Flowing glue thickens the twigs of Sabina vulgaris, and the new branches stop growing. What is the reason? How to prevent and cure?

Except for man-made mechanical damage, most of them are caused by rust infection. Rust is a kind of transferred host fungus, which lives alternately with pears and apples, and is a widespread disease in China.

Prevention and control methods: ①, such as pears, apples and other fruit trees within 8 kilometers, should be comprehensive control, otherwise it can not be eradicated due to the relationship between the forwarder. The ② was removed, washed and buried deeply. ③ was sprayed with Bordeaux solution of 1 rig 0.5 rig 160 once every 5 to 7 days for 2 to 3 consecutive times, and had inhibitory effect.