Common Autumn Diseases of Tomatoes and Their Control Methods
Tomatoes have a very distinctive flavor; they can be eaten raw as a fruit or stir-fried as a vegetable, and many friends especially love to eat tomatoes in cold dressed salads. Growing tomatoes is very common in rural areas, but there are also large-scale planting areas. Its growing method is relatively simple, but what needs attention is the occurrence of diseases, especially in autumn, when the disease incidence rate of tomatoes is the highest. So what are the common diseases of tomatoes in autumn? How should they be controlled? Let's take a look together!
1. Early blight
Disease characteristics: Early blight harms leaves. In the early stage of leaf infection, round brown lesions appear. It occasionally harms stems and fruits. The disease characteristics on stems and fruits are similar to those on leaves. Under humid conditions, many small black spots will appear on the lesions.
Control methods: Do a good job of disinfecting the orchard, and remove all diseased branches, leaves, and fruits from the orchard. After the disease occurs, spray control can be carried out with drugs such as mancozeb or chlorothalonil wettable powder, once a week for one month.
⟦NL>2. Leaf mold
Disease characteristics: Leaf mold mainly harms fruits. In the early stage of fruit infection, the disease starts from the fruit stalk, where there are sunken patches. Patches of varying shapes appear on the leaves, causing the leaves to gradually turn yellow and withered, and later to die and fall off directly.
Control methods: Its control methods are almost the same as those for early blight. Diseased fruits and leaves need to be removed in time. Then disinfect the orchard and spray with drugs such as procymidone wettable powder. The timing and frequency are the same as for early blight.
3. Late blight
Disease characteristics: The harm of late blight to tomatoes is very great. It develops especially quickly and is extremely contagious. It mainly begins to develop on leaf stalks and stems. Obvious problems appear in seedling growth and the seedlings begin to lodge. Colored patches appear on the leaf surface, and under humid conditions mold spots appear on the patches. In the later stage of the disease, the affected fruits become very hard.
Control methods: Late blight is mainly prevented. Do a good job of intertillage and hilling in the orchard, regularly disinfect the orchard, and then spray drugs such as metalaxyl for control, once a week, about 4 sprays.
4. Gray mold
Disease characteristics: Gray mold harms the stems and leaves of tomatoes. Green patches appear on the surface of the fruit skin and are accompanied by gray mold spots. The patches are also not affected by leaf veins. In a moist environment, the speed of disease development and spread accelerates. The symptoms of infected fruits are similar to those of leaves.
Control methods: First, when we plant them, we should carry out preventive work by using drugs such as carbendazim wettable powder to spray and control the seedlings and eliminate bacteria. When spraying flowers, an appropriate amount of anti-gray-mold agent can be added to the water for prevention. After the disease occurs, use procymidone wettable powder for sterilization.
The above are the diseases often encountered when growing tomatoes in autumn. These are what we must pay special attention to, because if the diseases are not treated in time, the harm to tomatoes will be very great. Of course, it is not only these diseases; for example, there are also viral diseases and bacterial wilt. That is all for today's introduction. If you want to learn more related information, please continue to follow us!