Sycamore planthopper
The morphological adult is 5.6 to 6.9 mm long, yellowish green, transverse width of the head, deeply parted top, forehead exposed, compound eye hemispherical protruding, brown antennae yellow, wings colorless and transparent, wing veins yellow, claws black; yellowish belly back, brown ribbon in front of each node. Egg spindle-shaped, 0.5 to 0.8 mm long, slightly transparent, yellowish or yellowish brown at birth, reddish brown before hatching. When the nymphs are newly hatched, they are oblong, 3.0 to 5.0 mm long and dark in color, and the wing buds are obviously visible.
Occurrence regularity occurs for 2 to 3 generations a year, overwintering with eggs in the cracks in the bark. The first generation nymphs appeared from late April to early May, secreting wax hairs and mucus, polluting tourists' clothes and the ground. The nymph is 3 years old and lasts for 30 days. The first generation of adults appeared in early June. The peak period of Eclosion was in the middle of June, the second generation pests began to appear in late June, the active period was in the middle of July, the second generation adults emerged in the middle of August, the nymphs of the third generation were damaged in early September, and the generation overlap was serious. The adults gradually laid eggs in late October and overwintered.
Nymph hatching and adult Eclosion peak period should be selected for control.
1. Inject organophosphorus pesticides, omethoate, monocrotophos and so on into the tree.
two。 Spray 1000 times of aphid lice and 2000 times of imidacloprid.
3. To protect natural enemies such as parasitic wasps and lacewings.
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Biological characteristics, ecological characteristics, seedling raising and afforestation techniques of sycamore
Chinese sycamore (Firmianasimplex (Linn). W.F.Wight) belongs to the genus of sycamore (Sterculiaceae). Deciduous trees with height of 15m and 20m, DBH of 70cm. The trunk ends are straight and the bark is green when young and gray-green when old. The twig is green. Leaves suborbicular, leaf long 30cm, leaf width 11~20cm, simple leaves alternate, 3-5 palmately parted, petiole as long as leaf, base cordate, lobe apex
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Sycamore family
Latin name: Sterculiaceae English name: introduction to SterculiaFamily: trees or shrubs, sparse herbs or vines; often covered with stellate hairs; stem bark rich in fiber, often mucus. Leaves simple, palmately compound, alternate, sparsely opposite, stipules caducous. Inflorescences axillary, sparsely terminal, panicle, Cymes, racemes or corymbs, sparse flowers solitary; flowers unisexual, polygamous or bisexual; sepals 5 (3-4), slightly connate or separated, valvate; petals 5 or absent, separate or basally connate with androgynophore.
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