The latest hollow causes and control measures of lettuce

Lettuce is a kind of popular vegetable, which tastes crisp and tastes good, and is deeply liked by people, but farmers find that lettuce is hollow in production, which brings great economic losses. So what causes the hollowness of lettuce? Come and have a look with the editor.

1. Related to variety

The resistance of different varieties of lettuce is different, the varieties with higher resistance are not easy to appear hollow phenomenon and stem cracking phenomenon, but Europe with poor resistance is very prone to hollow phenomenon.

Preventive measures: choose lettuce varieties with strong resistance and not easy to hollow according to local conditions before planting, which can essentially prevent the hollowness of lettuce.

2. Improper management of fertilizer and water.

During the growth period of lettuce, if fertilizer and water are not managed properly and the supply of fertilizer and water is uneven, then it is very easy to crack the stem of lettuce and the hollow phenomenon is more serious. Especially in the mature stage of lettuce, the outer skin gradually sows. If the lettuce is overwatered at this time, the succulent stem of lettuce will absorb water and swell, but the Lignification skin can not expand with it, and there will be voids and cracks. In addition, the lack of boron during the growth of lettuce will lead to the decrease of vitamin C content, disease resistance and stress resistance of lettuce, resulting in hollow phenomenon.

Prevention and control measures: in the growing period to strengthen fertilizer and water management, when the stem begins to expand, it is necessary to combine watering for fertilization, after watering, the stem expansion speed is accelerated, and the demand for fertilizer and water is large, so we should pay attention to the amount of water and should not flood irrigation. after watering, it is necessary to plough in time to increase soil permeability so as to avoid soil consolidation. It is recommended to spray 1-2 times boron fertilizer during the expansion of fleshy stem, which can prevent lettuce from cracking stem and hollow phenomenon.

3. The harvest is too long

After maturing, lettuce should be harvested at the right time. If it is harvested too late, the fleshy stem of lettuce is very prone to hollow phenomenon, which seriously affects the commodity and edible value.

Preventive measures: therefore, lettuce should be harvested and listed in time after ripening, so as to avoid unnecessary economic losses caused by late harvest.

The above is the introduction of lettuce hollow causes and control measures, hope to help you, want to know more related knowledge, please pay attention to us.