What medicine is most effective for scale insects?

There are many kinds of scale insects, and there are more than 40 common species that harm seedlings. Mainly include: mulberry bark scale, straw sandals scale, pear scale, crape myrtle scale, cotton blowing scale, Bai Dun scale, wheel shield scale, ball scale, etc. This is very harmful, especially when the plants are dense.

Prevention and control methods are:

(1) Quarantine measures Scale insects are inactive or have poor mobility, and their own transmission ability is limited, but they are easy to spread with the transportation and exchange of seedlings. So quarantine is particularly important.

② Cultivation techniques to prevent improper rotation; Thoroughly clean up the garbage in the nursery; Reasonable drainage, ventilation and light transmission; Pruning insect branches and centralized burning; Manually and mechanically remove with a soft brush; Or wipe it with a rag dipped in kerosene.

(3) When a large number of chemical control occurs, the mixture of 1 times 10 ~ 15 times of turpentine can be sprayed in winter to eliminate overwintering female insects; Spraying 3 ~ 5 Baume lime-sulfur mixture before spring germination to eliminate overwintering larvae; The newly hatched larvae should be sprayed with pesticides such as carbaryl and phoxim on the soil surface around the roots in early spring, and the nymphs on the trees can be sprayed with omethoate, malathion, dichlorvos and phoxim.

④ Protect natural enemies, some ladybugs, aphid bees and jumping bees.