Hyphantria cunea, also known as Hyphantria cunea, belongs to the genus Hyphantria, a typical polyphagous pest and a worldwide quarantine pest. It has a strong reproductive capacity, a large number of hosts, a wide range of transmission routes and great outbreak harm. In 2003, it was listed as the first alien invasive species in China.
On March 25th, 285 monitoring points of Hyphantria cunea were set up in the whole city, and the adult monitoring of Hyphantria cunea was started in an all-round way. The investigation was conducted every two days and the report was made once. On April 20th, the Weekly Survey of Eggs and Larvae of Hyphantria cunea was launched. On April 27, the report of monitoring and investigation day of American white moth was fully implemented; On May 3rd, Hyphantria cunea has entered the late stage of adult emergence and the early stage of egg incubation. Up to now, the trapping amount of Hyphantria cunea adults in the city has increased significantly compared with the same period of last year, and the prevention and control situation is very serious.
Adult monitoring situation
By May 3rd, the city had attracted 13426 comprehensive worms, an increase of 12026 over last year. On March 26th, the first adult was detected in Liangshan County, four days earlier than last year. The peak of adult emergence was from April 20th to 28th, 8- 10 days earlier than last year.
Egg monitoring situation
On April 15, the egg mass was first discovered in Liangshan County. On April 25th, eggs were found in Zoucheng, Yutai and Jiaxiang counties. Since April 26th, eggs have been found in surabaya county, Wenshang County, rencheng district, Yanzhou District and Qufu City. As of May 3rd, 124 egg masses have been found in the whole city.
Larval monitoring situation
On April 24th, larvae were found in Liangshan County and Zoucheng City, six days earlier than last year. Since April 27th, larvae have been detected in rencheng district, Yutai County and Yanzhou District. As of May 3rd, 26 larvae were found in the whole city.
Occurrence trend prediction
★ occurrence time prediction
According to the overwintering adult emergence peak of Hyphantria cunea in the city, combined with climatic factors such as temperature and humidity, the time interval method was used to predict that the hatching peak of Hyphantria cunea eggs in the city was May 7-15, which was 5-7 days earlier than last year, that is, May 7 entered the first generation larvae control period of Hyphantria cunea. According to the occurrence regularity of Hyphantria cunea, it is predicted that May 12 -28 is the first generation larva of Hyphantria cunea, which is the best control period.
★ Occurrence area prediction
According to the comprehensive forecast and analysis of counties and cities, the first generation larvae of Hyphantria cunea will occur generally in the city, and some of them will occur moderately.
Predict moderate occurrence area
rencheng district
Changgou, Anju, Nanzhang, Tangkou, Yutun, etc.
Qufu city
Xiaoxue, Lingcheng, Wangzhuang, Shimen Mountain and Fangshan.
Zoucheng city
Yishan, Kanzhuang, Zhangzhuang, Qianquan, Fushan, Gangshan, Shibi and Guoli.
weishan county
Xiazhen, Zhaoyang, Huancheng, Nanyang and Mapo.
Yutai county
Huang Zhang, Wang Lu, Binhu and Gu Ting.
Jiaxiang county
Zhongshan, Jintun, Huanggai and Mengguji.
Shui Bo sub-district office
Boxing store, Xiao Anshan, etc.
hi-tech zone
Xihe, Liuhang, Huangtun and Zhuang Jie.
economic development zone
Tuanli and Maji
Prevention and cure method
1, cut off the net curtain
When the larvae of Hyphantria cunea make a net, obvious net curtains can be seen on the outer edge of the tree. Cut the net curtain together with the twigs with pruning shears or pruning shears. Pay special attention not to break the net when cutting the net curtain, so as to avoid the larvae from leaking out. The cut nets are burned or buried in a centralized way, and the larvae scattered on the ground should be killed immediately. At the same time, spraying drugs around 100 meters can achieve good control effect.
2, spraying prevention and control
Before the 4th instar, 25% diflubenzuron 1500-2500 times, 20% diflubenzuron suspension, 5% mirex suspension 1250-2500 times and 25% avermectin1500-25 times can be selected.
After the 4th instar, 2% avermectin 1000-1500 times, 2% emamectin benzoate 1000-2000 times, 4.5% beta-cypermethrin 2000-4000 times and 2.5% beta-cypermethrin 65438+ can be selected.
Here, I would like to appeal to the masses. If you can manually remove moth larvae, do it by hand, and don't just wait for spraying.
One small step for the whole people, one big step for a civilized city. Please take active actions to prevent and control the American white moth together and protect our home together!
Jining natural resources and planning bureau