Sangba is the main pest that damages fruit trees and forestry. In recent years, it has also occurred in the Schisandra tree, causing serious damage.
Hazardous symptoms: Clusters of female adults and nymphs suck sap on sticks, and severe shoots of scale insects overlap to form grey white stars. Damaged tree weakened, and heavy branches or all trunks died.
Occurrence pattern: two generations a year, wintering on branches with fertilized female adults, egg laying in the oyster shell in May, each female adult can lay hundreds of eggs, both nymphs and adults can suck branches, leaves and fruit surface. In the second generation, the adult females entered the wintering state from August to September.
Control methods: Combine pruning and cut off damaged branches. Nymphal control, from late May to early June, when the nymph hatch rate of 70% to 80%, with pyrethroids control.
Hazardous symptoms: Clusters of female adults and nymphs suck sap on sticks, and severe shoots of scale insects overlap to form grey white stars. Damaged tree weakened, and heavy branches or all trunks died.
Occurrence pattern: two generations a year, wintering on branches with fertilized female adults, egg laying in the oyster shell in May, each female adult can lay hundreds of eggs, both nymphs and adults can suck branches, leaves and fruit surface. In the second generation, the adult females entered the wintering state from August to September.
Control methods: Combine pruning and cut off damaged branches. Nymphal control, from late May to early June, when the nymph hatch rate of 70% to 80%, with pyrethroids control.
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