Pest control methods for wheat and other crops
The upper edge of the wheat seedlings has a dry edge and there are yellow spots on the leaves. What is the cause? What should I do? A: According to the pictures you provided, the wheat grows weak, the leaves are spotted, and the leaf blight is suspected. Control measures: First, watering and fertilizing, and second, spraying Noplin wheat foliar fertilizer to promote its transformation as soon as possible.
What are the main symptoms of wheat scab? How to prevent it?
A: The main manifestation of wheat scab in the panicle is dry white half-cut and red moldy spikelets. This is because a small spike in the ear or a grain of bacteria in the flowering stage is highly humid, causing damage to the vascular bundle and causing water loss in the upper part of the ear. Control: Spraying thiophanate-methyl or tebuconazole should be carried out at 70% of the whole field. Wheat is weak, yellow seedling, what kind of foliar fertilizer is sprayed? A: If it is before heading, it can apply 10-15 kg of high-nitrogen compound fertilizer per acre; if it is heading, it can spray Noplin wheat leaf surface. Fertilize 2 to 3 times to promote its transformation and enhance leaf photosynthesis. The tip of the wheat leaf is bitten by the wheat leaf bee. How to prevent it? A: The wheat leaf bee generally does not need to be controlled. If the insect population is large, it can be controlled by a pyrethroid insecticide or a phoxim spray.
There are a lot of wheat spiders in the wheat field. How to prevent it? How to prevent it next year?
A: It depends on the amount of insects. If you use A4 paper in the ridge, more than 1,500 double-row wheat spiders should be prevented in time. Generally, it is sprayed with acaricide such as avermectin or hydrazine. How to control the effect of wheat sucking insects? Answer: There are two key periods for controlling wheat larvae. One is to smear the poisonous soil in the flood season, and use 3% methyl isoflavin, phoxim or chlorpyrifos 1~1.5 kg, mix fine soil 20 ~25 kg, sprinkle into the field at the booting stage of wheat, then water it. The second is spraying in the adult stage. When the head is 70% in the field, spray with a pyrethroid pesticide plus noplin wheat foliar fertilizer, and spray again after 3 to 5 days.
What are the main symptoms of tomato leaf mold? How to control it?
A: The main symptom of leaf mold is the yellow spot on the front of the leaf, and the gray margin on the back of the leaf. Prevention and treatment methods: First, increase the amount of air release, reduce temperature and humidity; Second, use spring lycopene plus noplin tomato leaf fertilizer mixed spray, 5 to 7 days again, even spray twice.
There are many yellow-white spots on the leaves of melon, and there are also on the back. What is this disease? How to prevent it?
A: It may be bacterial leaf spot. Prevention and treatment methods: can be used for the prevention and treatment of serotonin, garnipone or flucarbazone.
Q: The watermelon seedlings are yellow and dead, but if you look at the roots, what should I do?
A: There are many reasons for this phenomenon, such as drought, excessive vents or leaf blight. Control measures: timely irrigation, while spraying pyraclostrobin plus nooline watermelon leaf fertilizer.
The cucumber is soft and rotten, with long white hair on it, and there are also stems and vines. What is this disease? How to prevent it?
A: Suspected of cucumber disease. Noplin cucumber leaf fertilizer can be used for prevention and control.
The grown cucumbers are all curved into a circle. What is the reason? What should I do?
A: First, de-fertilization, nutrition can not keep up or the scorpion is too weak (premature aging), nutrient distribution is unreasonable; second, smear, sputum medicine is too heavy; three may be caused by disease infection. In view of these situations, it is necessary to distinguish the reasons for the primary and secondary, and take different measures. It is necessary to strengthen management, scientific fertilization, and promote the transformation of scorpions into sturdy scorpions. For diseases, it is necessary to distinguish the pathogens and prevent them from being treated.
Cucumber yellow leaves, leaves shrink, what is this disease?
A: If the whole field is not a disease, it is caused by poor management. If an individual strain occurs, the root system may be damaged. Control measures: First, maintain proper temperature and humidity in the field, balance fertilization, and enhance light. The second is to spray rooting Noplin cucumber leaf fertilizer to promote transformation.
There are many irregular necrotic spots on the leaves of cucumber.
A: This is cucumber downy mildew. Control measures: First, reduce the humidity, increase the temperature, if necessary, take a high temperature shack; the second is to apply the therapeutic agent, you can mix the two kinds of enoylmorpholine, cymoxanil, metalaxyl and ethyl phosphine, 3 Spray once every 4 days, even spray twice, and add Noplin cucumber leaf fertilizer, which can be effectively controlled.
What is the cause of yellowing of eggplant seedlings?
A: It may be caused by phytotoxicity or root damage or yellow blight. Control measures: First, spraying seaweed and humic acid foliar fertilizer; second, using dysprosium plus allicin, and adding rooting noplin eggplant foliar fertilizer to root, promoting rapid rooting.
Some people say that the eggplant rotten stem is gray mold, how to control it?
A: Rotten stems may be gray mold or bacterial diseases. Prevention and treatment methods: If it is gray mold, it can be treated with pyrimethanil and iprodione. If it is a bacterial disease, it can be treated with folate.
Tomato yellow leaves, dry leaves, what is this disease?
A: It is suspected that it is caused by bacteria. Control method: It can be controlled by copper mixed with quinoline and noopine tomato foliar fertilizer.
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