Efficacy of Subhash Palekar’s natural formulations against insect pest complex of pigeonpea at Pantnagar, Uttarakhand
| dc.contributor.advisor | Tiwari, Ruchira | |
| dc.contributor.author | Mahankuda, Bhabani | |
| dc.date.accessioned | 2021-02-17T09:19:45Z | |
| dc.date.available | 2021-02-17T09:19:45Z | |
| dc.date.issued | 2020-12 | |
| dc.description.abstract | or : Dr. Ruchira Tiwari The present study was carried out to validate the efficacy of four Subhash Palekar’s Natural Formulations (SPNF) namely agniastra, neemastra, dashparni and jivamrit along with panchagavya @3%, desi cow urine and buffalo urine @20% against insect pest complex of pigeonpea under field conditions at NEBCRC, Pantnagar, Uttarakhand during kharif crop seasons 2018-19 and 2019-20. Field experiments were also carried out to study the diversity, succession and population dynamics of different insect pests and natural enemies on pigeonpea along with their correlation with different weather parameters. Whereas, laboratory experiments were also carried out at Department of Entomology, GBPUAT, Pantnagar to study the biology, effect of natural formulations on feeding preference (orientation), feeding inhibition (antifeedant activity) and growth and development of spotted pod borer (Maruca vitrata) and pod bug (Clavigralla gibbosa) on pigeonpea. A total number of twenty-four insects attacking to the pigeonpea crop and their associated nine natural enemies were reported during the study. A constant association of insect pests with the crop was observed, starting from the vegetative stage to maturity. On the basis of abundance and population dynamics of different insect pest; jassids (5.18/plant), leaf folder (11.10/plant) and leaf webber (2.57/plant) can be considered as minor pests during the vegetative crop, as they didn’t cause any significant damage to the crop. Whereas, with the onset of flowering, attack of spotted pod borer (24.7/plant), pod bug (14.8/plant) and gram pod borer (7.13/plant) were reported on the crop. These three pests can be categorized as major pests during the reproductive stage causing significant damage to the economic parts of the crop and contributing to yield loss. A total number of three sprays were carried out during the field experiment to study the efficacy of different natural formulations against spotted pod borer, pod bug and gram pod borer. The order of efficacy remained the same as Chlorantraniliprole followed by agniastra, neemastra, dashparni, desi cow urine, panchagavya, buffalo urine and jivamrit for spotted pod borer and gram pod borer during both the kharif crop seasons 2018-19 and 2019-20. However, dashparni was found most effective for pod bug amongst all the natural formulations. Agniastra was found most effective amongst the natural formulations with 6.09 maruca webs/plant. The pooled mean population of pod bugs varied from 1.65-5.67 bugs/plant with minimum and maximum population in chlorantraniliprole and untreated control plots, respectively. Whereas, dashparni was found the best among the natural formulation with 1.81 bugs/plant. Similarly, Chlorantraniliprole was found most effective against Helicoverpa larvae followed by agniastra with 1.65 and 1.75larvae/plant, respectively as compared to 5.05 larvae/plant in plots of untreated pigeonpea crop. These natural formulations didn’t have any significant adverse effects against the natural enemies. Similarly, all the natural formulations were found effective against spotted pod borer and pod bug under the laboratory experiment. However, among SPNF, agniastra was found most effective against spotted pod borer and dashparni against pod bug during all the laboratory experiments. Amongst the treatments, agniastra reported least number of insect orientation (0.08) and low preference index (0.33) with no healthy adult emergence of spotted pod borer. Whereas, dashparni reported the least number of insect orientation (0.08) and low growth index value (1.36) against pod bug. The results obtained through present experiments clearly revealed the efficacy of Subhash Palekar’s natural formulations against different insect pest of pigeonpea. Thus, it can be concluded that in order to reduce the hazards of chemical farming, Subhash Palekar’s natural formulations can safely be incorporated in different IPM modules of pigeonpea for sustainable insect pest management. | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810161292 | |
| dc.keywords | formulations, insect pests, pigeon peas, Uttarakhand | en_US |
| dc.language.iso | English | en_US |
| dc.pages | 278 | en_US |
| dc.publisher | G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand) | en_US |
| dc.research.problem | Pigeon Peas | en_US |
| dc.sub | Entomology | en_US |
| dc.theme | Insect Pests | en_US |
| dc.these.type | Ph.D | en_US |
| dc.title | Efficacy of Subhash Palekar’s natural formulations against insect pest complex of pigeonpea at Pantnagar, Uttarakhand | en_US |
| dc.type | Thesis | en_US |