Effects of a Nonsteroidal Ecdysteroid Agonist on Survival and Development of the Diamondback Moth, Plutella xylostella

Roger F. Hou; Ling Lan Cheng; Chien Chung Chen; 侯豐男; 鄭玲蘭; 陳健忠; Roger F. Hou;Ling Lan Cheng;Chien Chung Chen; 侯豐男;鄭玲蘭;陳健忠

Effects of a Nonsteroidal Ecdysteroid Agonist on Survival and Development of the Diamondback Moth, Plutella xylostella

Other Title

非類固醇脫皮素拮抗物對小菜蛾存活及發育之影響

Journal

植物保護學會會刊

Journal Volume

40

Journal Issue

1

Pages

49-61

Date Issued

1997-11

Date

1997-11

Author(s)

Roger F. Hou

Ling Lan Cheng

Chien Chung Chen

侯豐男

鄭玲蘭

陳健忠

URI

https://scholars.tari.gov.tw/handle/123456789/5878

https://tpl.ncl.edu.tw/NclService/JournalContentDetail?SysId=A98007352

Abstract

Effects of a nonsteroidal ecdysteroid agonist, viz., tebufenozide (RH5992), on survival and development of the diamondback moth, Plutella xylostella, were investigated by feeding larvae on treated kale leaves. This compound was effective to cause larval mortality only when treating various instars with concentrations over 400 ppm. Although almost 100% cumulative mortality was obtained by treating 1st through 3rd instars with 400 ppm, the 4th instar was slightly lowered down to 87.5% with 400 ppm but maintained 97.5% with 800 ppm. The LC50 values were 96.3, 95.3, 105.8 ppm for 1st, 2nd and 3rd instars, respectively. The LT50 of 4th instar ranged from 3.4 to 1.7 days at 100 to 800 ppm while it ranged from 2.3 to 12.3 days for the other instars. The leaf consumption per larva was lower in treatments with 100 ppm or above than the untreated control. The pupal weight, the percentage of emergence, adult longevity and fecundity were affected when newly hatched larvae were continuously reared on the leaves treated with different concentrations of RH5992. 本試驗以芥藍菜葉片浸潰不同濃度的tebufeoozid。（RH5992，一種非類固醇類脫皮素拮抗物）餵食小菜蛾幼蟲，以探討此化合物對不同齡期幼蟲的影響。試驗結果顯示，當處理濃度高於400ppm，可引起各齡期幼蟲死亡。第l至第3齡幼蟲以400ppm藥劑處理之葉片連續餵食，其最終累積死亡率達100%，但同樣濃度連續餵食4齡幼蟲，其累積死亡率為87.5%，提高濃度至800ppm累積死亡率可達97.5％。RH5992對小菜蛾1、2和3齡幼蟲的半數致死濃度(LC50)分別為96.3、95.3和105.8ppm。當濃度為100至800ppm時，其對小菜蛾4齡幼蟲之半數致死時間(LT50)介於1.7-3.4天，而對其它齡期之幼蟲，則為2.3-12.3天，葉片經濃度100ppm或更高之劑量處理供幼蟲取食，會降低其取食量。初孵化之幼蟲即以RH5992處理之葉片連續餵食，發育完成後之蛹重、羽化率、成蟲壽命和生殖力都會受影響。

Subjects

Plutelia xyiostella

nonsteroidal ecdysteroid agonist

tebufenozide

小菜蛾

非類固醇類脫皮素拮抗物

tebufenozide

Publisher

植物保護學會

Type

journal article

File(s)

Name

40-1-49-61.pdf

Size

696.94 KB

Format

Adobe PDF

Checksum

(MD5):608bce82543c1a2b7399506cd6f73832