Field efficacy of biocapsules of entomopathogenic fungi for the management of vegetable pests (Record no. 289672)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 05867nam a22002057a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 632.6 |
| Item number | PAR/FI PG |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Parvathy Maloth |
| 245 ## - TITLE STATEMENT | |
| Title | Field efficacy of biocapsules of entomopathogenic fungi for the management of vegetable pests |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellayani |
| Name of publisher, distributor, etc | Department of Agricultural Entomology, College of Agriculture |
| Date of publication, distribution, etc | 2022 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 64p. |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | M Sc |
| 520 ## - SUMMARY, ETC. | |
| Abstract | The study entitled “Field efficacy of biocapsules of entomopathogenic fungi <br/>for the management of vegetable pests” was conducted at the Biocontrol Laboratory <br/>for Crop Pest Management, Department of Agricultural Entomology, College of <br/>Agriculture, Vellayani, Thiruvananthapuram, during the year 2018-2021. The <br/>objective of the study was to evaluate the efficacy of biocapsules of <br/>Beauveria bassiana (Balsamo) Vuillemin, Metarhizium anisopliae (Metschnikoff) <br/>Sorokin, Lecanicillium lecanii (Zimmermann) Zare and Gams and <br/>Lecanicillium saksenae (Kushwaha) Kurihara and Sukarno for the management of <br/>major groups of vegetable pests. The study also intended to standardize the dose of <br/>biocapsules in managing amaranthus leaf webber Spoladea (Hymenia) recurvalis F., <br/>okra shoot and fruit borer Earias vittella F. and cowpea aphid Aphis craccivora Koch. <br/>The biocapsules of fungi were formulated at a higher spore load of 1010 with HPMC <br/>coating and chitosan as carrier, following the protocol developed by Remya and Reji <br/>(2019).<br/>In the first field experiment to evaluate the efficacy of biocapsules in <br/>managing defoliators in amaranthus, it was revealed that, Metarhizium and Beauveria<br/>capsules @ 3 L-1<br/>sprayed twice (at weekly intervals) was effective causing 83.69 and <br/>69.97 per cent reduction in population of S. recurvalis respectively. Lower doses of 2 <br/>and 1 capsules L -1 were less effective causing, 47.39 to 66.5 per cent reduction in <br/>larval population. Spraying spore suspensions of these fungi @ 108 mL-1 resulted in <br/>91.27 to 100 per cent reduction, while in flubendiamide 39.35 SC, it was 89.84 per <br/>cent. Treatment with Metarhizium and Beauveria capsules did not affect the natural <br/>enemy population significantly, the mean population being 2.33 to 3.67 plant-1<br/>. The <br/>corresponding population was 1.44 in flubendiamide 39.5 SC and 3.67 in untreated <br/>control. The yield recorded in the plots treated with Metarhizium and Beauveria<br/>capsules @ 3 L<br/>-1 was high (2.67 and 2.30 kg plot-1<br/>) when compared to that in <br/>untreated plot 0.80 kg plot-1<br/>.<br/>Results of the second experiment to evaluate the efficacy of biocapsules in <br/>managing fruit and shoot borer E. vittella in okra concluded that, Beauveria capsule<br/>@ 3 L<br/>-1<br/>and Metarhizium capsule @ 3 L-1 were equally effective when sprayed at <br/>weekly intervals leading to 84.96 and 79.64 per cent reduction in the shoot damage <br/>respectively. The percentage reduction in shoot damage was only 65.32 to 73.86 per <br/>cent reduction in lower doses of capsules. In plots treated with spore suspensions, the <br/>mean shoot damage recorded was 90 to 95 per cent. Percentage reduction in <br/>chlorantraniliprole 18.5 SC was 90.71. Considering the fruit damage, Metarhizium<br/>capsule @ 3 L-1 was found to be the best treatment causing 100 per cent reduction in <br/>damage caused by E. vittella, while it was 89.75 per cent with Beauveria capsule@ 3 <br/>L<br/>-1<br/>. Reduction in fruit damage ranged from 67.82 to 82.81 per cent in the lower doses <br/>of capsules. Highest reduction in the fruit damage observed with spore suspensions of <br/>Beauveria and Metarhizium @ 108 mL-1 (93.16 and 100 per cent, respectively). <br/>Similar results were obtained in the case of okra leaf roller, Metarhizium @ 2 L-1<br/>and<br/>Beauveria capsule @ 3 L -1 were found to be the best treatment causing 96.38 and <br/>85.80 per cent reduction in population of Sylepta derogata F., while it was 80.23 per <br/>cent with Metarhizium capsule @ 3 L-1<br/>. Reduction in population ranged from 41.35 -<br/>68.72 per cent in the lower doses of capsules. Highest reduction in the population of <br/>S. derogata observed with spore suspensions of Beauveria and Metarhizium @ 108 <br/>mL-1 (100 per cent). Percentage reduction in chlorantraniliprole 18.5 % SC was 93.41. <br/>Treatment with biocapsules capsules did not cause any adverse affect on natural <br/>enemy population, in okra field. The yield obtained from different treatments did not <br/>vary significantly. <br/>Third experiment in cowpea field revealed that, foliar application of <br/>L. saksenae capsule @ 3 L<br/>-1<br/>and L. lecanii capsule @ 3 L-1 were equally effective to <br/>A. craccivora when sprayed twice (at weekly intervals) causing 94.38 and 92.28 per <br/>cent reduction in the population respectively. Reduction in population noted was <br/>57.54 to 63.96 per cent with lower dose @ 2 capsules L-1 while it was least with single <br/>capsule treatment (37.51 to 44.73 per cent). The spore suspensions were more <br/>effective resulted than the lower doses (78.73 - 83.53 per cent reduction). The <br/>chemical check thiamethoxam 25 WG recorded 95.79 per cent reduction in <br/>population. Biocapsule treatment did not affect natural enemy population <br/>significantly. The yield recorded in the plots with L. saksenae capsules @ 2 and 3 L-1 <br/>was high (1.85 and 1.56 kg plot-1<br/>) when compared to other treated plots and untreated <br/>plot (1- 1.45 kg plot-1<br/>).<br/>Therefore, it is concluded that biocapsules of Metarhizium and Beauveria, can <br/>effectively manage defoliators in amaranthus and borers in okra and those of <br/>L. lecanii and L. saksenae can be recommended for pea aphids, without affecting the <br/>natural enemies and yield significantly. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Agricultural Entomology |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Entomopathogenic fungi |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Vegetable pests |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Reji Rani O P(Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://krishikosh.egranth.ac.in/handle/1/5810190100 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Item type | Theses |
| 546 ## - LANGUAGE NOTE | |
| Language note | English |
| Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 07/07/2022 | 632.6 PAR/FI PG | 175340 | 07/07/2022 | Theses |