{"title":"Efficiency of the mixed biocide GCSC-BtA against vegetable pests of different arthropod orders in the south-eastern China†","authors":"C. Sengonca, B. Liu, Y. J. Zhu","doi":"10.1111/j.1493-0280.2001.01012.x","DOIUrl":null,"url":null,"abstract":"<p>The present paper deals with the efficiency of the mixed biocide GCSC-BtA against vegetable pests of five orders of arthropod insects in the south-eastern China, i. e., diamondback moth, <i>Plutella xylostella</i> (L.); green peach aphid, <i>Myzus persicae</i> (Sulzer); yellow-fanded flea beetle, <i>Phyllotreta vittata</i> Fabricius; vegetable leaf miner, <i>Phytomyza nigricornis</i> Macquart; and vegetable spider mite, <i>Tetranychus neocaledonicus</i> Andre. The results show that the mixed biocide GCSC-BtA has a higher efficacy of control against all of the five pests than the commercial biocide <i>B.t.</i> and insecticide Diazinon. GCSC-BtA gave a higher mortality value of 92.18 % against <i>P. xylostella</i> as compared to the biocide <i>B.t.</i> with a value of 64.70 % and Diazinon with a value of 50.00 %. Similar mortalities were obtained with the other four pests regarding the efficacy of the three products tested against them.</p><p>The concentration-mortality regression equations were calculated by the probit analysis, from which the average mortalities were calculated. The values calculated for GCSC-BtA were 81.13 % for <i>P. xylostella</i>, 75 % for <i>M. persicae</i> and <i>T. neocaledonicus</i>, 69.23 % for <i>P. vittata</i>, and 61.03 % for <i>P. nigricornis</i> as compared to those caused by Diazinon: 33.33 %, 27.42 %, 66.31 %, 44.54 %, 19.65 % for <i>P. xylostella, M. persicae, P. vittata, P. nigricornis</i>, and <i>T. neocaledonicus, </i> respectively. Based on LC<sub>50</sub>, <i>P. xylostella</i> was most susceptible to GCSC-BtA with a LC<sub>50</sub> value of 0.3445, followed by <i>B.t.</i> with a value of 0.8404 and Diazinon with a value of 1.3160. The LC<sub>50</sub> value of GCSC-BtA for <i>M. persicae</i> was 0.4660 which was about three times less than that of Diazinon. LC<sub>50</sub> value of GCSC-BtA for <i>P. vittata</i> was 0.3954 which was about the same as that of Diazinon. <i>P. nigricornis</i> and <i>T. neocaledonicus</i> were also much more susceptible to GCSC-BtA than to <i>B.t.</i> and Diazinon. It is concluded that GCSC-BtA kills more target pests than <i>B.t.</i> and is more effective than Diazinon in controlling the vegetable pests.</p>","PeriodicalId":100103,"journal":{"name":"Anzeiger für Sch?dlingskunde","volume":"74 2","pages":"33-36"},"PeriodicalIF":0.0000,"publicationDate":"2003-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/j.1493-0280.2001.01012.x","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Anzeiger für Sch?dlingskunde","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/j.1493-0280.2001.01012.x","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
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Abstract
The present paper deals with the efficiency of the mixed biocide GCSC-BtA against vegetable pests of five orders of arthropod insects in the south-eastern China, i. e., diamondback moth, Plutella xylostella (L.); green peach aphid, Myzus persicae (Sulzer); yellow-fanded flea beetle, Phyllotreta vittata Fabricius; vegetable leaf miner, Phytomyza nigricornis Macquart; and vegetable spider mite, Tetranychus neocaledonicus Andre. The results show that the mixed biocide GCSC-BtA has a higher efficacy of control against all of the five pests than the commercial biocide B.t. and insecticide Diazinon. GCSC-BtA gave a higher mortality value of 92.18 % against P. xylostella as compared to the biocide B.t. with a value of 64.70 % and Diazinon with a value of 50.00 %. Similar mortalities were obtained with the other four pests regarding the efficacy of the three products tested against them.
The concentration-mortality regression equations were calculated by the probit analysis, from which the average mortalities were calculated. The values calculated for GCSC-BtA were 81.13 % for P. xylostella, 75 % for M. persicae and T. neocaledonicus, 69.23 % for P. vittata, and 61.03 % for P. nigricornis as compared to those caused by Diazinon: 33.33 %, 27.42 %, 66.31 %, 44.54 %, 19.65 % for P. xylostella, M. persicae, P. vittata, P. nigricornis, and T. neocaledonicus, respectively. Based on LC50, P. xylostella was most susceptible to GCSC-BtA with a LC50 value of 0.3445, followed by B.t. with a value of 0.8404 and Diazinon with a value of 1.3160. The LC50 value of GCSC-BtA for M. persicae was 0.4660 which was about three times less than that of Diazinon. LC50 value of GCSC-BtA for P. vittata was 0.3954 which was about the same as that of Diazinon. P. nigricornis and T. neocaledonicus were also much more susceptible to GCSC-BtA than to B.t. and Diazinon. It is concluded that GCSC-BtA kills more target pests than B.t. and is more effective than Diazinon in controlling the vegetable pests.
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