Main contents and dosage forms: 80%, 70%, 50% WP, 75% WDGs, 48%, 30%, 430 g/L SC.
Features
Mancozeb is a thiocarbamate broad-spectrum protective low-toxic bactericide that mainly sterilizes through metal ions. Its bactericidal mechanism is to inhibit the oxidation of pyruvate during the metabolic process of the bacteria, leading to the death of the bacteria. This inhibition process has six action sites, so it is extremely difficult for the bacteria to develop drug resistance.
Mancozeb products currently on the market are divided into two categories, one with a fully complexed structure and the other with a non-fully complexed structure (also known as "ordinary mancozeb"). Fully complexed products are mainly 80% wettable powder and 75% water-dispersible granules. These products are safe to use, have stable disease prevention effects, and can promote fruit surface brightening and improve fruit quality. Products with a non-fully complexed structure have unstable disease prevention effects and are unsafe to use. Improper use often causes varying degrees of phytotoxicity and seriously affects the quality of fruit.
Mancozeb is often mixed with chlorothalonil, sulfur, carbendazim, thiophanate methyl, thiram, aluminum triethylphosphonate, metalaxyl, metalaxyl metalaxyl, cymoxanil, oxalaxyl, dimethomorph, flumorpholine, oxaconazole, myclobutanil, fenconazole, triadimefon, difenoconazole, iprodione, tebuconazole, di cyanoanthraquinone, polymycin, polymycin, bordeaux mixture and other bactericidal ingredients to produce compound bactericides.
When mixed with systemic bactericidal ingredients, it can significantly delay the development of bacterial resistance to systemic ingredients. Applicable fruit trees and prevention and control objects: Mancozeb is applicable to a wide range of fruit tree types and prevention and control diseases. It has a good preventive effect on many types of fungal diseases, and also has a certain preventive and control effect on rust mites.
Technology used
Mancozeb is a protective fungicide and has no therapeutic effect on diseases. It must be sprayed before the bacteria invade the host plant to achieve ideal prevention and control effects. Mancozeb can be used multiple times in a row, making it extremely difficult for bacteria to develop resistance. When spraying on fruit trees, 80% WP and 75% WDG of fully complexed products are generally sprayed with 600 to 800 times the liquid. In order to avoid phytotoxicity, ordinary mancozeb is generally sprayed with 80% WP 1200~1500 times liquid, or 70% WP 1000~1200 times liquid, or 50% WP 800~1000 times liquid. When using suspending agent, 48% SC and 430 g/L SC are generally sprayed with 400 to 500 times of liquid, and 30% SC is generally sprayed with 300 to 400 times of liquid.
(1) Apple disease
Spray once during the red bud stage and once after the flowers fall to prevent and control rust and flower rot. Spray 80% wettable powder or 75% water-dispersible granules 600-800 times once at the end of full bloom to prevent and control mold heart disease. Start spraying 7 to 10 days after the apples fall, once every 10 days, and spray 3 times in a row (then bagging). To prevent and control ring rot, anthracnose, leaf spot disease, scab, bagged fruit spot disease, etc., as well as brown spot disease, the third treatment of bagged apples is particularly important. After bagging, spray 3 to 5 times continuously to prevent and control brown spot, spotted leaf disease, and scab. Apples without bagging can also prevent ring rot, anthracnose, brown rot, blight rot and other diseases. Spraying should be increased about two times to improve the prevention and control effect of fruit diseases. It is better to use fully complexed mancozeb within 1.5 months after flowers fall to avoid phytotoxicity to young fruits and the formation of fruit rust in the later stage.
(2) Pear tree diseases
Start spraying about 10 days after the flowers fall, once every 10 to 15 days, and spray continuously until the fruits are harvested. The specific spraying interval and frequency of spraying are determined by rainfall conditions. Spray more when it rains more and spray less when it rains less. It is better to use fully complexed mancozeb within 1.5 months after flowers fall to avoid phytotoxicity and fruit rust on young fruits.
(3) Grape diseases
Spray once before and once after flowering to prevent and control black pox and cob brown blight, as well as downy mildew. Then continue spraying from about 10 days after the flowers fall, once every 10 days, and spray continuously until the fruit is harvested or the end of the rainy season. The specific spraying time and frequency depend on rainfall conditions. Spray more when it rains more and spray less when it rains less. In rainy and humid years, the fruit needs to be sprayed 1 to 2 times after harvest to prevent further downy mildew damage.
(4) Peach, apricot and plum diseases
When preventing and controlling scab, spraying begins about 20 days after flowers fall, once every 10 to 15 days, and ends one month before fruit harvest. It also prevents anthracnose and fungal perforation diseases. When preventing and controlling brown rot, start spraying 1.5 months before harvest, once every 10 to 15 days, until one week before fruit harvest, and also prevent anthracnose and fungal perforation.
(5) Cherry diseases
Spraying begins from the early stage of disease occurrence, once every 10 to 15 days, and sprays 2 to 3 times continuously, which can effectively prevent and control leaf spot, hole disease, early defoliation and other diseases.
(6) Jujube tree disease
Spray once before and once after flowering to prevent and control brown spot disease and fruit spot disease. Then, spray continuously starting from about half a month after the flowers fall (the first flower), once every 10 to 15 days, and spray 4 to 7 times in a row to prevent and control rust and various fruit diseases.
(7) Persimmon tree diseases
Start spraying about 15 days after the flowers fall, once every 15 days, and spray 2 to 3 times in a row, which can effectively prevent and control the occurrence of round spot, angular spot and anthracnose in general persimmon orchards. Varieties or orchards with serious anthracnose outbreaks should be sprayed 4 to 6 times continuously.
(8) Chestnut diseases
Start spraying from the early stage of the disease, once every 10 to 15 days, and spray about two times in a row, which can effectively prevent and control the occurrence and damage of anthracnose and leaf spot.
(9) Walnut diseases
Start spraying about one month after the flowers fall, once every 10 to 15 days, and spray 2 to 3 times in a row. This can effectively prevent and control the occurrence of anthracnose, and can also prevent leaf spot.
(10) Pomegranate diseases
Spray once before flowering to prevent and control brown spot and anthracnose. After most flowers set fruit, spraying begins continuously, once every 10 to 15 days, and spraying 2 to 4 times in a row to effectively prevent and control various diseases such as anthracnose, dry rot, brown spot, and leprosy.
(11) Strawberry diseases
Spraying begins from the early stage of disease occurrence, once every 10 days, and sprays 2 to 3 times continuously, which can effectively prevent and control Pythium fruit rot, leaf spot and other diseases.
(12) Citrus diseases
Spraying once at citrus buds of 2~3 mm, with 2/3 flowers gone, and once at the young fruit stage can effectively prevent and control scab, anthracnose, and sand bark, as well as prevent stem rot, scab, yellow spot, etc. In rainy years and seriously diseased orchards, spraying should be appropriately increased 1 to 2 times to ensure the prevention and control effect.
(13) Banana diseases
Spraying begins from the early stage of disease occurrence, once every 10 days, and sprays 3 to 4 times continuously, which can effectively prevent and control the occurrence and damage of leaf spot, scab and anthracnose.
(14) Mango anthracnose
Start spraying after the flowers fall, once every 7 to 10 days, and spray 2 times in a row; then continue spraying from 1.5 months before harvest, once every 10 days, and spray 2 to 4 times in a row.
(15) Frost Phytophthora in litchi and longan
Start spraying from the early stage of the disease, once every 7 days, and spray 2 to 3 times in a row. Generally use 80% wettable powder or 75% water dispersible granules and spray evenly with 600~800 times of liquid.
Precautions
Ordinary mancozeb should be used with caution in the young leaf and fruit stages to avoid phytotoxicity. Special attention should be paid to the production of high-quality and high-end fruits. Do not mix it with copper preparations and alkaline agents. Spraying must be even and thoughtful. When spraying continuously, it is best to use it alternately or mixed with corresponding therapeutic agents to improve the prevention and control effect. The safe harvest interval for apples, pears, grapes and lychees is 15 days. Pay attention to personal protection when applying the medicine and avoid splashing the medicine into your eyes and skin. If swallowed by mistake, please induce vomiting, gastric lavage and catharsis immediately, and send to hospital for symptomatic diagnosis and treatment.
