Medicinal Plants Pesticides

Scientific name Macrossiphoniella sanborni (Gillette) Homoptera. Alias ​​Ju Ji Chang Guan Yu. Distribution of Liaoning, Hebei, Shandong, Beijing, Henan, Jiangsu, Zhejiang, Guangdong, Fujian, Taiwan, Sichuan and other provinces. Host Atractylodes, chrysanthemum, Ai, wild chrysanthemum and so on. The damage characteristics are often caused by sucking juice on the leaves and stems of the host chrysanthemum. When spring chrysanthemums sprout buds and leaves, clusters can also harm new shoots and new leaves, causing new leaves to be difficult to spread, and the elongation and development of stems are affected; in autumn, flowering clusters are damaged by pedicels and buds, and flowering is not normal. The yellow leaves caused by the damage caused by Atractylodes macrocephala, plant atrophy, poor growth, and the secretion of honeydew covered with foliage, photosynthesis was affected.

Morphological characteristics The wingless orphan females are 1.5mm long, spindle-shaped, dark brown to dark brown, and glossy. The tentacles are longer than the body, with the exception of 3 shades of light, the remainder is black. Abdominal tube is cylindrical, with a wide wavy pattern at the base and a tapered mesh pattern at the end. The ventral tube and tailpiece are all black. The winged female is 1.7mm long and has 2 pairs of wings. The markings on the chest and abdomen were more pronounced than the wingless ones. The length of the antennae was 1.1 times the body length, and 9-11 hairs were born on the tail piece.

Life habits are about 10 generations old. In the warm southern parts of the country, Chrysanthemum species are found throughout the year. Generally, they do not produce winged cockroaches. Many wintering species live on the host plants of the Asteraceae family. After the medicinal plants such as chrysanthemum and Atractylodes survived in April of the following year, the winged cockroach migrated to the plant to produce a wingless orphaned cockroach to reproduce and damage, and the victim was heavy from April to June. After June, the temperature increased, the rainfall was high, and the amount of earthworms decreased. After August, the amount of insects rose slightly. In the autumn, the temperature dropped and began to produce winged females. It also migrated to other Compositae plants for wintering. The worm is an important pest of Atractylodes macrocephala. Apart from direct damage to Atractylodes macrocephala, it can also spread venom, so at the same time from April to June this year, the virus of Atractylodes macrocephala became serious. Natural enemies include badger bees, food flies, ladybugs, grasshoppers, and predators.

Control methods (1) Protection and utilization of natural enemies and control of natural enemies. (2) Atractylodes adult plants coated with 40% dimethoate EC 10 times the main stem 5cm long, can receive very good control effect. (3) If necessary, spray 10% imidacloprid WP 2000 - 2500 times or 20% imidacloprid (Confodol) Concentrate Solvent 2500 - 4000 times, 50% quebracho pine EC 1000 - 1500 times, 40% Emulsifiable concentrate 1000 times, 50% anti-inferiority WP 1000-1500 times. (4) The potted 8% omethoate microgranules are sprinkled on the surface of the pot, then covered with thin soil. After watering, the insecticidal activity is started.

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