Occurrence and Control of Diamondback Moth

Occurrence and Control of Diamondback Moth

I. Occurrence: According to the Zhongyao monitoring and reporting point on April 20th, 25 cabbages were surveyed with an average insect population of 0.68, and the average egg quantity per plant was 0.12, among which the low-order larvae accounted for 73.3%. On April 24, the average number of insects per plant was 2.4, of which low-order larvae accounted for 66.7%. According to 20W black light trapping observation at the Zhongwei monitoring station, the moth was seen on April 9th, 6 days earlier than in 2006, and the cumulative number of moth traps on April 9-24 was 271, which was 16 in the same period of 2006. 12.9 times is 4.5 times the 60 of the same period in 2005, 6.2 times the 44 of the same period in 2004, and is 6.8 times the average of 40 years. The peaks appear on April 12-14 and April 21-23 respectively. On the day, the number of moths was 22 and 207 respectively, accounting for 8.1% and 76.4%, respectively. Second, the trend: due to warm winter this year, the more winter insects insect source, the base is relatively high, especially since April, has been mainly sunny, less rainfall, the diamondback moth in the early spring growth and reproduction is more favorable, adults Holding more eggs. Occurrence: Greatly happening. Third, prevention and control advice: 1, control objects: cabbage, vegetables, radishes and other cruciferous vegetables. 2, control of the appropriate period: the first prevention from April 28 to May 2, the second time around May 10, after the field pest control as the case. 3, prevention and control technology: spray to be even and thoughtful 4, control agents: 15% hit SC or 24% Leitong SC2000-3000 times, 0.5% green card ME1500-2000 times, 2.2% of Haizheng three orders ME3000 times, 2.5% dish like SC1000- 1500 times, 10% Divide TS1500-2000 times, 5% Ruijinte EC1500-2000 times or 1.5% cloud EC1500-3000 times spray. It is forbidden to use highly toxic and high-residue pesticides on vegetables, promote the use of high-efficiency, low-toxic, low-residue pesticides and actively use recommended pesticides. Use pesticides alternately.

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