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http://dx.doi.org/10.11625/KJOA.2014.22.3.445

Emergence Timing of overwintered adults laid eggs and Control Effect by Eco-friendly materials to Cacopsyllapyricola  

Cho, Young-Sik (농촌진흥청 국립원예특작과학원 배시험장)
Song, Jang-Hoon (농촌진흥청 국립원예특작과학원 배시험장)
Lim, Kyeong-Ho (농촌진흥청 국립원예특작과학원 배시험장)
Choi, Jin-Ho (농촌진흥청 국립원예특작과학원 배시험장)
Lee, Han-Chan (농촌진흥청 국립원예특작과학원 배시험장)
Publication Information
Korean Journal of Organic Agriculture / v.22, no.3, 2014 , pp. 445-455 More about this Journal
Abstract
The pear sucker (Cacopsylla pyricola) is the most important insect pest in Korea. The hatching rates of overwintered adults laid eggs were observed at 10, 13, 18, and $22^{\circ}C$. The liner model was draw as Y=0.00277X+0.00146(Y=developmental rate, X=temperature) about temperature and developmental rate to eggs. The developmental threshold temperature to eggs was assumed about $-0.83^{\circ}C$. The egg hatching timing over 50% as the accumulated temperature by day maximum temperature $6^{\circ}C$ over from 1st February in 2008, 2009 and 2011 was 429.7, 417.6, and 424.3 degree $^{\circ}C$, respectively, was 3 to 7days before full blooming in pear orchard. On the other hand, the abamectin 1.8EC, lime sulfer, machine oil and 13 kinds of eco-friendly materials were not shown the control effect to the eggs. To mixed stage of pear sucker, the eco-friendly materials over 90% control value were 4 kinds such as a mixture of Azadiractin A+B, Nimbin, Salanin, Meliantriol and Vepol after twice application as 21st May and 5th June in pear growing season, in 2012.
Keywords
cacopsylla pyricola; hatching; control effect; developmental threshold temperature;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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