"painting" on corn leaves
First, the leaves appear yellow stripes may be soil zinc deficiency
Zinc deficiency in the soil, yellowing streak in the leaves of maize seedlings, and yellowing disease in the late stage. It is suggested that the farmer spray foliar zinc sulfate or zinc oxide, and the organic fertilizer can also be used to activate the soil and supplement the missing zinc in the soil.
Second, the purple leaves may be soil phosphorus deficiency or drug stress
Phosphorous deficiency in the soil often appears as purple in the old leaves, and the leaves are brownish in color when severe. Potassium dihydrogen phosphate and other quick-acting foliar fertilizers can be sprayed. It is also recommended that farmers use high-nitrogen and high-phosphorus compound fertilizers as basal fertilizers next year.
Purple corn leaves, in addition to the above mentioned reasons for the lack of phosphorus in the soil, the phytotoxicity, strain characteristics, soil compaction, low temperature, etc. may be incentives, of which the most common phytotoxicity. Most of the symptoms of phosphorus deficiency in maize seedlings can be basically improved with the growth of plants and the roots are tied down. However, some herbicides such as chrysogenin may cause serious purple bloom when misused. For these conditions, brassin + potassium dihydrogen phosphate + a small amount of urea spray can be used to speed up the recovery of the plant.
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