Method for preventing and treating calathea rotundifolia cv.fasciata leaf spot

Abstract

The invention relates to a method for preventing and treating calathea rotundifolia cv.fasciata leaf spot, which is characterized in that turfy soil Klasmann No. 414 is used as a culture substrate; the temperature is controlled at 22-28 DEG C in the day and 20-25 DEG C in the night, and the humidity is controlled at 75-85 percent in the day and 80-95 percent in the night; solution prepared by dissolving 0.2-0.4 gram of urea, 0.2-0.4 gram of monopotassium phosphate and 0.1-0.2 gram of micronasole into 100 L of water is sprayed at the time before sunlight irradiates plants in the morning once a month from plantlet introduction to sale; when an EC (earth current) value of soil is more than 0.12, clear water is sprayed, and when the EC value of the soil is less than 0.25, 1-1.2 g/L of a water solution containing peters professional 20-20-20 or 0.8-0.9 g/L of a KNO3 water solution is sprayed alternatively, wherein the peters professional 20-20-20 comprises the following components in percentage by weight: 20% of total nitrogen, 8.04% of ammonium nitrogen, 11.96% of nitrate nitrogen, 0.02% of boron, 0.01% of chelate copper, 0.10% of chelate iron, 20% of water-soluble phosphoric anhydride, 0.056% of chelate manganese, 20% of water-soluble potassium oxide, 0.01% of molybdenum, 0.25% of water-soluble magnesium oxide, 0.0162% of chelate zinc, and the balance of water.

Description

technical field [0001] The invention belongs to the technical field of plant cultivation, in particular to the technical field of green apple arrowroot cultivation. Background technique [0002] Green apple arrowroot is native to Brazil and other countries in tropical America. It was selected and cultivated by Europeans (Belgium, Netherlands) from the original species of arrowroot. Sexually prefers a semi-shady environment with high temperature and humidity, is afraid of cold, and avoids strong light. The leaves grow during the day and close at night. The suitable temperature for growth is 18°C ​​to 30°C, and the relative humidity of the air is required to be high, and the potting soil and environment should not be dry. The leaf shape is round, the leaf quality is plump, and the leaf color is green. There are neat stripes on it, which has high ornamental value and is especially popular. In addition, it prefers shade, so it is suitable for potted plants indoors for a long t...

AI Technical Summary

Problems solved by technology

[0003] Since the green apple arrowroot is a new variety introduced from abroad, a small amount of it can be seen in the few flower wholesale markets in China. It has just been introduced in my country, and there is little research in the field of cultivation technology. Therefore, the quality of flowers in our country is still low. There are certain defects. For example, the finished flowers on the market often have large areas of yellowish-brown spots on the leaves, which is the so-called leaf spot disease. This situation seriously affects the quality of green apple arrowroot. , reducing its economic value