Grape coloring during the ethylene glycol hormone dosage is not appropriate, the phenomenon of falling grains, the leaves will appear yellow. Use vinyl ripening grapes should pay attention to the following aspects. Concentration should be appropriate, concentration is too low effect is not obvious, concentration is too high, easy to cause fruit drop. The best treatment time is when the fruit begins to ripen, that is, when the colored varieties begin to change color and the white varieties turn slightly yellow, the treatment effect is the best. The best ripening concentration of different varieties is different, and the best ripening concentration and ripening method should be determined through tests in production. There is basically no good remedy if the phenomenon of grape threshing occurs. If the phenomenon of grape threshing occurs, we must promptly irrigate and spray the grapes grains, and generally speaking, if the phenomenon of threshing occurs, the leaves will turn yellow. These are the phenomena of excessive use of ethylene glycol. Maybe some people use equal amount of ethylene, the reason is that the tree is weak, the tree is weak, a large amount of this problem, that is, high temperature, too high temperature using ethylene or the phenomenon of falling grains and yellow leaves. You can spray some foliar fertilizer on the leaves. It must be neutral, not acidic or it will aggravate the condition. The following is a picture of yellow leaves and falling grains of Giant Peak grapes sprayed with ethylene glycol under high temperature, taken in Chentun Town, Gaizhou City, Liaoning Province, where the temperature reaches 32 degrees.