Tomato 28 star ladybug prevention
Damage characteristics: mainly damage eggplant, tomatoes, but also harm melons and beans vegetables. Adults and larvae pluck leafy flesh on the back of the leaves, forming many unique irregular translucent fine veins, sometimes eating the leaves empty or leaving only veins. The whole plant died when severe. The victim's fruit often cracks, the internal tissues are stiff and bitter, and the yield and quality decline.
Morphological characteristics: adults 7-8 mm in length, hemispherical, auburn, densely yellow-brown hairs on the surface. The front edge of the thoracodorsal plate is recessed, and there is a large sword-shaped stripe in the center, with two black spots on each side (sometimes synthesizing one). There are 14 dark spots on each of the two elytra wings, and the three dark spots on the base of the eel wing and the four dark spots on the rear are not on a straight line. The egg is 1.4 mm long, stands vertically, bright yellow, and has vertical stripes. The larva is about 9 mm in length, pale yellow-brown, oblong-shaped, and its back is uplifted with black stings on each node. It is about 6 mm long, elliptical in shape, light yellow in colour, with sparse hairs and black markings on the back. The tail is covered with young skins.
1. Prevention and control methods: artificially capture and kill adult worms: Using adult dead habits, beat the plants to make them fall and then kill them. Eradication of overwintering insects in plant residues, weeds, etc., artificial removal of egg masses, spawning of these insects in groups, bright colors, easy to find.
2. Chemical control: To seize the timing before the larvae are dispersed, use 2.5% deltamethrin EC 3000 times, 2.5% Kung Fu EC 4000 times, or 40% chlorpyrifos EC 800 times, or 4.5% efficient Cypermethrin 3000-3500 times, or 2.5% Kung Fu EC 3000-4000 times liquid and other agents spray, spraying every 7-10 days, a total of 2-3 times.
It is mainly used for urban intersection,
highway crossing, toll channel, garden, residential quarter, parking
lot, garage, gas station and other places. It can also be used for
separation of road racing road and separation of human road. All kinds
of exhibition halls are isolated and used to maintain the order of the
exhibition hall. It can also be used in sports field, to isolate the
track, avoid other people to walk freely, and cause unnecessary injury.
The main materials are rubber, PVC, etc.
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