Recently, a vegetable farmer discovered in the ginger field that many of the ginger leaves turned red, and some even the entire stem had red leaves, and the lower old leaves were serious and gradually reduced upwards. This was the case in Jiang Tian. Spot distribution, he used a few drugs did not see the effect.
The author found that in this case, the ginger, although the leaves were discolored, the leaves were intact, no lesions were found, no lesions were found at the base of the stem, and wormholes were found near the base of the stem, so the ginger leaves turned red. It may be caused by pests gnawing on stems.
The pests that normally harm ginger stems are ginger pods, which are often referred to by vegetable farmers as "trap 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. Once Jiangyan has a large area of ​​damage, it will have a great impact on ginger production. Therefore, it is necessary to focus on prevention and control at present. 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 author recommends that farmers use pesticides alone, choose DuPont Kangkang (5 ml / bag, 30 pounds of water) mixed silicone additives, after the second dilution focus on spraying the lower stem, can also be mixed with the 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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