Shield worm because the round shell is very similar to the "shield" so named, its variety, and the scope of harm is very wide, the garden often causes the seedling tree weakening, and easy to cause other germs infestation, for the shield bug prevention and control technology, there are mainly the following points!
【1】Hazard characteristics of shield worms:
Covered with waxy mesohus, shieldworms parasitize a variety of trees, shrubs and herbaceous plants and are an important pest group of forestry, fruit trees, cash crops and ornamental plants. Most species parasitize the stems, branches, shoots, leaves and fruits of plants, while a few species also parasitize the roots and underground stem parts.
【2】Characteristics of different types of shield worms:
1. Some types of male and female shield shells are completely different: the female shield shell is condensed into flakes by wax liquid, and the nymph molt is in the center or edge of the wax piece; the male shield shell is formed by wax powder knots, and there is often a longitudinal groove on the back, and the nymph molt is at the front of the shield shell.
2. Some species of male and female shield shells are exactly the same, but there are 2 nymph molts on the shield shell of females, while there is only 1 nymph molt on the shield shell of males.
3. There are also some species that do not have a shield shell made of secreted wax, but rely on the last molt of nymphs, and female adults lay eggs and multiply in the molt of potential nymphs.
[3] Prevention and control measures of shield borer:
1. Strengthen garden management: The trees planted should be ventilated and transparent, enhance the tree potential, and improve the ability to resist diseases and insects. When pruning in winter, remove excess inner branches and branches with more parasitism of insects, and remove fallen leaves in time.
2. When the hazard occurs, you can use a bottle of Qilin Qifa with 150 kg of water for spray prevention and control, and pay attention to spraying evenly.
