A string of reds is more susceptible to damage by the larvae (a caterpillar) and whitefly. The larvae of Spodoptera litura can occur from late April to October. Larvae like to gather damage on the back of the leaves, spread harm after being grown, feed on leaves and even flowers. When the larvae are old, they make a white thin loquat in their leaves. When the amount of larvae is small, manual hunting can be performed. A large amount can be sprayed with 80% pyrethroid insecticide 1000 times or 40% dimethoate 1000 times. The whitefly larvae are smaller and cluster on the back of the leaf to suck and suck the leaf juice, making the leaves yellow or fall off. The adult body is small and white, but its flying force is not strong. It is commonly referred to as the “little white mothâ€. The damage pattern is the same as that of the larvae, but the harmful parts are mainly concentrated on the tip. In addition, the large amount of honeydew discharged by the whitefly can easily cause coal pollution. Control methods: Use 80% chrysanthemum insecticide or 40% omethoate 1000 times to spray, spray on the back of the leaf must be evenly sprayed.
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