The Reasons and Prevention of "Gang Xiaochao" of Ginger

The first is the impact of pests. The current weather is dry and dry, which is conducive to the reproduction and damage of pests such as hummocks and red spiders. These pests are mostly hidden in the young growing point of the Ginger stalk, and have been damaged on the back when the leaves have not yet been extracted, resulting in that the leaves cannot be properly extracted or expanded. It is necessary to seize the time to control with phalloides, ethylcarbazole, spironolactyl esters and other agents, and choose spraying when the pests are active in the morning and evening, focusing on the back of the leaves and the growing point. In addition, the release of natural enemies, such as grasshoppers, ladybugs, and predators, has a good inhibitory effect on red spiders.

The second is high temperature barriers. Geranium seedlings are not tolerant to high temperatures, and are most suitable for growth at 20-23°C. Growth at 26°C is hindered, and over 35°C can cause dry ginger leaves and even plant death. In particular, the high temperature and strong light around 2 o'clock in the afternoon will directly lead to the death of ginger buds, resulting in the deformity of new leaves, and later the grown leaves cannot stretch properly. The leaves and leaf margins of non-shaded ginger leaves were mostly dry and yellow, and the incidence of ginger “pulling lice” was significantly increased.

The third is improper watering and fertilization. Ginger's leaves are lanceolate. After water loss, they are easily formed into curled tubes on both sides. The cause of leaf loss is usually due to root injury or lack of water in the soil. The cause of root injury is one-time fertilization with excessive rooting, excessive watering, or failure to drain water immediately after rainfall. After the root injury, the absorption capacity is greatly reduced, the water can not meet the need of daytime leaf transpiration, and the leaves will naturally contract and curl. Especially in the recent period before and after the wheat harvest, the temperature is high, the light is strong, the rainfall is small, the air humidity is low, and the water evaporates strongly, which easily leads to the lack of water in the cells and the leaves cannot extend out normally. Pay attention to timely watering, ensure proper soil moisture and avoid drought.

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