It is precisely such a "mature" old drug that there is a problem that cannot be ignored, that is, phytotoxicity. Light causes leaf damage, weakens photosynthesis, and affects crop growth. In severe cases, drug spots (brown spots, yellow spots, net spots, etc.) are formed on the fruit surface and foliage, and even fruit spots are too large and fruit surfaces are rough, resulting in fruit rust. Seriously affect the commercial value of fruit. The main causes of drug injury are the following: 1. Blind blending affects the safety of mancozeb. It is common that mancozeb is used in combination with alkaline pesticides and copper-containing heavy metal compounds, resulting in a decrease in the efficacy of mancozeb; the mancozeb mixed with phosphate products, floccular precipitation, accompanied by hydrogen sulfide gas shed. 2. Spray time is not suitable, increase the concentration at will to increase the risk of injury. Farmers mix and synthesize a variety of pharmaceuticals and only notice the difference in their trade names, and they ignore the active ingredients and their contents. This results in an increase in the dosage of the same active ingredient and a disproportionate increase in drug concentration, resulting in injury. In addition, when the drug is administered under high temperature conditions, the activity of the drug is increased. If spraying at a high concentration, the risk of drug injury is bound to increase. 3. Product quality and spray technology affect the safety of mancozeb. Some companies are affected by the production process, and there are deficiencies in the mango Mn zinc fineness, suspension rate, wettability and other technical indicators, resulting in layering of the drug during drug application, precipitation of the drug solution, lack of efficacy in reducing the concentration, the concentration is too high Produce phytotoxicity. In addition, the poor adhesion of pharmaceuticals, coupled with the large amount of spray water, the drug can not spread well on the foliage, resulting in the accumulation of liquid medicine at the tip and fruit surface, resulting in local concentrations are too high, resulting in pesticide damage spots. To prevent phytotoxicity during mancozeb administration, it is recommended that: 1. Scientifically apply drugs during the sensitive period of crops. In actual production, the application of mancozeb in the sensitive leaves of young crops, flowering stages, young fruit, etc. is very safe. The product is preferred to foreign excellent full-compound agents, such as Penco (80% Mancozeb WP), produced by thermal complexation process, high degree of complexation, using four-level ultrafine particle grinding technology, particle production Fine, high suspension rate, high pharmaceutical safety, has been promoted in the country for more than 16 years. 2. Strictly control the application concentration. Do not arbitrarily adjust the concentration of the drug, you need to refer to the instructions and product label instructions, use within a safe and efficient concentration range. During the compounding process, care should be taken not to mix various agents containing mancozeb active ingredients. 3. In the hot season, avoid high temperature medication at midday, or adjust the dilution of the drug and use a lower concentration. 4. Reasonable mix. When multiple pesticides are mixed and applied, pesticides need to be selected in a targeted manner to avoid repeated compounding of multiple types of agents and the same active ingredients. At the same time, a mixed-mixing test must be performed first. When the compounding is confirmed, no precipitation, stratification, or discoloration occurs. It can be used only when the oil is precipitated. Erythritol For Yogurts,Etherol Sugar Substitute,Polyol Erythritol,Erythritol Vegan Ningxia Eppen Biotec CO.,LTD , https://www.nxeppen.com
Mancozeb is also a "mature" old drug but it also has no phytotoxicity
Mancozeb is a broad-spectrum, low-toxicity, low-residue, high-efficiency, multi-site and non-resistant resistant fungicides. At the same time, mancozeb also has excellent compounding properties and can be used in combination with a number of systemic fungicides to increase efficacy and delay the development of systemic resistance. So far, the global use of mancozeb has been more than 50 years old, and it has been used in China for nearly 30 years. It has become one of the major protective fungicides for fruit trees and vegetable production areas in China.