Strawberry color, smell and taste are all excellent, so the market consumes a lot. However, pests and diseases are often accompanied by plant diseases. The phenomenon of dead seedlings also continues to occur. This is mainly due to the long continuous cropping of strawberries, which has led to the serious occurrence of soil-borne diseases. At present, there are mainly root rot, verticillium wilt, and wilt disease, all of which are serious devastating diseases. Root rot Disease characteristics: According to the symptoms of the disease, strawberry root rot is divided into strawberry root rot, strawberry white root rot and so on. According to the season of onset, it is divided into acute and chronic. It occurs acutely in spring and summer. After the rain, the tip of the leaf withered, causing the whole plant to rapidly wither. The chronicity often occurs in autumn and winter. After the onset of the disease, the lower edge of the old leaf becomes purple. Or purple-brown, wilting or dead plants. Control methods: Chemicals can be selected for quick-release, thiophanate-methyl, carbendazim, acetaminophen, and Kelu wettable powder. Physical control can use methane to fumigate soil. At the same time, the use of sunlight to sterilize soil can also reduce the amount of soil pathogens, inhibit root rot, and increase yield. In agricultural control, we mainly avoid the cultivation of viscous soil, drain water in time, implement rotation cropping, and use resistant varieties. Verticillium wilt Disease characteristics: the young leaves of the diseased seedlings become greenish or yellowish or deformed. The leaflets are small and boat-shaped. The leaflets on both sides of the compound leaf are asymmetric, showing deformities, most of which become hard and yellow leaves. The diseased plants grew poorly and lifeless. The surface of the leaves was rough and dull, withering and browning from the leaf margins, and finally the plants died. The vascular bundles of the underground roots, petioles and stems are browned or even darkened. Control methods: The control effect of chemical control on strawberry Verticillium wilt is poor, so the prevention and control should pay attention to the application of comprehensive prevention and control measures. Planting disease-free and robust seedlings, where the disease-free parent strains can be obtained by space seedlings, that is, cut off before the tip of the pods touches the ground, insert into the disease-free soil, make them rooted, and use the seedlings as mother plants, and at the same time Pay attention to timely top dressing and pull out weeds to avoid continuous cropping for more than three years. Blight Disease characteristics: Strawberry wilt disease mainly affects the root, flowering to harvest can occur. The upper part of the leaf is yellow-green or yellow at the beginning, curled, and the surface is rough and dull, and the leaf edges are brown, wilt and dead. The diseased plant was short, the leaves were dull, and the old leaves were purplish red and eventually the whole plant died. Control methods: Strawberry wilt disease is one of the major diseases that damage strawberries. Chemical control methods can be used to control strawberry by choosing fungicide such as chlorothalonil, mancozeb, tetoxyl, formalin, thiophanate-methyl, benzoate, carbendazim and thiophanate-methyl. Fusarium wilt. At present, the use of methyl bromide fumigation soil to overcome the hazards of continuous cropping, but methyl bromide is a highly toxic gas, not only harmful to humans and animals, but also destructive to the atmosphere, and the high cost of use. With the development of science and technology, antagonistic antibacterial agents have been used to control strawberry blight. Bacterial wilt Characteristics of the disease: In the early stage of disease, 1~2 pieces of the lower leaves of the strawberry plants withered and shed, and the petiole became purple-red. The plants were stunted. As the disease progressed, some leaves suddenly lost water, the green remained unchanged, and the green leaves wilted. The leaves drooped like scald. . Control methods: The prevention and treatment of strawberry bacterial wilt should be mainly used to nurse seedlings, reduce root injury, sorghum deep groove, rational close planting, pay attention to timely irrigation and drainage, to prevent the soil too dry and wet. The field should be dry after the rain to prevent accumulation of water; timely removal of old leaves, diseased leaves, increase ventilation and light conditions. Before colonization, 80% chloropicrin or solar energy can be used for disinfection; diseased plants were found to be excavated and burned in time, and the diseased cavities were perfused with 20% lime water or 2% formalin to disinfect. At the beginning of the disease, 72% of agricultural streptomycin sulfate soluble powder 3000 times, or 47% Garethon WP can be used 600-800 times, and 72.2% Precise water-soluble liquid 800-1000 times. Baby Squid,Baby Octopus,Poulp Squid,Squid Tube GOLD STAR FISHERY ZHOUSHAN CO.,LTD. , https://www.goldstar-aquatic.com
What are the main soil-borne diseases in strawberry, and its prevention and control