Since the end of July, the duration of 35°C~36°C has been more than ten days. The highest place has reached 37°C, and the local area has reached 38°C. Because there is no rainfall, many soils in the cotton fields are cracked and the top of the cotton seedlings is wilting at around noon. In recent days, moderate to heavy rain has occurred in most parts of our province, and cotton has been washed by heavy rain during this heavy rain. Some cotton seedlings in the cotton fields may have stem blight disease. A few of the cotton seedlings are quickly wilting, and those that are seriously become pieces of cotton seedlings. Sharply wilting.
The stem blight of cotton leaves mostly begins from the main stem growth point or fruit branch, generally from the top down, from the outside to the inside development, the tip of the leaf, the leaf edge is first chlorotic, the veins remain green, the veins between leaves are pale yellow, Gradually turned red, the leaves rolled and then died. Petiole loses water and leaves gradually fall off. The main stem blighted but the anatomic catheter was colorless. The roots are thick and short, and the fibrous roots are less stunted.
The incidence of stem blight disease in cotton red leaves has several reasons. One is extensive farming in cotton fields, and the incidence of cotton root dysplasia is heavy; the second is poor incidence of cotton fields with poor drainage; third, partial application of nitrogen fertilizer, strong growth of cotton, and large incidence of cotton field shading Heavy; Fourth, less organic fertilizer, poor land fertility. It is not difficult to see that when the climate changes abruptly, some cotton plants with poor cultivation environment and incomplete development of physiological functions are prone to stem blight disease.
In the prevention and treatment of stem blight of cotton leaves, the following points should be mainly grasped.
First, control and promote the ability to resist stress. First, for the growing cotton, the use of plant growth retardants shrinking control or boosting the control of prosperous, with 2 to 3 grams per mu, or 8 to 12 milliliters of helper prime, individual near the wild growth of cotton, After the topping, the dosage of Anchuang Zhuang Zhuangsu per acre can be added to 4~5g or 16~20ml, and sprayed with 50kg of water, which can effectively balance the nutrient balance of the cotton plant and promote its steady growth. The second is the soil compaction of cotton fields, to timely cultivator break ventilation, enhance permeability performance; Third, the cotton fields on the lower ground, we must always pay attention to grooming ditch, to promote the roots under the cotton bar; Fourth, the implementation of double membrane In the cultivated cotton fields, it is necessary to quickly remove the mulch and develop the cotton roots in depth.
Second, increase potassium fertilizer, improve fertilizer efficiency. The lack of potassium is one of the leading factors inducing the stem blight of cotton leaves. For the two types of cotton fields with potential shortage of potassium or less potassium, the application of potassium fertilizer should be 10~15 kg per mu, which can meet the needs of cotton for potassium fertilizer. Second, the structure of fertilizer can be adjusted to improve the utilization of nitrogen fertilizer and phosphate fertilizer.
Third, spray fertilizers outside the roots to improve the environment for oxygen supply and fertilizer. For cotton that has been infected with red leaf blight, as long as the cotton leaves have not withered, the main stem growth point remains fresh, and the extra-root fertilizer can be used to quickly restore the reproductive function. One is to use 100 ml of Huiminfeng or Zhuangfuxing with humic acid active liquid fertilizer and 50 kg of water for spraying, which will not only provide quick fertilizer but also improve soil oxygen supply status; second, it can spray 0.01% Tianfengsu or The preservation solution can promote its rapid growth; the third is the application of the plant growth promoter “802†4000-6000 times solution, which can accelerate cell division and enhance cotton self-regulation.
JRT usb interface distance sensor board adds a USB port to a Laser Distance Sensor, inexpensive laser distance measurement sensors, allowing customers directly using GBeacon-2.3-Fx.exe software to control the rangefinder sensor. Usb laser distance sensors are the the most popular model devices, it works by measuring the phase of an visible-red laser beam that reflects on the target. Usually, customers would like to choose CH341SER.EXE version to test.
USB Laser Distance Sensor,Distance Sensor,Laser Distance Sensor,Distance Measurement Sensors
Chengdu JRT Meter Technology Co., Ltd , https://www.cdlaserdistancemeter.com