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Rice cancer has met its nemesis: breeding of a disease-resistant new variety succeeds
Since the beginning of this century, rice stripe virus disease has continued to break out over large areas, in severe cases even causing rice farmers to lose their entire harvest. Rice stripe virus disease has been regarded as the "cancer" of rice. "Wuyujing 3", long recognized by the market as the main rice variety with the best taste and quality in Jiangsu Province and surrounding areas, has seen its planting area plummet in recent years because it is highly susceptible to rice stripe virus disease. Some stripe virus-resistant varieties either have shortcomings in yield and yield stability, or have not been fully recognized by the market for their rice quality. Rice farmers
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New Carnation Variety Yun Zhi Die: Disease-Resistant and High Quality
"Yun Zhi Die" is a new carnation variety bred by the Flower Research Institute of the Yunnan Academy of Agricultural Sciences. Trial-planted in 2005 in the main carnation-producing areas of Yunnan, it showed characteristics of wide adaptability, high yield, strong disease resistance, pure flower color, tolerance to transport, long vase life, and ease of cultivation. In 2005 it obtained plant variety registration and protection from the Ministry of Agriculture. I. Botanical characteristics. Single-flower type. The stem's cross-section is angular, without cavities. Leaves are blue-green, long sword-shaped, 15.99 cm long and 0.92 cm wide, with a rich waxy layer on the surface and no hairs on the leaf margins.
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Occurrence and Control Methods of Carnation Viral Diseases in Protected Cultivation
Symptom Identification Carnation Vein Mottle Virus Disease When carnation is infected by Carnation vein mottle virus, it infects carnation, China pink (Dianthus chinensis) and American pink (Dianthus barbatus), all producing systemic mosaic, and in winter the old leaves often show symptom masking. Discolored spots appear on the petals, and the symptoms are especially obvious on red large-flowered cultivars. Carnation Latent Virus Disease After carnation is infected by this virus, it generally shows no symptoms, or has mild mosaic symptoms. But when Carnation latent virus and Carnation vein mottle virus infect together, mosaic symptoms are produced. Carnation
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What is the fungal leaf spot disease of cut-flower carnations?
Symptoms: purple round spots 0.5-1.5 cm in diameter, surrounded by a yellow-green margin; the centers of the spots then turn brownish-gray and dry out, and finally the lesions enlarge, black spores appear, and the leaves begin to yellow and drop. Causes: watering from above the plant, poor ventilation, excessively high humidity at night, and overwatering and overfertilizing after planting are also among the causes of the disease. Control methods: keep the plants as dry as possible, preferably use drip irrigation, and maintain good ventilation. Use 1% Bordeaux mixture or 75% chlorothalonil wettable powder at 500 times dilution,
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Control Methods for the "Three Pests and One Disease" in Mushroom Cultivation
The "three pests and one disease" that harm autumn mushrooms are: mites, springtails, mushroom gnats, and harmful Mycogone perniciosa. The damage characteristics and control methods of these pests and diseases are described below. I. Mite damage symptoms: During the spawn-running process, if mycelial regression is observed, such as a decrease in fluffy mycelium and an increase in strand-like mycelium, and pinkish shiny spots are seen on the mycelial surface, then mite infestation has appeared on the mushroom bed. When 3-5 mites are present within the range visible under a magnifying glass, the control threshold has been reached. After casing soil is applied, mites will move along with the mycelium growing toward the soil surface and move with the soil surface, concentrating
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Eight Major Disease Prevention and Control Measures for the Green Development of Mushrooms
Establish the "big prevention and control" concept of integrated management. The occurrence, and even the epidemic or outbreak, of edible mushroom diseases all follows certain developmental patterns. Patterns are science, and no carelessness is tolerated. On the surface, diseases appear only at a certain production stage, but the occurrence of disease requires quite a few conditions. If any one condition cannot be met, the occurrence of disease may be reduced, lowered, or even impossible, or even if it occurs, it cannot cause harm. Therefore, one should not only prevent or treat at the stage where the disease occurs, but should start from the source
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What are the chemical control measures for mushroom pests and diseases?
1. After casing soil is applied to the mushroom bed, spraying the soil and the surrounding space with a 0.1% formaldehyde aqueous solution or carbendazim solution can effectively prevent and control the occurrence of many diseases. 2. Spray a 0.1% formaldehyde aqueous solution or carbendazim solution in the mushroom house once a month. 3. When pests and diseases are found and pesticide use is needed, choose the appropriate pesticide, dosage and timing for different pests and diseases, so as to avoid ineffective control, or phytotoxicity or mushroom contamination or human and livestock poisoning and other adverse consequences. 4. When rodent damage is found, promptly eliminate them with poison or trap them.
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Potato spindle tuber disease
[Virus English name] Potato spindle tuber viroid [Host crops] Potato, tomato, etc. [Disease diagnosis] Diseased plants have upright stems with very few branches. Leaves are held upright, and the angle between the petiole and the stem becomes smaller; leaf margins are wavy or curl upward, and leaves are stiff and brittle with a dark green color; leaves become smaller and curl into a half-closed, twisted shape. At the bud stage, plant growth is noticeably delayed, leaf color becomes lighter and sometimes yellowed, and severely diseased plants are stunted. Tubers are elongated, or one end is more pointed, forming a spindle shape, with
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Detailed Explanation of Key Technical Points for Pest and Disease Control in Pear Orchards
Currently, pear orchards are in full bloom. At the late flowering stage of pear trees, fruit growers should promptly control the following pests and diseases: Pear midge and pear psylla: according to the flowering status of pear trees, spray for control promptly when flowering is basically over. For the pesticide, 10% Shenjian 1500x solution plus 10% Shijia Bilin 2000x solution can be used. Pear rust and pear scab: at the end of pear tree flowering, apply pesticide promptly by spraying for control. For the pesticide, 15% Fenxiuning 1500x solution or 45% Dasheng 800-1000x solution can be used, plus 105 Shigao 60
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What are the control methods for physiological diseases of mushrooms?
Hard opening of the cap: When mushrooms encounter abnormal weather, the phenomenon of young fruiting bodies opening their caps prematurely is called hard opening of the cap. It generally occurs at temperatures above 18°C, with a temperature difference of about 10°C, or under sudden temperature drops. Insulation work should be done well before sudden temperature changes, and the relative air humidity in the mushroom house should be increased. Malformed mushrooms: The causes of formation are uneven thickness of the casing soil, low fruiting position, and carbon dioxide content in the mushroom house exceeding 0.3%; or they are caused by pesticide damage, diseases, and insect pests. Attention should be paid to the quality of the casing soil and ventilation, preventing harmful gases from entering the mushroom house; attention should be paid to prevention
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