1、 What about the worm

Long insects are inevitable in the process of yam breeding. In order to prevent pests, we need to turn deeply before winter and turn the eggs out of the table, so that they can freeze to death in winter and will not cause pests after spring. At the same time, sufficient organic fertilizer can also be applied, and sufficient fertilizer can improve the insect resistance of plants. If pests have occurred, it is necessary to arrange a little poison bait around to attract pests to swallow and poison them. It is also possible to use methyl isosalix solution to irrigate the roots to eliminate pests

2、 What are the pests

1. Grub: grub is the larva of beetle. It will harm a variety of plants and vegetables. It usually feeds on seeds, roots, tubers and seedlings. It often occurs in spring and autumn. It will drill holes in yam, which will not only affect the yield, but also induce diseases, resulting in plant death. Black light can be used to trap and kill adults, or phoxim can be used to destroy larvae

2. Mole cricket: this pest is widely distributed in China. It mainly damages crops in spring and autumn, especially in May, and the second damage period is from August to September. Generally, it can be hunted and killed manually. Usually, before waking up in spring, it will be removed from the mound and destroyed. In addition, you can also use horse dung to lure and kill. If you put poison bait, the effect will be better

3. Aphid: aphid is also one of the common pests. It mainly sucks the juice in the yam stem, resulting in poor plant growth and affecting the yield. Drugs are usually used for control, such as marathon emulsion or fenitrothion emulsion. Mix it into 1000 times liquid and spray it on pests to kill them. You can also spray pepper water or washing powder water

4. Thrips: like aphids, thrips will also suck the juice from tender stems or leaves, which will cause the tender shoots of yam to curl and wither, reduce the effect of photosynthesis, and thus affect the accumulation of nutrients. Generally, imidacloprid, acetamiprid and other chemicals are used for control. Because it comes out at night, it is often sprayed in the afternoon, and the effective period is long