This is a kind of physiological disease, also called tendon rot or strip rot or rot, which mainly damages the fruits. Here we will introduce it to you. There are two common types. The first is browning. The young fruit period began to occur, mainly affecting 1 to 2 ear fruit, local browning occurred on the fruit surface during fruit enlargement, the fruit surface was uneven, individual fruits were brownish brown or appeared necrotic spots, and the open fruit was cut and found in the peel. The vascular bundles were dark brown in strips, hardened or hardened, and lost their commercial value. The second is the white variant. Mainly occurs in the period of ripe fruit turning red, the disease is the uneven coloration of the fruit, light fruit shape change is not, heavy parts close to the pedicel appear green protruding shape, reddening part is slightly sunken, the disease part has wax Glossy, cut open fruit can be found in the fruit was "squeaky" shape, dark brown vascular tissue of the pulp, the light part of the brown and necrotic vascular bundles, and browning site did not change, hard meat, poor quality, food Light and tasteless. Onset of heavy fruit, the vascular bundles of the fruit were all dark brown, some of the fruits formed voids, and the bright red and green surfaces were uneven. The vegetable farmer speaks of white variations. Tooth rot in tomatoes is generally not seen on stems and leaves. However, cutting off the stem at a distance of 70 cm from the root shows that the stem's conducting tissue is brown and has been damaged, causing the above symptoms to appear in the fruit. This is related to viral diseases. different places. Cause: As it is a physiological disease, the degree of damage depends on the species, the number of hours of sunshine, the intensity of light, and the ratio of nitrogen, phosphorus, and potassium in the soil. Prevention methods: mainly work on management, increase light scientifically to determine the sowing, planting period, using formula fertilization. The above-mentioned conditions can be sprayed with multiple element fertilizers. Cucumber Diseases and Pest Control Techniques in Protected Areas 1. Physical Control (1) High Temperature Disinfection Soil: The use of high temperature during the three summers. After the spring protection site has been pulled, clean the garden first, remove the sick, diseased leaves, and diseased roots from the fields and bury them deep or burn them out; apply 50-100 kg of lime per acre and 1000 kg of straw (or wheat straw) evenly. On the surface; deep plowed earthworm 66 centimeters, super high ridge 33 centimeters, irrigation, so that when the ditch is always full of water; covered plastic film and enclosed greenhouses 7-10 days, can prevent cucumber blight, disease, root knot nematodes and so on. (2) baking soda or high-fat membrane control of powdery mildew: just before the occurrence of powdery mildew, spray baking soda 500 times, every 3 days, even spray 5-6 times, both against powdery mildew, but also decomposition of carbon dioxide, Improve cucumber production. Or use 27% high-fat emulsion 80-100 times, spray 6 days, spray 4 times. (3) The yellow plate induces limulus or silver gray film to hide. 2. Biological control (1) Disease prevention: For powdery mildew, anthrax, and black spot, when initial disease occurs, spray 2% agricultural anti-120 or agricultural anti-B0-10 water 200 times, separated by 6- 7 days spray 1, even spray 3-4 times, can also cure gray mold, downy mildew. Bacterial diseases, such as the initial stage of angular spot disease, can be sprayed with 100 times liquid of agricultural anti-751 fluid, sprayed every 5-6 days, and sprayed 2-3 times. (2) Insect protection: When cucumber aphids occur, they can be sprayed with 200 mg of Guansumycin, plus 0.01 neutral detergent, or 200 ml of 0.65% artemisinin, plus 60-80 kg of water. Astragalus membranaceus can be sprayed with 20% compound Liuyangmycin 800-1000 times liquid, sprayed every 6-7 days, and sprayed 2-3 times. 3. Chemical control For the cucumbers that have already been protected, the pesticides with high-efficiency and low-residue residues can be used for proper prevention and control. Downy mildew can be obtained with 7% anti-mildew spirit dust or 80% of Dasung M-45 WP or 72% of dew wettable powder; gray mold with 5% of Mildew spirit dust or 50% of Mildewweed or wet powder or 50% Wan Zhi Ling 2 1000 times liquid; keratoses with 5% antibacterial dust or bacteria spirit; Scab can be used against black mold dust or 40% Fuxing emulsion; anthrax with 8% carbon charcoal dust or 80% anthraquinone Wettable powders; Aphid, whitefly can be used to control flood control dust or 10% imidacloprid wettable powder.
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