical Points for Pest and Disease Control in Large-Leaf Privet
Large-leaf privet (Ligustrum lucidum) has strong adaptability and is basically free of pests and diseases; only when its growth is too weak will scale insect damage occur. Control methods: 1. Use a grass bundle or brush to wipe and brush off the overwintering female insects on the trunk and branches and the male pupae inside the cocoons. 2. In May and June, spray for control with 50% malathion 600 times dilution, or 25% imidan 1000-1500 times dilution, or 40% dimethoate emulsifiable concentrate 1000 times dilution, or 10% fenbutatin oxide 400 times dilution.
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