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What is the best pesticide for controlling leaf blight in plants?
Leaf blight is a disease that mainly harms the leaves of plants. If it is not controlled, the disease will spread from one leaf to the leaves of the entire plant, causing all the leaves of the plant to dry up and fall off. So, what is the best pesticide to use when leaf blight occurs in plants? 1.
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Causes of Large and Small Berries in Grapes Affecting Yield and Control Measures
Every year in August and September is when grapes hit the market, and it is also the happiest time for fruit growers, but during the planting process some problems are bound to arise, among which large and small berries severely affect yield. To solve this, you need to understand the causes of large and small berries in grapes and the control measures.
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What fungicide works well to control early blight in tomatoes?
Early blight in tomatoes is a constant worry for growers. So if a tomato plant gets early blight, what fungicide should be sprayed and how should it be controlled? Early blight in tomatoes occurs in northeast China, north China, east China, southwest China and other regions; the most important feature is that whether the disease spots appear on fruit, leaves or the main stem, they all have obvious concentric rings, so it is also called ring spot disease. Fruit spots are mainly near the fruit stalk, stem spots are often at the branching points, and leaf spots occur on the leaf mesophyll. A few key points are summarized below, let's take a look. <p style="text-align: center;"></p> <p style="text-indent:2em;"><span style="color:#FF8C00">1. Symptoms of early blight</span></p> <p style="text-indent:2em;">Tomato early blight mainly harms leaves, but can also harm seedlings, stems and fruit. When seedlings are infected, dark brown spots appear at the base of the stem, slightly sunken with concentric rings. When leaves of mature plants are damaged, it mostly develops from the lower leaves upward. It first appears as water-soaked dark green spots, which after expanding become round or irregular ring-patterned spots. The edges often have a light green or yellow halo, and the center shows concentric rings. When humid, black mold grows on the spots, and in severe cases the leaves fall off.</p> <p style="text-indent:2em;"><span style="color:#FF8C00">2. Occurrence pattern of early blight</span></p> <p style="text-indent:2em;">Tomato early blight is caused by infection by Alternaria solani. The pathogen can overwinter in soil or on seeds, spreads through wind and rain, and invades through stomata, lenticels, wounds or the epidermis, causing disease. The pathogen can infect repeatedly in the field, and the disease is severe during the peak fruiting period. When the temperature is 20 degrees, relative humidity is above 80 percent, or in rainy weather, the disease tends to become epidemic. Continuous cropping land, low-lying land, excessive watering or poorly ventilated plots suffer severe disease.</p> <p style="text-align: center;"></p> <p style="text-indent:2em;"><span style="color:#FF8C00">3. Control of early blight</span></p> <p style="text-indent:2em;"><span style="color:#008080">1. Chemical control of early blight</span></p> <p style="text-indent:2em;">In the early stage of disease, promptly remove diseased leaves, diseased fruit and severely diseased branches, and begin spraying fungicides. To prevent resistance and improve prevention, it is recommended to rotate, alternate or use mixed formulations, spraying once a week for three consecutive sprays. When the disease is severe, remove the central diseased plants and diseased leaves, and promptly adopt a control method combining Chinese and Western approaches.</p> <p style="text-indent:2em;"><span style="color:#008080">2. Agricultural control of early blight</span></p> <p style="text-indent:2em;">(1) Grow strong seedlings: adjust the temperature and humidity of the seedbed well, and separate the seedlings when they reach the two-leaf-one-heart stage, being careful to prevent the seedlings from becoming leggy. This can prevent disease during the seedling stage.</p> <p style="text-indent:2em;">(2) Crop rotation: tomatoes should be grown in a three-year rotation with non-solanaceous crops. Strengthen management: adopt high-ridge cultivation, fertilize reasonably, and after transplanting and seedling recovery, close the rows promptly to promote the growth of new roots. In greenhouses, control temperature and humidity well, and strengthen ventilation management.</p> <p style="text-align: center;"></p> <p style="text-indent:2em;">The above is what the Tuliu.com editor has brought you about what fungicide to spray for tomato early blight. We hope it is helpful to farmers. If you have any questions, you can leave a comment below, and I will reply to everyone promptly. See you next time.</p> <p style="text-indent:2em;"> </p>
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Symptoms and Control Methods of Tomato Leaf Mold
Tomato is a vegetable we often love to eat. But for growers, some diseases can cause tomato yield reductions. It is very headache-inducing. So today let's talk about the control of tomato leaf mold. Let's take a look together. 1. Symptoms of tomato leaf mold. Tomato leaf mold
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What does the pear psylla fear most? Teach you effective control methods
Friends who have never planted pear trees are relatively unfamiliar with the pear psylla, while those who grow pear trees at home should be fairly familiar with it. It is one of the main pests of pear trees in China, mainly because the larvae suck the sap from pear tree leaves and tender shoots, seriously affecting the yield and quality of pears.
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What is the best medicine for rice seedling blight? Detailed explanation of prevention and control methods
Rice is one of the important food crops in our country. The editor's grandmother likes to plant rice on the cultivated land every spring. When the editor visits grandmother's house during summer vacation, grandmother always goes to spray pesticides on the rice, among which rice seedling blight has been heard of. If rice develops
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A Detailed Guide to the Most Common Diseases of Luffa and Their Control Methods
Luffa is one of the most commonly grown vegetables. Every year when summer arrives, large amounts of luffa appear in our view, and the luffa bought at this time is also the cheapest. However, in 2018 the price of luffa stayed high, and when growers were asked the reason
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What pesticide should be used to control peach tree aphids? Master the timing of application and get it done in 3 rounds
The quality of orchard management has a major impact on the yield of a whole year. Among these, the peach tree aphid is one of the main pests of peach trees. If early control measures are not in place, it will cause severe fruit drop in peach trees. So what pesticide should be used to control peach tree aphids well? 1. Types of peach tree aphids
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Planting Conditions and Pest and Disease Control Methods for Sugar Mandarin
The original place of origin of the sugar mandarin was Shatang Village, Huangtian Town, Sihui City, which is also where the name "shatang mandarin" comes from. It is grown in the areas of Huaiji, Guangning and Xinyi City, but today Lipu County, Guilin City, Guangxi is the largest county for growing sugar mandarins in China. Sugar mandarins are rich
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Common Plum Tree Pests and Diseases and Key Points of Control Techniques
The plum tree is one of the more common fruit trees in everyday life, especially in the past, when peach trees and plum trees were grown in almost every household. Plum trees are relatively susceptible to pest and disease attacks during their growth. Today we mainly introduce common plum tree pests and diseases,
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