Crackling, unceasing rain, indicating the "rainy season" - the arrival of the rainy season...
During the rainy season, there are also torrential rains from time to time. After the rainstorm, the high temperature and high humidity weather will trigger the occurrence of various diseases and insect pests, which is easy to have a greater impact on the grapes that are about to ripen. Therefore, fruit growers should do a good job in the prevention and control of grape diseases and insect pests in a timely manner
How to prevent it? Experts have advice
Repair the operating road on the furrow surface to protect the tillage layer;
Increase the application of organic fertilizer and strictly control nitrogen fertilizer;
Before and after bagging, to maintain an adequate supply of moisture;
It is necessary to cut off the excess side shoots to ensure the coordination of the growth of the aboveground part of the branches and leaves and the underground root system;
Calcium supplementation in the first and middle stages of the hardcore phase, with the administration of 0.4-0.5% calcium nitrate or calcium amino acid calcium or other calcium fertilizers.
Split fruit
Pay attention to calcium supplementation;
Stable drainage ditch water is located 40 cm below the furrow surface;
15-30 days before harvesting, the old membrane is laid in the drainage ditch and drained outside the furrow.
Spray the diseased fruit spike with 10% high-efficiency cypermethrin 2000 times + 80% hydrochole alum 600 times or wowoline copper 1500 times;
Remove the diseased tissue and cut the diseased grapes out of the field;
Auxiliary measures: Sweet and sour solution + dimethod or other insecticides are combined into bait to trap the adult vinegar fly.
It can be sprayed with 1% Wuyimycin 100 times liquid, once every 10-15 days; in addition, it can also be sprayed with 40% fluosilazole * emulsion 8000 ~ 10000 times liquid (limited to 3 times per year), or 50% amethoxystil * water dispersible granules 2000-4000 times liquid.
Timely remove diseased branches and fruit spikes in the field, and take them out of the garden for centralized destruction;
Strengthen cultivation management, strictly control yield, reasonable fertilizer, improve tree potential, enhance plant disease resistance; shed cultivation should be covered with film in time to avoid rain on grape plants;
Uproot dead trees and disinfect the soil around the trees;
Fungicides such as methylthiophilia and carbendazim are added to the adhesive and applied to the ice branch treatment shear or disease site to prevent and control the invasion of pathogens.
Can be booby-trapped with sweet and sour liquid: (1 pot per acre until the grapes are sold out);
Recipe: Sucrose: Vinegar: White Wine: Water = 6:3:1:10, add a small amount of dimethopods. Open at night, the night moth eats and poisons the pot and around, and the night moth and other insects are fished out and covered in the early morning.
Agricultural control: strengthen field management and improve ventilation and light transmission conditions. Thoroughly clean the leaves and weeds in the garden after autumn and early spring to reduce the source of overwintering insects;
Physical control: use yellow plate booby traps, hang 20-30 jiaduo yellow plates per acre on the grape rack, and apply sticky shellac every 10-30 days;
Chemical control: spray 2.5% high-efficiency cypermethrin emulsion 1000 to 4000 times liquid, or 0.3% matrine emulsion 400-800 times liquid, in addition, you can also use pyridoxine, phenoxyvir and other agents. Pay attention to the spray evenly, thoughtfully and comprehensively.
From June to August, the insect population density is large, and it is necessary to spray 15% pyridoxin emulsion 1500 times liquid to eliminate eggs and insects.