ICAR Research Data Repository for Knowledge Management
<p><span style="font-family: "times new roman", times; font-size: medium;">Bio-efficacy of egg parasitoid, Trichogramma chilonis (Ishii) against spotted stem<br />borer, Chilo partellus (Swinhoe) in Kharif maize</span></p>
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dc |
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| Title Statement |
<p><span style="font-family: "times new roman", times; font-size: medium;">Bio-efficacy of egg parasitoid, Trichogramma chilonis (Ishii) against spotted stem<br />borer, Chilo partellus (Swinhoe) in Kharif maize</span></p> |
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SINGH, GAURAV ; Ph.D. Researcher, Hawkesbury Institute for the Environment, Western Sydney University Jaglan, M S; cCCS Haryana Agricultural University, Regional Research Station, Karnal, India, 132001 Verma, T ; Agricultural Technology Information Centre, CCS Haryana Agricultural University, Hisar, India, 125004 Department of Entomology, CCS Haryana Agricultural University and CCS Haryana Agricultural University Regional Research Station, Uchani, Karnal |
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Chilo partellus; Trichogramma chilonis; parasitization; biological control; net economic return |
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| Summary, etc. |
<span style="font-family: "times new roman", times; font-size: small;"><span lang="EN-US">Maize stem borer, <em>Chilo partellus, </em>is the most serious and ubiquitous pest of maize not only in India but also throughout the Asian countries where it is a constant threat. The larvae, after hatching, enter the plant whorl and feed inside the plant for rest of the life. Owing to its cryptic behavior, insecticides are not the right choice. Moreover, </span><span lang="EN-US">unwarranted use of pesticides has directly increased the cost of cultivation and accounted for many health as well as environmental hazards. Use of biological control agents is far better than harmful agro-chemicals in terms of health benefits and ecosystem stability, provided they are effective enough to suppress the pest population. Egg parasitoid, <em>Trichogramma chilonis</em>, has proven its worth against many lepidopteran borers and provided satisfactory control in many crops. With this view, </span>an experiment was conducted to evaluate the potency of <em>T. chilonis </em>against spotted stem borer, <em>Chilo partellus </em>at laboratory and research area of CCS Haryana Agricultural University, Regional Research Station, Karnal during <em>Kharif</em>, 2017. <span lang="EN-US">In our study, maximum egg parasitization (62.40%) was recorded in treatment with </span>two releases of <em><span lang="EN-US">T. chilonis</span></em><span lang="EN-US"> parasitized eggs @ 1,25,000/ha at 7 and 14 days after germination (DAG) which was at par with </span>two releases of <em><span lang="EN-US">T. chilonis</span></em><span lang="EN-US"> parasitized eggs @ 1,00,000/ha at 7 and 14 DAG (60%) whereas treatment with one spray of Dimethoate 30 EC @ 660 ml/ha had minimal <em>T. chilonis </em>activity (3.5% parasitization). Lower leaf injury rating (LIR), plant infestation and dead hearts were recorded in treatments with two release of <em>T. chilonis </em>parasitized @ 1,25,000 and 1,00,000 eggs/ha at 7 and 14 DAG which were statistically comparable with Dimethoate 30 EC treated plots. Whereas treatments with single release of <em>T. chilonis </em>parasitized eggs did not provide satisfactory control. </span>Treatment with two releases of <em><span lang="EN-US">T. chilonis</span></em><span lang="EN-US"> parasitized eggs @ 1,00,000/ha at 7 and 14 DAG</span> was the most economically remunerative with the highest incremental cost: benefit ratio (1:32.48) and benefit: cost ratio (1.41). Although, pesticide treated plots (Dimethoate 30 EC @ 660 ml/ha at 7 DAG) provided satisfactory monetary return but it is not environmentally compatible and ecologically viable for long run.</span> |
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| Publication, Distribution, Etc. |
Indian Journal of Traditional Knowledge (IJTK) 2020-12-30 12:30:42 |
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| Electronic Location and Access |
application/pdf http://op.niscair.res.in/index.php/IJTK/article/view/25569 |
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| Data Source Entry |
Indian Journal of Traditional Knowledge (IJTK); ##issue.vol## 19, ##issue.no## 4 (2020): Indian Journal of Traditional Knowledge |
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| Language Note |
en |
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| Nonspecific Relationship Entry |
http://op.niscair.res.in/index.php/IJTK/article/download/25569/465531879 http://op.niscair.res.in/index.php/IJTK/article/download/25569/465531880 http://op.niscair.res.in/index.php/IJTK/article/download/25569/465531881 http://op.niscair.res.in/index.php/IJTK/article/download/25569/465531882 |
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