In recent years, some persimmon gardens are still seriously afflicted by persimmon warts. The main reason is that the prevention and treatment time is not correct. First, we must seize the prevention and control during the flood season, and second, we must seize the prevention and control of the first generation of eggs hatching. Afterwards, the effect of control is not good. Occurrence In the Pinggu area, there are four generations a year. The early nymphs live in the main trunk, perennial branches, and cracks in the rough skin, and a few in the branches, buds, and persimmons. Overwintering nymphs in the beginning of each year on April 17 -21, the average temperature in the 12 °C -14 °C, the peak period in the first half of May, after the larvae damage the new shoots, 5-7 days body Start waxing. The nymphs differentiated males and females through dehiscence and formed white oocysts on the backs of female adults after mating, and spawned one after another. The first generation eggs hatched on June 5th-16th, and the newly hatched nymphs crawled out of the shell along with hatching, and the animals were waxed for 3 or 5 days and then fixed. The first generation mainly damaged new shoots and leaves. Young fruit. The second generation of eggs hatched in the period of July 16 -25, the second generation of key damage persimmon fruit, part of the nymphs in the junction of persimmon fruit and Shidi damage. The third generation of eggs hatched on August 18-27, the third generation of nymphs was the heaviest damage, causing persimmon fruit to become red and soft in early fall off, and there were also fallen leaves caused by the damage caused by early shoots. The fourth generation of eggs hatched in the period from September 27 to October 8, after the hatching of nymphs into overwintering places. Comprehensive prevention measures 1. In the early spring, scrape and destroy large branches, old cracks, cut worms and shikidi, eliminate some winter nymphs. 2. Pay attention to the protection of natural enemies. Do not use chemical pesticides when the amount of ladybugs is large. 3. Through tests, 1-2 laps of every 50-60 centimeters in the main branch of the main branch in early September will induce most nymphs that live in winter and be destroyed in winter. 4. Chemical control, the key to scraping the old cracked skin on the basis of close to the germination before playing a 3-5 Baume degree lime sulfur, or 29% of the lime sulfur mixture water 200 times, or 45% crystal lime sulfur agent 20 -30 times the liquid can basically control the damage of the whole year; the second prevention and control critical period in the overwintering period of the nymphs emerges, use 5% to kill the bead or 40% comet 1000 times. After the second generation of nymphs control later, it basically can not control the damage. Brand computer chips, dual-frequency integrated circuits, cross-magnetic induction detection, bringing higher accuracy, reliability and stability. 2. Automatic control system, using special magnetic materials and unique technology, the detection accuracy of the probe is particularly high, and the accurate position of the broken needle is displayed in 8 detection areas. 3. Dual probe design, double detection function, higher safety performance, compared with other types of needle detectors, at the same detection height, the sensitivity is increased by 10%. 4. Automatic detection, automatic induction, automatic stop when no detection is needed, 0-10 sensitivity adjustment, when there is a broken needle, the conveyor belt automatically stops and returns backwards. 5. With a counting function, it can count the number of qualified or unqualified products. 6. It has two alarm modes: sound effect and light alarm. 7. Luxurious appearance, novel style, time-saving and power-saving, simple operation Rapid PCR detection,Rapid Detection Rapid Detection PCR Kit Viral Antigen Detection Jiangsu iiLO Biotechnology Co., Ltd. , https://www.sjiilobiotech.com
Persimmon Park Comprehensive Prevention and Treatment