Tomato leaves should follow several principles: 1. The first bottom of a panicle grows completely red before it begins to turn red, the upper leaves cannot be destroyed, so as not to affect the leaves to produce nutrient-supplying fruits. 2. The color is dark green, and there are no pests or leaves with no macula that cannot be destroyed because these leaves can still contribute to the yield of tomatoes. 3. The leaf color at the bottom of the ear of a panicle becomes yellow, and old leaves with serious macular or disease damage may be destroyed. 4. The middle and lower part of the plant can be destroyed because of serious yellowing and aging of the leaves caused by serious diseases or other physiological diseases.
When the leaves are beaten, it is advisable to use two slices at a time, not too much; the interval between two leaves is suitable for more than 10 days; each time the leaves are to be beaten at about 12 o'clock on a sunny day, and the dew can not be played in the morning. Leaf, in order to avoid the incidence of wound infection, can not fight the leaves in the evening, so as not to heal wounds, and in the humidity at night when the disease; after the leaves should be sprayed natural alizarin - Shuofeng 481, to promote the photosynthesis of the leaves, Avoid affecting plant growth and development.
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