Damaged crops: apples, pears, apricots, peaches and plums, cherries, jellyfish triangle Maple silk escargots, red leaves, azaleas, mountain peaches, apricot cherry blossoms, and hawthorn.
Injury: Nymphs and female adults are sucking sticks and leaf sap, and excretion of honeydew often causes coal disease, affecting photosynthesis and weakening the tree's vigor.
Morphological characteristics: Adult females are nearly spherical, 4.5 mm long, 3.8 mm wide, and 3.5 mm high. The anterior and lateral sides are concave and the back is vertical. In the early stage, the shell was soft tan and brown and dark brown to dark brown later. The surface was covered with a very thin wax powder. On each side of the dorsal midline, there were small pits with irregular l columns. There were white wax powders on the sides of the shell cutting and the branches. .
The male body is 1.5-2mm long, the wingspan is 5.5mm, the head chest is red and brown, and the abdomen is light yellow-brown. Tentacle filament 10-section, raw yellow short hair. The white wings of the fore-wing are translucent, and the rear wings are specially balanced. Each side of the base of the Spurs has a white waxy filament.
Egg oval, 0.3mm long, 0.2mm wide, with wax powder, early white gradient pink.
Nymph nymphs were hatched and nymphs were oblong, flat, 0.5 mm long, pale brown to pink whitish; antennae filamentous 6; eye red; well-developed; body back 10 nodes visible, ventral 13 nodes, abdomen not 2 Small protrusions, one hair each. After fixation, the body's side secretes a curved white wax covering the back of the body, making it difficult to see the body. After wintering, the male and female were differentiated. The females were ovoid, and the dorsal bulge was hemispherical. There were several purple and black stripes on the light yellow-brown. Thin and oval, with slightly raised back.
Only males.蛹 1.8 1.8mm long auburn; 茧 long oval gray translucent, flat back slightly arched, there are 2 longitudinal grooves and several transverse ridges, the end of a transverse joint.
Life history and habits: 1st generation, wintering on branches with 2nd instar nymphs, covered with wax. In mid-March, he began to remove the wax from the quilt and find another fixed point, and then the male and female differentiated. Male nymphs began to secrete paraffin wax in early April. Feather mating began in mid-April and the female quickly expanded after mating. In the middle of May, spawning period is around. Each female lays over a thousand eggs. The egg period is about 7 days. Late May to early June is the incubating period. The newly hatched nymphs spread to the branches and back of the leaves, and the insects on the leaves before the leaves turned back to the branches. Most of the leaves and crevices were at the top. At this time, the nymphs developed extremely slowly, and they peeled off the skin once before wintering. After mid-October, they passed winter under the wax of the 2nd instar nymph. Male to female ratio 3:1. Females live for about 2 days and can mate with several females. Eggs from unmated females can also hatch. The most severe damage occurred from late April to mid-May. Natural enemies: Black-edge red ladybugs and parasitic bees.
Prevention and control method When the buds are swollen, spray the Baume 5 degree lime sulfur or 45% crystal lime sulfur 300 times, and the oil oil content of 4-5%, as long as the spraying effect is obvious.
Germination warm 10 to 30 ℃
While the number of days 7 to 10
Grow warm 10 to 30 ℃
The northern spring sowing, southern spring and autumn season two can sow, spring sowing 3-6 month, when can blossom;Autumn sowing blossom in April the following year.After turns the soil around the seed diameter 2 times, 10-12 days of emergence, pay attention to the watering fertilizer during the growth.Heat and drought resistant to cold, like the sun, also resistant to half overcast, loose soil should be well drained.Nature chrysanthemum colour is gorgeous, long flowering, cultivation management is simple, as a flower bed material, the greening effect is remarkable.
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