The ginger red leaf was originally a pest

Recently, the reporter found in the ginger field of Jiangnong Liu Jianguo, Zaohu Village, Dongxia Township, Qingzhou City, that many ginger leaves turned red, and some even the entire stem had red leaves, and the lower old leaves were serious. Gradually reduced, this situation was distributed in spots in the field of ginger, he used a few times the drug does not see the effect.

The reporter found that in this case, the ginger, although the leaf discoloration, but the leaves are complete, no lesions, it can rule out leaf diseases. So, is it because of the recent continuous rainy weather, stem rot caused by high temperature and high humidity? The reporter entered the field of Jiang Tian and opened the soil. No lesions were found in the base of the stem, and the root system was good. Therefore, it was also possible to exclude stem base rot. The reporter carefully observed the diseased stem and discovered a wormhole near the base of the surface of the stem. Therefore, it was basically possible to determine that the ginger leaves turned red because the pests ate the stalk.

The pest that normally harms ginger stems is ginger borerworm, also known as ginger borer, which is often referred to by vegetable farmers as "cutting insects." The ginger larvae burrow into the ginger stems to bite the food, eventually resulting in hollow stalks, resulting in impediments to the transport of water and nutrients, discoloring the ginger leaves, and eventually withering yellow leaves. Currently is in the expansion period of ginger block, Jiangyan once a large area of ​​damage, a great impact on the output of ginger, so it should focus on prevention and treatment. Although some ginger farmers use insecticides, but mixed with fungicides, only spray on the top of the leaves, there is no contact with the liquid stalk, so the middle and lower stalks become the focus of pest damage. The reporter recommended that farmers use pesticides alone, choose DuPont Kangkang (5 ml / bag, against 30 pounds of water) mixed with silicone additives, after the second dilution focus on the middle and lower stalks, can also be mixed with A-dimensional salt At the same time kill the adult and avoid its breeding on the upper part of the ginger.

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