Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae)
Trichogrammabrassicae Bezdenkois an important egg parasitoid of several lepidopteran insect pests. The parasitism potencial of this parasitoid is affected by insecticides applications. In this study, lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos...
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Entomological Society of Iran
2019-08-01
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| Series: | نامه انجمن حشرهشناسی ایران |
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| Online Access: | https://jesi.areeo.ac.ir/article_120172_0b44cab95772c0cea73036fc178c7ac2.pdf |
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| author | M. Saber S. Vojoudi E. Parsaeyan Akram Ahmadi |
| author_facet | M. Saber S. Vojoudi E. Parsaeyan Akram Ahmadi |
| author_sort | M. Saber |
| collection | DOAJ |
| description | Trichogrammabrassicae Bezdenkois an important egg parasitoid of several lepidopteran insect pests. The parasitism potencial of this parasitoid is affected by insecticides applications. In this study, lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos were evaluated on different life stages and biological parameters of the insect. Bioassays were carried out by residual contact method on adult stage of the parasitoid at 26±1 , 70±5% RH and a photoperiod of 16: 8 (L: D) h. The LC50 values of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos were 753, 1190, 1731.6, 5.85 and 1.96 mg a.i./L on adult T. brassicae, respectively. The results of bioassays on adult stage showed that chlorpyrifos had the highest toxicity compared to the other tested pesticides. Field recommended rate of the pesticides excluding chlorpyrifos showed lower adverse effects on immature stages of the parasitoid. According to IOBC standards, propargite, benomyl, haloxyfop etotyl and imidacloprid were classified as harmless and chlorpyrifos as slightly harmful at immature stages. The sublethal effect studies revealed that LC30 of chlorpyrifos and propargite negatively affected the fecundity and fertility of the females; but the other pesticides did not. Intrinsic rate of increase (rm) values for propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos were 0.344, 0.322, 0.338, 0.337, 0.334 and 0.318 (female offspring/female/day), respectively. Results showed that almost all pesticides excluding chlorpyrifos had less adverse effects on the parasitoid. Therefore, propargite, benomyl, haloxyfop etotyl and imidacloprid can be choose for further evaluation including semifield and field studies. Whether getting suitable results in field studies they would be used in combination with T. brassicae as biological control agent in integrated pest management (IPM) programs. |
| first_indexed | 2024-04-11T04:09:51Z |
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| id | doaj.art-a48d359ff06b4e14b2746f87cfef8e5d |
| institution | Directory Open Access Journal |
| issn | 0259-9996 2783-3968 |
| language | English |
| last_indexed | 2024-04-11T04:09:51Z |
| publishDate | 2019-08-01 |
| publisher | Entomological Society of Iran |
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| spelling | doaj.art-a48d359ff06b4e14b2746f87cfef8e5d2023-01-01T10:06:25ZengEntomological Society of Iranنامه انجمن حشرهشناسی ایران0259-99962783-39682019-08-0139211112410.22117/jesi.2019.120227.1180120172Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae)M. Saber0S. Vojoudi1E. Parsaeyan2Akram Ahmadi3Department of Plant Protection, Faculty of Agriculture, University of Tabriz, TabrizAgricultural Service Center of KhodaAfarin, East Azarbaijan, IranDepartment of Plant Protection, University of TabrizDepartment of Plant Protection, Faculty of Agriculture, University of Tabriz, TabrizTrichogrammabrassicae Bezdenkois an important egg parasitoid of several lepidopteran insect pests. The parasitism potencial of this parasitoid is affected by insecticides applications. In this study, lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos were evaluated on different life stages and biological parameters of the insect. Bioassays were carried out by residual contact method on adult stage of the parasitoid at 26±1 , 70±5% RH and a photoperiod of 16: 8 (L: D) h. The LC50 values of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos were 753, 1190, 1731.6, 5.85 and 1.96 mg a.i./L on adult T. brassicae, respectively. The results of bioassays on adult stage showed that chlorpyrifos had the highest toxicity compared to the other tested pesticides. Field recommended rate of the pesticides excluding chlorpyrifos showed lower adverse effects on immature stages of the parasitoid. According to IOBC standards, propargite, benomyl, haloxyfop etotyl and imidacloprid were classified as harmless and chlorpyrifos as slightly harmful at immature stages. The sublethal effect studies revealed that LC30 of chlorpyrifos and propargite negatively affected the fecundity and fertility of the females; but the other pesticides did not. Intrinsic rate of increase (rm) values for propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos were 0.344, 0.322, 0.338, 0.337, 0.334 and 0.318 (female offspring/female/day), respectively. Results showed that almost all pesticides excluding chlorpyrifos had less adverse effects on the parasitoid. Therefore, propargite, benomyl, haloxyfop etotyl and imidacloprid can be choose for further evaluation including semifield and field studies. Whether getting suitable results in field studies they would be used in combination with T. brassicae as biological control agent in integrated pest management (IPM) programs.https://jesi.areeo.ac.ir/article_120172_0b44cab95772c0cea73036fc178c7ac2.pdfbiological controlegg parasitoidintegrated pest managementlethal effectslife table |
| spellingShingle | M. Saber S. Vojoudi E. Parsaeyan Akram Ahmadi Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae) نامه انجمن حشرهشناسی ایران biological control egg parasitoid integrated pest management lethal effects life table |
| title | Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae) |
| title_full | Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae) |
| title_fullStr | Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae) |
| title_full_unstemmed | Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae) |
| title_short | Lethal and sublethal effects of propargite, benomyl, haloxyfop etotyl, imidacloprid and chlorpyrifos on life table parameters of egg parasitoid, Trichogramma brassicae (Hym.; Trichogrammatidae) |
| title_sort | lethal and sublethal effects of propargite benomyl haloxyfop etotyl imidacloprid and chlorpyrifos on life table parameters of egg parasitoid trichogramma brassicae hym trichogrammatidae |
| topic | biological control egg parasitoid integrated pest management lethal effects life table |
| url | https://jesi.areeo.ac.ir/article_120172_0b44cab95772c0cea73036fc178c7ac2.pdf |
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