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1. Morphological characteristics Adults are brown small moths with morphology like mosquitoes. The division of the fore wings is to the middle of the wings. The hind wings are divided into three parts and reach the base. Each piece is densely feathered. The foot is slender and has a prominent "distance."
The larvae are long, cylindrical, small and short, with a pale green colour in the beginning and turn red after feeding on the florets. It is also known as red nematode. Eggs are small and hard to see.
2. The occurrence of regular bird feather moths occurs several generations a year. Adults live in a nocturnal position and spend days in the carambola crown. In the early morning and early evening, they spawn on the back of the leaves. The larvae eat small flowers and young fruit after hatching, and also see shoots or leaflets. The larvae matured after 6 to 7 days, and the old larvae spit down and fall into the earth. The carambola in the Pearl River Delta region can be flowered from March to November, and flowering can reach more than four years per year. Each flowering period may be jeopardized by the larvae of the beetle moth, with the largest population density and the most dangerous one being the Xiaoshu. Before and after, the positive result of the second flower. In the prevention and control, the application of pesticides should be started as early as possible in the first flowering period, and the density of worms in the second flowering period should be reduced to protect the positive fruit.
3. Prevention and control methods (1) Agricultural control Winter garden clearance, removal of litter and concentrated burning, and cultivating and weeding, the harmful orchard should immediately spray 90% of trichlorfon 800 times on the ground and leaves to eliminate the source of overwintering insects. .
(2) Chemical control Spray the pesticide 1 to 2 times during the first and second flowering stages, and use 90% crystals of dipterex 1000 times, or 1.8% sapogenin 1500 to 2000 times, or 48%. Le Si Ben EC 600 to 800 times liquid. Attention should be paid to the use of sprays and sprays. Spraying as much as possible on the ground and on the trees should be used. This will have a significant effect on the larvae that kill earthworms and adult eclosion.
Prevention and treatment of carambola bird feather moth
Carambola bird feather moth, Lepidoptera, feather moth family. Taking larvae to eat flowers and young fruits, resulting in falling flowers and falling fruit, resulting in reduced production, is a common pest in the carambola producing areas.