Pest control methods for oleander

1. aphid

Harm: Adult aphids gather on the tender branches and leaves of oleander and suck the sap, causing the leaves to become rigid, the flowers to become smaller or to bloom abnormally.

Prevention and control methods: After discovery, spray the plants with 800 times diluted 40% DDT emulsion, or water soaked with cigarette butts. If the amount is small, you can also use a brush to brush it off. For other prevention and control methods, please refer to the rose and salvia pest and disease control section.

2. Scale insects

Harm: It lives on branches, leaves or fruits, causing yellowing of leaves, withering of branches and shoots, decline of tree vigor, and easily inducing sooty mold disease.

Prevention and control methods: You can use a moderate amount of 50% oxydemeton-methyl emulsion (or 80% dichlorvos emulsion) plus a new lipid film and spray it on the front and back of the leaves. Spray once every 5 to 7 days and spray continuously for more than 3 times. The effect is very good.

3. Wax mealybug

Harm: It mainly concentrates on the young leaves, axils and base of leaves of oleander by sucking the juice, causing the branches and leaves to twist and the leaves to shrink. The insect overwinters as adults and nymphs in cracks of branches and rolled leaves, and begins to move and cause damage in the spring of the following year.

Prevention and control methods: When wax mealybugs are found, a small number of insects can be picked out with tweezers and killed; when the occurrence is more serious, when a large number of eggs of each generation of wax mealybugs are hatching, spray 1500 times diluted 40% oxydemeton-methyl emulsifiable concentrate or 80 times diluted acaricide for prevention and control; you can also spray 1000 times diluted 1.2% nicotine emulsifiable concentrate for prevention and control.