Fusarium wilt, also known as wilting disease and vine disease, often causes devastating losses. In the event of disease at the seedling stage, the cotyledon was wilted, the true leaves were green and yellow, and the young stems rot only with filamentous fibers and died. The symptoms were similar to those of cataplexy. However, after a large number of morbidities have occurred in the squash, the diseased plants often show poor growth, dwarfing plants, small leaves, dark green color, and gradually retreating green and yellow from the bottom. Afterwards, the entire plant or local vines are wilted during the day and recover sooner or later. After 5 days, it withered and died. The following five methods are commonly used to effectively control this disease and reduce melon farmers' losses.
First, soak the seed with warm water at 55°C for 10-15 minutes before sowing, or soak the seeds with 500% solution of 50% carbendazim WP for 1 hour. After soaking, wash and then sow germination to treat both diseases such as anthrax.
The second is to implement rotation. "Watermelon's suspected ground" and "melon is not heavy" is a summary of the long-term production experience of melon farmers. Therefore, Guatemala must implement a rotation system, which should generally be repeated at least once every three years. Every year, we must concentrate on the destruction of diseased vines and dead leaves, and implement deep-turning and soil reforms to reduce the source of bacteria in the soil, create favorable conditions for root development, and increase resistance to disease. Seed beds and greenhouses should be replaced with new soil each year, or with 50% carbendazim, thiophanate-methyl, etc., applied to the seedbed at a dosage of 1.5 to 3 kilograms per acre, mixed and leveled and sown.
The third is to change the ditch planting to ditch planting or high ridge planting, the implementation of irrigation, to ensure that the ditch water flow, so that the plant rhizosphere soil is well ventilated, roots robust, while preventing manure and water source bacteria, so as not to expand the spread.
The fourth is the old melon area with severe incidence every year. Each mu can use 70% thiophene benzol 0.8 kg or 10% carbendazim 4 kg, and add 40~50 kg of fine soil to mix thoroughly. It has a good effect on wilt disease and can also control the occurrence of melon powdery mildew.
The fifth is to use 70% thiophanate-methyl 1000 to 2000 times or 50% carbendazim 2000 to 2500 times the implementation of irrigating the roots of the disease, each irrigation 150 to 200 milliliters, can prevent germs from dipping melon root, and inhibit the dimension The growth of bacterial cells within the bundle. When the soil moisture is high, it is necessary to strengthen the cultivator after the root irrigation, control the soil moisture, and improve the soil ventilation conditions so as to fully exert the efficacy. Severe wards may be irrigated once again for 10 to 20 days depending on the condition.
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