Plum Pseudoscutis (Sphaerolecanium Prunastri)

Pest Type: Fruit Pest

Row: Equine – Homoptera

Family: pads – Coccidae

It is found everywhere. It damages plums, cherry plums, apricots, peaches, cherries, cherries, thorns, and occasionally an apple tree.

Female 3-3.5 mm long, dark chestnut or dark brown; antennae with 6-7 segments. Male 1.5 mm, matte black, winged, antennae with 10 segments. Egg – 0.38 mm, oval, rusty yellow.

The larva of the second age 1-2 mm long, oval, somewhat convex, with a small median keel of red color and transverse rows of black spots; the back surface is covered with a thin transparent waxy coating; 19 pairs of setae along the edge of the body.

Larvae of the second age overwinter on the bark of branches with a diameter of 1.5-2.5 cm. In spring, at a temperature of 6-7 ° C, the larvae begin to move in search of suction points. Females appear in May. In the period of isolation of buds at the plum, they reach a maximum size and begin to lay eggs.

Sexual reproduction, but parthenogenesis is also possible since the number of males in the population is from 10 to 80%. During the laying of eggs, the dorsal surface of the female’s body becomes substantially hard. The female lays eggs under the abdomen, which is gradually pulled in and pulled to the dorsal side of the body. All the space that is freed is filled with eggs. The body of a dead female performs a protective function. Larvae regenerate 10-30 seconds after laying eggs. The female lays eggs for 16-20 days, the entire population from the end of May to the end of July. Fertility ranges from 550 to 3,000 eggs. Larvae stick to the bark of branches at the site of regeneration. During the summer, they slowly grow, molt once, and, having reached a second age, remain until spring. Annual generation.

The exhaustion of juices and the influence of saliva enzymes inhibit the growth of plants, cause the leaves and generative organs to fall, and the branches and shoots to dry out. A significant pest population for several consecutive years leads to drying out of the trees.

Mass death of unjustified grafts occurs in winter at temperatures below -27 ° C. In addition to many carnivorous arthropods, its entomophagy reduces the number.

The protective measures are the same as for the acacia false shield.

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