Science to prevent pear black butt disease
Pear black butt disease is a new disease that gradually becomes serious with the development of bagging pears. It mainly refers to the appearance of black spots or dark spots at the pear blossoms. Once any disease occurs, no black spots can be eliminated, resulting in a large number of pears. Loss of commodity value caused serious damage to the fruit grower. In particular, Huang Guan Pear and Emerald have encountered more rainfall, more cloudy days, and lower temperatures in the late growth period. Pear black butt disease is prone to outbreaks. There are three main reasons for the incidence of pear black butt disease. The first is caused by phytotoxicity. The phytotoxicity is mainly caused by some kinds of thiamine, sulfur, organophosphorus, and mancozebs. The drugs are easy to stimulate the younger fruit surface, especially the accumulation of black liquid spots in the vicinity of the calyx. The second is caused by calcium deficiency in physiological skin. Physiological calcium deficiency makes the pericarp of the pericarp, especially near the calyx, vulnerable to parasitism by weak parasites, leading to black buttocks. The third is the damage of pears, resulting in damage to the fruit skin at the calyx, which is easily infested by weak parasites. Prevention and control methods 1 Improve the fight against drugs. Use drugs with little irritative effect on the fruit surface, use fine mist sprayer to fight drugs, spray as little as possible on the surface of the fruit, and prevent the accumulation of liquid at the phlegm. 2 Calcium should be sprayed once before bagging and one month before picking. 3 In the 2 to 4 days after the pears are fetched, spray the low-toxic, non-pollution, natural biomimetic, strong osmotic osmotic agent 25% Amisida (azoxystrobin) suspension 4000 times once, basically Control the occurrence and harm of black ass disease; spray the 25% Amisida suspension 4000 times once before pear bagging, the effect will be better. 4 Note when spraying: It must be bagged after drying the liquid; in the pear tree, Amicidar is forbidden to be mixed with other drugs. Universal A.I. Sheaths With Blue Insert Blue Insert Universal A.I. Sheaths,Universal Sheaths,Sheath Blue Insert Split-Non,Endoscope Hydrophilic Coating Dilators Jinan Mucho Commercial Inc. , https://www.muchovet.com