1. Common pests and diseases of pear trees 1. Pear aphid: one of the most common parasites on pear trees. It likes to live on the leaves and intercept the nutrients of pear trees, seriously affecting the fruiting rate of pear trees.

2. Pear scab: It often occurs in the early stages of fruiting, causing abnormal fruit growth. The disease is often caused by excessive humidity.

3. Pear tree rust: rust-like spots appear on the leaves, and then slowly dry up; dry and necrotic ends appear on the fruit.

4. Pear heartworm: It is one of the parasites that pear trees are most afraid of encountering. Once discovered, the pears are hopeless and will rot.

2. Methods for preventing and controlling pear tree diseases and insect pests 1. Pear aphids (1) When pear aphids are found on pear leaves, remove them and burn them promptly to avoid infecting more places. In the early stage, they can be removed manually.

(2) In severe cases, spray 50% parathion emulsifiable concentrate 3000 times for control.

2. Pear scab disease (1) should be dealt with promptly after discovery.

Guosingling, terconazole, and black star quick powder are commonly used drugs to treat this disease.

(2) You can also spray 40% Nova Emulsion 800-1000 times for early prevention.

3. Pear tree rust (1) Spray 20% powdery rust EC 1500-2000 times for prevention in the prone season, twice a month for two months.

(2) If the disease occurs, treat it with 20% fenxinin 600 times solution.

4. Pear heartworm (1) Early prevention and treatment after the onset must be timely and pay attention.

(2) The infected fruits should be directly removed and taken out of the orchard for destruction. The surrounding trees should be immediately sprayed with pesticides such as chloride and urinide No. 3.