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Golden-leaf dawn redwood is a new and superior colored-leaf tree species
Dawn redwood (Metasequoia glyptostroboides) is the only surviving species of the genus Metasequoia in the family Cupressaceae. This species was once thought to be extinct, until it was discovered in 1941 in the Lichuan area of Hubei, China, and afterwards this plant was also found successively in the Wanxian area of Sichuan. In 1947, dawn redwood seeds were introduced to the Arnold Arboretum in the United States, and from there spread to botanical gardens around the world. In 1948, "dawn redwood" and its scientific name were formally named, and since then it has enjoyed great fame in China and even the whole
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Symptoms and Control Methods of Spruce Leaf Rust
Spruce leaf rust is distributed in Sichuan, Yunnan, Gansu, Qinghai, **, Taiwan, China and other places. The disease damages Picea likiangensis, Picea asperata, Picea crassifolia, Picea brachytyla var. complanata, Picea linzhiensis, Picea schrenkiana and Picea obovata, etc. Symptoms: When buds are infected, the needles on the newly grown tender shoots turn yellow or orange-yellow, short and thick; orange-yellow cushion-like telia or blister-like aecia are produced on the diseased leaves; the diseased buds resemble a yellow flower, and soon the diseased leaves turn black and die. On infected 2-year-old leaves, parts turn yellow, and blister-like aecia or orange-yellow cushion-like
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A Detailed Guide to the Harm Caused by the Jujube Leaf Beetle and Its Control Methods
The jujube leaf beetle belongs to the order Coleoptera, family Chrysomelidae. The larvae and adults of this insect damage jujube leaves and tender shoots. In outbreak years, the leaves are eaten bare, leaving only the bare fruiting branchlets, which greatly affects yield. The peak damage period for this insect is from mid-April to mid-May. Both larvae and adults damage jujube leaves, tender shoots, flower buds and flowers. Control methods: spraying mainly for flower protection is the primary approach. During the occurrence period of larvae and adults, spray 90% trichlorfon at 1500 times dilution or deltamethrin at 1.5 ten-thousand to 1.6 ten-thousand times dilution; generally the insecticidal effect is very good.
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Cotton red leaf blight is prone to outbreak after heavy rain, growers need to be vigilant
Recently, cotton regions have generally experienced heavy to torrential rain, and for cotton that has endured a long drought, red leaf blight is extremely prone to outbreak. Cotton red leaf blight is a physiological disease. It starts from the main stem growing point or the top of the fruiting branch, and generally develops from top to bottom and from outside to inside. The main stem withers and dies, but the dissected vascular bundles show no discoloration. The root system is thick and short, with few fibrous roots and poor development. The causes of cotton red leaf blight outbreaks are: first, extensive farming in cotton fields, resulting in poor cotton root development; second, cotton fields with poor drainage; third, excessive application of nitrogen fertilizer, vigorous cotton growth,
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What to Do About Brown Leaf Tips on Chinese Cymbidium Leaves? A Detailed Guide to Prevention and Treatment
Orchid leaves grow vigorously, green and sturdy, with graceful leaf posture and spirited form, delighting the eye. If the leaf tips are scorched and the leaves withered, covered in spots like patches of psoriasis, even a rare and extraordinary flower will be greatly diminished. To grow good orchid leaves, I made improvements in the following six areas. 1. The potting soil must be breathable, well-draining, and moisture-retentive. It should have good crumb structure, soft and loose, like a sponge, with medium fertility; leaf mold from the mountains or peat soil is best. If you cannot get these in the city, mix your own nutrient soil. The formulas are: (1) 8 parts spent mushroom substrate, half a part of honeycomb coal ash,
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Large-leaf parsley
Large-leaf parsley (Spuriopimpinella brachycarpa (Kom.) Kitagawa), also known as mountain parsley, false anise, Mingye vegetable (Anshan), spider fragrant (Jilin), and Channa Muer (Korean transliteration). It is a perennial herbaceous plant of the Umbelliferae family. It is mainly distributed in northeastern China and the Russian Far East. Its tender stems and leaves are edible, emerald green and juicy, fresh and refreshing in aroma, and rich in nutrients, making it one of the wild vegetables excellent in color, aroma, and taste. According to measurements by the Institute of Applied Ecology
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Rice seedlings turning yellow, leaves curling, leaf-rolling: what to do? A detailed guide to prevention and control
There are many causes of the rice leaf-rolling phenomenon, and the most common one is the rice leaf roller (Cnaphalocrocis medinalis). Damage characteristics: the larvae bind silk to roll rice leaves lengthwise into larval cases, and the larvae hide inside and feed on the mesophyll, leaving only the epidermis, forming white streaks, which reduces the 1000-grain weight of rice, increases empty grains, and causes yield loss. Control agents: 1. Select rice varieties resistant to (or tolerant of) the pest, fertilize reasonably, so that the rice grows and develops vigorously, and prevent excessive early growth and excessive tillering as well as late-season stay-green and delayed maturity. Manage water scientifically, adjust the drainage (field-drying) time appropriately, and reduce field humidity during the larval hatching period
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Detailed Explanation of the Processing Method and Production Steps of Persimmon Leaf Tea
Persimmon leaf tea is a new product of scientific research. It is not only very popular among domestic consumers, but is also exported to Japan. This is mainly because the leaves of persimmon trees and soft jujube trees have high nutritional value. Every 100 grams of fresh leaves contains about 100 mg of vitamin C, and if dried leaves, it is as high as 3500 mg; in addition, they also contain large amounts of rutin, carotene, choline, flavonoid glycosides, amino acids, etc., which can refresh the mind and improve eyesight, reduce inflammation and relieve fever, cool the blood, stop bleeding and lower blood pressure, and can also increase coronary blood flow in the heart, and have a certain effect on preventing and treating cancers of the digestive system. The production method of persimmon leaf tea is as follows:
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Loose leaf tea can be dried by sun-drying or oven-drying.
The use of tea began with chewing the fresh leaves of the tea plant, and later developed into boiling the fresh leaves into a soup-like drink; in both cases the fresh leaves of the tea plant were used directly. Before the Tang Dynasty, tea processing was relatively simple: the freshly picked leaves were sun-dried or oven-dried and then stored away. This was the budding stage of the sun-dried green tea process.
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The aliases of oleander are willow-leaf peach and half-year red.
Aliases: willow-leaf peach, half-year red. Family and genus: belongs to the Apocynaceae family, Nerium genus. Origin: native to Iran, now widely planted in tropical and subtropical regions; cultivated in all provinces and regions of our country. Morphological characteristics: evergreen large shrub, up to 5 m tall, containing sap, hairless. Leaves in whorls of 3-4, opposite on the lower part of the branches, narrowly lanceolate, 11-15 cm long, 2-2.5 cm wide, light green beneath; lateral veins flat, densely arranged and parallel. Cymes terminal; calyx upright; corolla dark red, fragrant, double-petaled.
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