{"title":"两株苏云金芽孢杆菌对果胶蚜幼虫的潜在活性研究","authors":"Gamal Omar, A. Ibrahim, Kh. Hamadah","doi":"10.21608/EAJBSF.2021.182300","DOIUrl":null,"url":null,"abstract":"The current study was conducted to investigate the biological activities of the two strains of Bacillus thuringiensis (Bacillus thuringiensis var. Kurstaki 1(Bt K1) and Bacillus thuringiensis var. Kurstaki 2 (Bt K2)) against the newly hatched (neonate) larvae of the pink bollworm, Pectinophera gossypiella. The two strains exhibited their toxicity against the treated larvae. Also, the lethal effect was extended in the resulted stages, pupae and adults. Based on LC50 for total mortality, Bt K1 was more potent than Bt K2 where LC50 was 2.21x1010 and 3.11x1010, respectively. However, the two strains were revealed a reduction of pupation and adult emergence %. Irrespective of the strain, Bt significantly decreased larval duration and significantly increased pupal duration. No effect was recorded on morphogenesis. In the present study,it was broadly that Bacillus thuringiensis showed its ability in the control of Pectinophora gossypiella.","PeriodicalId":11401,"journal":{"name":"Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control","volume":"52 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2021-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"The Potential Activities of Two Bacillus thuringiensis Strains Against the Neonate Larvae of Pectinophera gossypiella\",\"authors\":\"Gamal Omar, A. Ibrahim, Kh. Hamadah\",\"doi\":\"10.21608/EAJBSF.2021.182300\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The current study was conducted to investigate the biological activities of the two strains of Bacillus thuringiensis (Bacillus thuringiensis var. Kurstaki 1(Bt K1) and Bacillus thuringiensis var. Kurstaki 2 (Bt K2)) against the newly hatched (neonate) larvae of the pink bollworm, Pectinophera gossypiella. The two strains exhibited their toxicity against the treated larvae. Also, the lethal effect was extended in the resulted stages, pupae and adults. Based on LC50 for total mortality, Bt K1 was more potent than Bt K2 where LC50 was 2.21x1010 and 3.11x1010, respectively. However, the two strains were revealed a reduction of pupation and adult emergence %. Irrespective of the strain, Bt significantly decreased larval duration and significantly increased pupal duration. No effect was recorded on morphogenesis. In the present study,it was broadly that Bacillus thuringiensis showed its ability in the control of Pectinophora gossypiella.\",\"PeriodicalId\":11401,\"journal\":{\"name\":\"Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control\",\"volume\":\"52 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2021-07-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.21608/EAJBSF.2021.182300\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21608/EAJBSF.2021.182300","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
本试验研究了苏云金芽孢杆菌(Bacillus thuringiensis var. Kurstaki 1(Bt K1))和苏云金芽孢杆菌(Bacillus thuringiensis var. Kurstaki 2 (Bt K2))两株菌株对粉红棉铃虫Pectinophera gossypiella新孵化幼虫的生物活性。这两种菌株对处理后的幼虫均表现出毒性。毒力在成虫期、蛹期和成虫期均有延长。根据总死亡率LC50, Bt K1比Bt K2更有效，LC50分别为2.21x1010和3.11x1010。但两菌株的化蛹率和成虫羽化率均降低。无论哪种菌株，Bt均显著降低幼虫持续时间，显著增加蛹持续时间。对形态发生无影响。在本研究中，苏云金芽孢杆菌对果胶蚜的控制能力得到了广泛的认可。
The Potential Activities of Two Bacillus thuringiensis Strains Against the Neonate Larvae of Pectinophera gossypiella
The current study was conducted to investigate the biological activities of the two strains of Bacillus thuringiensis (Bacillus thuringiensis var. Kurstaki 1(Bt K1) and Bacillus thuringiensis var. Kurstaki 2 (Bt K2)) against the newly hatched (neonate) larvae of the pink bollworm, Pectinophera gossypiella. The two strains exhibited their toxicity against the treated larvae. Also, the lethal effect was extended in the resulted stages, pupae and adults. Based on LC50 for total mortality, Bt K1 was more potent than Bt K2 where LC50 was 2.21x1010 and 3.11x1010, respectively. However, the two strains were revealed a reduction of pupation and adult emergence %. Irrespective of the strain, Bt significantly decreased larval duration and significantly increased pupal duration. No effect was recorded on morphogenesis. In the present study,it was broadly that Bacillus thuringiensis showed its ability in the control of Pectinophora gossypiella.
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