Do not forget to spray before grape bagging
First, the sparse fruit before the grape blossom, should be based on the number and quality of flower spikes, sparsely remove some flower spikes, so that the nutrient concentrate supply the remaining high-quality flower spikes, in order to improve the fruit quality and fruit setting rate. When sparse spikes, poor flower buds with poor flower development, small panicles, and fine stems are often removed, leaving flower spikes with large panicles and well-developed panicles. In order to make the appearance of flower spikes consistent, the sparse heads should be pruned. Divide the panicle first, and then remove the 2-3 spikelets from the upper part of the panicle. The tip of the panicle should be cut off 1-2 cm, leaving the entire panicle 14 - 15 spikelets, so that the ears are neat and beautiful. Sparse fruit grains are generally carried out 15-20 days after flowering and when the fruit is about the size of soybeans. Due to the difference in the weight of the ear and the size of the fruit between different varieties, the number of remaining grains is also different. "Kyoho" grapes generally leave 35-40 grains per panicle, "vines" grape generally leave 30-35 grains per panicle. When sparse grains, the disease, fruit, fruit, fruit and malformed fruit should be firstly dispelled, then the large fruit and small fruit without seeds should be neglected. Select the same size and orderly outwardly arranged fruit. Second, ear bagging paper bags can be used for domestic special paper bags, but also based on the size of the ear, with kraft paper or newspapers made of 26 cm long, 20 cm wide fruit bag. The bagging time varies according to the flowering period of the variety. Usually, it takes half a month after the flower is cut and the young fruit resembles the size of the soybean. High efficiency, low toxicity fungicides and insecticides must be sprayed on the ears before bagging. The agent can be used as 40% asparagus blue powder 500 times, 70% thiophanate-methyl 800 times. Immediately after the liquid was dried, the fruit was bagged and the mouth of the bag was tightly tied to the new shoot with a thin wire or paper clip. According to the variety, remove the bag 8-15 days before harvest to improve the light conditions to facilitate fruit coloring and maturation.