No pesticides are used after grape harvest After the wrong point is harvested, the prevention and control of pests and diseases is neglected or deemed unnecessary. Reasons After grapes are harvested, it is necessary to ensure that most of the leaves of the grapes are healthy, so as to ensure that the branches of the grapes are fully mature. At the same time, the branches and roots need to accumulate nutrients. These need to have enough healthy leaves; the prevention and control of pests after grapes are Reducing the overwintering base of pests and diseases is an important control period to lay the foundation for pest control in the second year. If the disease spreads after grape harvest and causes early leaf defoliation, it will not only affect the grape production (yield and quality) in the second year, but may require several years of recovery in serious cases. Correct approach Generally, vineyards must use pesticides and adjust measures according to specific conditions. The long-growth varieties (late-maturing varieties) fell leaves immediately after harvest, and no measures were taken. There is no time to take measures after the late-maturing varieties are harvested. The reason is about 2 months before deciduous, which is the rapid growth period of the grape root system. The growth of the grape root system during this period is not only the basis for preventing freezing damage, but also the condition for the healthy growth of the grapes in the second year. After harvesting, it is an important period to reduce the source of overwintering bacteria and insects. Measures should be taken according to the specific conditions of the orchard. Correct method â‘ Reduce yield (reasonable load): In the late growth period of grapes, especially in the mature period, make the leaves have sufficient nutrients, not only to ensure the normal maturity of the grapes, but also sufficient nutrients for the aging of the branches, the differentiation of flower buds, and the root system Growth, accumulation of root nutrients, etc. â‘¡According to the climate and the occurrence of diseases and insect pests, take corresponding control measures when the grapes begin to mature to ensure the safety of the leaves in the later stage. â‘¢After the grapes are harvested, immediately use a copper preparation (such as 1:0.7:100 times Bordeaux mixture) to preserve the leaves, and as a measure to reduce the number of overwintering pathogens. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Dried chilli slices Sichuan Liuhang Agriculture Co.Ltd , https://www.lhagriculture.com