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Cucumber root knot nematode disease control
After root-knot nematode harms, the symptoms of light plants on the ground of cucumber were not obvious. The growth of the plants was slow, the plants were dwarf and malnutrition, the veins did not stretch, they became curved and the melons were small and small. Plants are wilting at high temperatures and return to normal sooner or later or after watering. As the disease progresses, it cannot return to normal until the plants die. Pulling out the roots, you can see that there are many different large and small tumors on the lateral roots and fibrous roots, also known as root knots. It is generally white at the beginning and grows light brown afterwards. It is arranged in clusters and is dense when severe. Cut open the root knot, the disease organization has a small milky white nematode buried inside. Control methods: First, use Daejeon disease-free soil nursery. The second is to scrub the used tools such as shovels, melon shovels, etc., and the shoes worn by the sick to prevent the spread of infection. Third, chemical control, sowing or transplanting before, with phoxim, Milur, carbofuran, diazoxide and other nematicidal drugs spread all over the field. After planting, avermectins or chlorpyrifos were used to irrigate the roots. 0.5 liters per plant, irrigation 2 or 3 times, can control the hazards.
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