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What types of pests and diseases occur at the wheat seedling stage
What pests and diseases occur at the wheat seedling stage? Please introduce wheat rust. 15~20 days after wheat emergence, select wheat fields with conditions favorable for disease development for investigation. When the diseased leaf rate reaches 10%, and the autumn temperature is relatively high with more rainfall, immediately spray Heguoli or triadimefon for control, that is, use 12.5% Heguoli wettable powder 1... per mu
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Common pests and diseases during the wheat grain-filling stage and their control methods
What pests and diseases should be watched for during the wheat grain-filling stage? Please explain. During the Start of Summer period, winter wheat in the north generally enters the flowering and grain-filling stages and has a relatively high demand for water. Because field humidity is high, pests and diseases such as wheat aphids and stripe rust have further developed and spread, so recently winter wheat areas in the north still need to...
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When is the best time to control wheat pests and diseases?
When is the best time to control wheat pests and diseases? Please advise. The timing of wheat pest and disease control is most critical. If you want to control pests and diseases more effectively, you can refer to the following methods: the best control period for rosette dwarf virus disease is mid-March, using a 1000-fold dilution of 50% methamidophos or a 1500-fold dilution of 40% omethoate to spray the edge rows of wheat fields adjacent to insect sources...
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What are the main diseases of navel oranges? A detailed explanation
What are the main diseases of navel oranges? How should these diseases be prevented and controlled? Please introduce them. Fruit cracking, sunburn and navel yellow are the three major physiological diseases of navel oranges, and many first-time growers lack experience in preventing and controlling them. After years of trials, the author has accumulated rich experience in preventing and controlling navel orange fruit cracking, sunburn and navel yellow, and has effectively controlled...
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A Detailed Guide to Common Pests and Diseases of Rose and Their Control Methods
The rose has a beautiful appearance, comes in a thousand forms, is richly fragrant, and blooms in all four seasons. In particular, it has a great many varieties and is easy to propagate and cultivate. It is praised by people as the "Queen of Flowers" and is one of the ten most famous flowers of our country. However, rose pests and diseases often cause poor growth and even death, seriously affecting its ornamental value.
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What are the main pests and diseases of sweet corn? Learn it all in one article
What are the main pests and diseases of sweet corn? How to control them The main pests and diseases occurring in sweet corn are: corn borer, northern leaf blight and southern leaf blight, and sheath blight. I. Occurrence of pests and diseases Corn borer: moderate occurrence, locally on the heavy side. According to surveys, at maturity the average damage rate of corn plants was 10.06%, and in severely affected fields the average plant damage rate was 31.43%. At present, the larval stage in the field is mainly late-instar larvae, with an average of 1971 larvae per mu, reaching as high as 2500.
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Control and Prevention Methods for Common Potato Diseases
How to control and prevent common potato diseases? Please give guidance. Common potato diseases include the following: A. Potato late blight. 1. Prevention: choose protective fungicides, such as Dashengfu (mancozeb suspension concentrate produced by Dow AgroSciences), Bibei (Bordeaux mixture). The key techniques for preventive fungicides...
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What are the methods for preventing and treating rose diseases
1. Symptoms. Black spot is most prevalent in the Beijing area during summer and autumn. Infected rose leaves develop dark brown spots 3-4 mm in diameter with a yellow halo around them, and the leaves drop off; when the disease is severe, only the stems and infected young shoots remain on the rose plant. 2. Early prevention (1) During the rose seedling stage, prevent the leaves from...
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What are the common diseases of roses? A detailed guide to prevention and control methods
Symptoms: In the early stage of the disease, small purple-brown spots appear on the leaves, which later expand into nearly circular dark brown spots, often with a radial yellow halo at the edges. In severe cases, the spots merge, and the leaves wither and drop, especially in summer and autumn, causing massive leaf loss, leaving the lower part of the plant as bare stems. After young shoots are infected, dark brown streaks appear, slightly sunken, causing the young...
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What are the control methods for the main pests and diseases of wampee?
How do you control the main pests and diseases of wampee? Please introduce the main pests and diseases of wampee, which can be controlled by referring to the following methods: 1. Anthracnose. Wampee anthracnose is a common disease in production, and it can be infected at all growth stages. In recent years, it has occurred more severely from June to October. Control methods: use fertilizer and water scientifically to strengthen the tree vigor,...
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