Correct measures: inflorescence separation period, 2-4 days before flowering, with the "inverse life" biological fungicide prevention for the whole garden spraying, each box of "inverse life" to 30-45 kg of water. Gray mold, spindle brown blight unfortunately occurred, the immediate use of pharmaceuticals: 40% milbemycin 800 times +10% doxycycline 1200 times.
Because of the long period of low temperature and rain, to the grape production has brought extremely unfavorable impact. The main manifestation of the delayed germination, uneven, slow growth of the new growth of grapes. If the low temperature and rainy weather continues to maintain, will lead to grape plants susceptible to disease, at the same time will cause leaf yellowing, shedding, the new tops are not full, poor flower bud differentiation, pollination and fruiting rate is low and so on, which in turn seriously affects the yield of grapes. Low temperature and rainy weather conditions, the care of grapes need to pay attention to the following points.
One, insulation against freezing
One is to increase the application of organic fertilizer insulation. Pigs and cows manure, dry chicken manure and other farmyard fertilizer sprinkled on the roots of the plant, the amount applied per mu is generally about 1500 to 2000 kilograms. Second, the ground surface cover. Covered with straw, weeds, mulch and other agricultural film to keep warm, can significantly reduce the inverted spring cold on the grape seedling injury.
Two, strengthen the grape nutrition, timely spraying of chemicals to protect and improve the ability of grapes to resist the cold
Early spring to the vineyard to increase the base fertilizer, can accelerate soil maturation, and promote the growth of seedlings and root system robust. Base fertilizer to organic fertilizer and inorganic fertilizer combination, nitrogen fertilizer and phosphorus, potassium fertilizer combination, fast-acting fertilizer and late-acting fertilizer combination. At the same time, the nitrogen fertilizer in the base fertilizer should be appropriately controlled, especially the fertilizer depends on the seedling growth condition. In the grape buds and leaves, timely application of "fertilizer" bio-fertilizer to supplement the nutrition of grapes. There are two methods of application, can be two-pronged, alternating. First, each bag of "Fertilizer Potassium" to 30 kg of water, for foliar spraying; second, depending on the soil wetness, each bag of "Fertilizer Potassium" to 50-100 kg of water, the seedling root irrigation, can significantly promote the growth and development of the root system. Fertilizer replenishment. "As a high-tech bio-organic fertilizer, it can effectively control the reproduction of harmful bacteria in the soil. In vineyards with good soil strength, it is more inappropriate to apply more nitrogen fertilizer. Appropriate application of phosphorus fertilizer can promote the early and frequent development of the root system. This move can effectively promote plant growth and robustness, enhance its cold and frost resistance, and improve the grapes successfully through the low temperature and rainy season.
After the grapes sit to the fruit expansion period, the continuous need to increase the amount of application of "fertilizer potassium", the interval period of 10 days or so, spraying foliar, each bag of fertilizer potassium to 15 kg of water. After spraying can inhibit the nutrient growth of the new shoots, accelerate the maturity of the new shoots, shorten the internode, so that the grape leaves are thick and bright, organic nutrient accumulation is sufficient to lay a nutritional foundation for fruit growth.
Three, strengthen the pest control
(a) pre-flowering control of pests and diseases, to ensure the safety of the flowering period. If the pre-flowering control measures are good, there will be no diseases during the flowering period. Because spraying water and rain during flowering will affect pollination, and spraying pesticides will affect pollination even more.
(ii) Ineffective pre-flowering measures to prevent and control diseases, or no measures taken before flowering, resulting in serious disease; sudden pests occur, such as the Golden Turtle. When the occurrence of these pests and diseases poses a threat to the quality and smooth production of grapes, remedial measures can be taken by spraying pesticides. Agents that are safe for grapes, such as Inverse, Spectra, Metribuzin, Annihilate, Koch, Meconium, etc., which are very safe for flowers, small young fruits, shoots, and young leaves of grapes, can be used as remedial agents in the event of a disease or insect infestation.
A common problem during flowering is rotten inflorescences and stalks. Causes: Gray mold and spindle brown blight occur and cause damage. Inflorescence separation period, before flowering, is the key period of gray mold and spindle brown blight control. In these two periods did not take measures, or take measures ineffective, (coupled with the flowering period encountered more rain), is the gray mold and spindle brown blight occurrence, damage to the most important reasons.
Correct measures: inflorescence separation period, 2-4 days before flowering, with the "inverse life" biological fungicide prevention for the whole garden spraying, each box of "inverse life" to 30-45 kg of water. Gray mold, spindle brown blight unfortunately occurred, the immediate use of pharmaceuticals: 40% milbemycin 800 times +10% doxycycline 1200 times.
Four, good field drainage
Low-temperature rainy period should pay special attention to improve the inter-root soil fertilizer, water, air, temperature conditions, enhance the activities of soil microorganisms, promote root fertility, increase the root system to absorb water and fertilizer absorption capacity, is to improve the basis of the grape seedling resistance to low-temperature rain. Pay attention to digging a good drainage ditch, keep the field drainage smooth, reduce the ground conduction, and at the same time do a good job of clearing the ditch cultivation work.
Fifth, keep the orchard ventilation and light
Appropriate adjustment of plants, remove the plant's old diseased leaves, clean up the victimized stems and leaves, strengthen ventilation, increase light, and control the humidity of the planting environment.