-
Key Technical Points for Cultivating Chinese Toon in a Solar Greenhouse
Chinese toon, also known as chun ya (toon sprouts), is rich in nutrients. Every kilogram of tender stems, leaves and sprouts contains 840 g of water and 98 g of protein, and also contains vitamin C, A and B as well as calcium, phosphorus and other substances. Chinese toon can be stir-fried, served cold with dressing, deep-fried, eaten fresh, eaten dried or pickled. Greenhouse cultivation of Chinese toon mainly
-
How to control lychee erinose mite? A must-read for growers
The lychee erinose mite, also known as the lychee gall mite or lychee hair spider, causes the affected leaves to develop what is called felt disease. It damages lychee and longan. Both adult mites and nymphs attack tender shoots, leaves, flower clusters and young fruit, sucking sap. On affected leaves, yellow-green patches first appear on the underside; the damaged patches are sunken
-
Control Methods for Stem Rot in Sweet Potato Cultivation
Sweet potato stem rot, also known as sweet potato wilt, fusarium wilt, stem blight, etc. [Pathogen scientific name] Fusarium bulbigenum Cke. et Mass. Var. botatas Wollenw. [Host crops] Sweet potato and other Convolvulaceae plants. [Disease diagnosis] Diseased seedlings show swollen, bluish roots, with the vascular bundles turning brown and the upper parts turning yellow and thin. When mature plants are affected, the diseased plants are stunted, with swelling at the stem base and a bluish halo on the surface. When the diseased part is cut open, the vascular bundles can be seen to have turned brown after infection, extending upward from the stem base for 20 to 30 cm. Apart from a few green leaves at the top, all other leaves of the diseased plant turn yellow, and the lower old leaves successively wither and drop off. In the later stage, the cortex of the diseased part cracks, appearing fibrous, and pink mold-like growth appears on the surface. When storage roots are affected, the root end becomes rotten, and a cross-section of the discolored vascular bundle area in the upper part of the diseased root shows dark brown ring-shaped spots. The pathogenic fungus is Fusarium oxysporum f. sp. batatas. Macroconidia are sickle-shaped, with slightly pointed apical cells and slightly curved tips on the end cells, having 3 to 5 septa. Microconidia are single-celled, oval to elliptical. Chlamydospores are brown and spherical.</p><p>[Disease occurrence pattern] The pathogen overwinters as mycelium and chlamydospores in diseased storage roots or attached to diseased residues in the soil. The pathogen can also survive in the soil in a saprophytic state. The pathogen mostly invades through wounds and spreads along the vascular bundles. The cut end of transplanted seedlings is the most important invasion site, and wounds on roots and leaf scars can also allow invasion. The pathogen can also invade poorly growing seedlings. The disease can spread over long distances through diseased storage roots and diseased seedlings, and over short distances mainly through soil, flowing water, and farm tools. A soil temperature of 27 to 30°C and high soil moisture favor disease development. Frequent rainfall and large amounts of rain often cause severe outbreaks of the disease.</p><p>[Control measures] (1) Select disease-resistant varieties, such as Chaoshanbai, Nanjing 92, Jinshan 247, Taichengshu, Nanruishao, Jinqing No. 9, Xuzhou 18, etc. (2) Select disease-free seed storage roots and raise seedlings in disease-free soil. (3) Before planting, soak the sweet potato seedlings in 0.2% "401" antimicrobial agent for 10 minutes for disinfection. (4) Apply fully decomposed manure. Irrigate appropriately and drain field water promptly after rain. (5) In heavily infested plots, carry out crop rotation with grain crops for more than 3 years; rotation with rice for 1 year can already be effective. (6) Remove diseased plants promptly when found and burn them in a centralized manner or bury them deeply. (7) In the early stage of disease, spray promptly with 30% Luyedan wettable powder at 800 times dilution, or 50% benomyl wettable powder at 1500 times dilution, or 40% Shuangxiaoling aqueous solution at 800 times dilution, or 50% thiophanate-methyl wettable powder at 500 times dilution. </p>
-
Control Methods for Sweet Potato Scab, a Must-Read for Growers
Sweet potato scab, also known as sweet potato bud-shrinking disease, is commonly called leprosy disease, hard stem disease, etc. [Pathogen scientific name] Sphaceloma batatas Sawada. [Host crop] Sweet potato. [Disease diagnosis] It mainly damages young shoots, leaves and stems, and can also damage tubers. Leaves are mostly tender
-
What are the control methods for sweet potato black star disease?
Sweet potato black star disease, also known as black spot disease. [Pathogen scientific name] Alternaria bataticola Ikata. [Host crop] Sweet potato. [Disease diagnosis] It damages leaves, petioles and stems. When leaves are affected, water-soaked brown spots first appear, and after expansion the lesions become round, ell
-
Control Methods and Technical Key Points for Sweet Potato Brown Spot Disease
Sweet potato brown spot disease, also known as angular leaf spot. [Pathogen scientific name] Cercospora batatac Zimm [Host crops] Sweet potato, water spinach, morning glory, etc. [Disease diagnosis] It mainly damages leaves. When leaves are affected, water-soaked small spots first appear, then the lesions gradually expand
-
How to treat peanut seeds before spring sowing? These points you need to know
The farming proverb says that around Grain Rain, you plant melons and sow beans, and the busy spring plowing work is about to begin. Today let's discuss with fellow farmers the methods for treating peanut seeds before sowing, to lay the foundation for uniform emergence, full stands, and strong seedlings. First, select good seeds and superior seeds, and classify the seeds.
-
How to prevent and treat downy mildew in zinnias? A detailed guide to practical methods
Zinnia is also known as zinnia and step-up-high, among other names, and is an annual herbaceous flower of the genus Zinnia in the Asteraceae family. It originated in Mexico. The flowers are relatively large, richly colored, distinctive in shape, and have a long flowering period, and it is now cultivated in various places. In zinnia breeding research and cultivation production practice, new
-
How to grow hydrangea? Master these tips to grow it easily
Hydrangea, also known as grass hydrangea and shade hydrangea. It is best to repot once every year in early spring, replacing with fresh potting soil (half leaf mold and half garden soil mixed with a small amount of sandy soil). When repotting, remove part of the old soil and rotten roots, and prune appropriately. Hydrangea likes fertilizer; during the growth and development period,
-
A Detailed Guide to the Four-Season Care of Hydrangea
Hydrangea, also known as herb hydrangea, blooms from June to July. The flowers open white and gradually turn pink or blue, forming large spheres composed of sterile flowers. When the flowers bloom in profusion, they look like snow pressing down on the tree, charming and moving. Its branches and leaves spread densely, and its roots are fleshy. It has strong adaptability and can be planted in the ground in home
条件筛选