Prevent and control three major pests of nursery stock in time

Euonymus japonicus, Cyperus bungeanus, and Hymenoptera are the main pests of the current seedlings. Due to the early occurrence and large amount of occurrence of the first generation of the year, the three pests have different levels of prevention and control, and the number of residual insects is relatively large. At present, the first generation of adults has emerged and the peak of the moth appears. It is expected that the second generation will focus on Seriously endanger the flowers and nursery stocks. Please check the work in various places in time.

First, the trend:

1. Euonymus japonicus, also known as silk wood Venus feet. The larvae are black and have white vertical stripes with white horizontal stripes at the front and back ends. The major hazards are Euonymus japonicus, Euonymus spp., Eucalyptus spp., Silk cottonwood, Poria, Populus, willow and so on. According to observations at the district station, the first generation of Euonymus japonicus had a large amount of occurrence, a long period of occurrence, and a chaotic state. The second generation of Euonymus japonicus entered larvae during the period before and after July 30th.

2. Boxwood wilderness. Larvae head dark brown, green body thick, dark green body back, dark brown, yellow-green vertical lines, mainly endangered melon seeds boxwood, Buxus chinensis, lobular boxwood. The larvae feed on leaves. The second generation of larvae will enter the peak period at the end of July.

3. Thorn moth. There are many species, the main species in our area are yellow thorn moth, green thorn moth, brown thorn moth and so on. The larvae have thorny and poisonous hair on their body surface, commonly known as "spicy hair." It can harm peaches, plums, apricots, plums, pomegranates, jellyfish, red leaf plums, poplars, willows, tea, camellia, black peony, phoenix, maple, populus, eucalyptus, metasequoia, and other seedlings. This year's first generation larvae occur in large quantities. Early onset, the second-generation larvae entered the peak period on July 25, and the larval period will continue until early August.

Second, prevention and control opinions:

1. Prevention and treatment time: the time of the first time from July 30th to August 5th for the large-leaved Cyclovakia ulmoides and Cyclovirobufo gargarizans. The second time of prevention and treatment of the moth is August 10-15.

2. Control pesticides: 40% poisoned silk (48% of Bassin) 800 times or 35% of insecticide net 800 times or 20% of Greenford 800 times or 25% of fast kill Ling II 1000x spray. Missing the appropriate control period led to over-infestation with 40% Poison 600 times spray.

Third, note:

1 Spray time is appropriate for morning and evening.

2 spraying should master the larvae of young larvae.

3 poison dead Wei sensitive to rose, willow, use with caution

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