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What are the common diseases and insect pests of litchi? How should we prevent and treat it if we encounter it?

I think it has two meanings: First, the current lychee insect pests indicate that these lychees are early-maturing varieties. At present, it is very likely that they are March Red, because March Red has already appeared during the Spring Festival. Flowering, and now there are fruits with insect infestation, which is exactly the time for this problem to appear. It has high planting efficiency. However, during the planting process of lychees, pests and diseases are often infested. Common ones include stink bugs, star beetles, chafers, unicorn beetles, and stem borers, which seriously harm the yield and quality of lychee planting and require timely prevention and control.

Here are some tips for preventing and controlling common lychee pests. Some mature varieties have begun to bloom. Cultivating strong flower buds is one of the important measures to improve the fruit setting rate of lychees. Regarding how to strengthen buds, we can currently manage water and fertilizer, reduce the number of flower spikes, prevent shoot flushing, and prevent damage from diseases and insect pests. The specific answers are as follows for reference. flower fertilization). The amount of fertilizer applied depends on the amount of flowers and the potential of the lychee tree. Usually, 1 kg of compound fertilizer and 0.2 to 0.5 kg of urea are applied to the surface of each 50 kg tree. If you want convenience and root growth.

Use Zhijing Nongjin Shibao super-concentrated humic acid to fertilize with 400 times the liquid and wet it. During the nutritional period, the photosynthesis effect of leaves is poor in rainy weather and the nutrient supply is insufficient. It is necessary to replenish organic nutrients in time. One week before the lychees bloom, spray Yuhualing No. 2 80ml mixed with 30 pounds of water on the leaves to supplement nutrients, improve leaf photosynthesis, and strengthen buds. , improve its pollination and fertilization rate. It is called fertilizing after flowers).

The amount of fertilizer applied depends on the amount of flowers and the vigor of the lychee tree. Generally, for every 50 kilograms of tree surface bearing fruit, 1 kilogram of compound fertilizer plus 0.2 to 0.5 kilograms of urea is applied. If you want to be more convenient and beneficial to the root growth of the tree, For absorption, you can use Zhijing Agricultural Gold Shibao Super Concentrated Humic Acid Fertilizing Solution 400 times to wet it. Long flower spikes have poor flower quality, a small proportion of female flowers, and a low fruit setting rate. Especially for varieties with large flower spikes, the number and amount of flowers must be reasonably adjusted and controlled to increase the fruit setting rate. Artificially shortened flower spikes can reduce flower quantity and improve flower quality. The importance of flower spike stubbing depends on the variety.