What diseases does lettuce have? How to prevent and control lettuce diseases

Lettuce is a favorite cash crop for many farmers, but some diseases often occur during the planting period, which reduces the yield of lettuce and affects their economic income. In order to prevent the occurrence of lettuce diseases, I have specially sorted out the common diseases of lettuce and their prevention and control methods. Now I write it down and share it with everyone, so that farmers can easily understand what diseases lettuce has and their specific prevention and control methods.

What diseases does lettuce have? How to prevent and control lettuce diseases

1. Lettuce stem cracking

The most common disease of lettuce is a large number of cracked stems during its growth period. It belongs to the category of physiological diseases. This situation is mostly caused by the lack of trace element boron in the soil. In order to prevent the occurrence of this disease, it is best to apply enough base fertilizer containing boron before planting lettuce. In addition, spraying boron fertilizer on the lettuce leaves during the growth period can also reduce the probability of cracked stems.

2. Viral diseases and downy mildew of lettuce

Viral diseases and downy mildew are also common diseases of lettuce during its growth period. To prevent the occurrence of viral diseases, drugs should be sprayed on the 5th to 7th day after the emergence of the seedlings. Ningnanmycin and Repezinc are both good choices. To prevent downy mildew of lettuce, it is necessary to spray drugs in time before the lettuce becomes ill. The spraying time should be between ten and fifteen days after the lettuce is planted. The drugs can be Antaisheng or Yinfali.

3. Pests during lettuce growth

There are also some insect pests that may occur during the growth period of lettuce, such as cabbage worms and diamondback moths. To prevent these pests, you can use the drug lufenuron to kill the insect eggs before the insects are found, or you can spray the lettuce with the drug flubendiamide after the pests are found, both of which can have a good insecticidal effect.