Long drought in case of rain to prevent cotton "flower leaf"

After the delayed harvest of summer crops this year, the growth period of cotton in Haimen District was postponed, and the continuous drought after cotton transplanting resulted in serious growth inhibition. The drought in the recent period has been lifted and cotton is returning to life under a suitable water supply. However, in field investigations recently, we found that fresh leaves of cotton and other crops had spotted spots, and farmers called them “flower mosaic” symptoms.

According to the analysis, this is due to the small amount of crop growth under drought conditions, and the rapid growth of the crop after the drought is eliminated. At this time, the original nutrients in the crop are diluted and some of the elements related to the formation of chlorophyll are not sufficiently concentrated. Some trace elements are lower in concentration and the chlorophyll formation rate becomes slower, forming a "flower mosaic" in appearance. If nutrients are not continuously supplied, the photosynthesis of crops will be greatly affected.

After a long drought, foliar spray fertilizer should be used in a timely manner to supplement nutrition, especially trace elements, which is an effective measure to reduce losses. The dosage and concentration should be determined according to the foliar fertilizer product specification, so as to spray through the crop leaves. If the symptoms of "flower mosaic" are not obvious, they may be sprayed once again in 7-10 days. It should be sprayed after 4 pm to facilitate the absorption of crop leaves.

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