000			03767nam a22002417a 4500
003			OSt
005			20250306153836.0
008			250306b ||||| |||| 00| 0 eng d
040			_cCPGS
100			_aKalita, karishma _910326
245			_aVarietal screening of Okra (Abelmoschus esculentus L.) against major insect pests and their bio-intensive management _ckarishma Kalita
260			_aUmiam : _bCPGSAS, CAU(Imphal), _cSeptemebr 2024.
300			_a81p.
440			_a[Entomology, School of Crop Protection] _99081
504			_aIncludes bibliographical references.
520			_aThe current study was carried out utilizing the objectives of screening most commonly grown okra varieties against the major insect pests, their population dynamics and evaluating the efficacy of various bio-pesticides and insecticide for their management. Experiments were conducted at Experimental Farm, CPGS-AS, CAU (I), Umiam, Meghalaya. Six okra varieties viz., Pusa Sawani, Punjab Padmini, Arka Anamika, Red Bhindi, Pusa Padmini and Parbhani Kranti were screened to research the infestation level of major insect pests. Pusa Sawani was recorded the most resilient variety (22.37%) whereas Arka Anamika the most vulnerable (44.84%). For the analysis of insect pests population dynamics, the variety Arka Anamika was selected. A total of 13 insect species were recorded, out of which 9 were pests and 4 are natural enemies belonging to 4 orders and 11 families. Among all the insect pests recorded aphid, Aphis gossypii caused 96.87% infestation followed by leafhopper A. biguttula biguttula (36.67%), fruit borer, E. vittella (31.45%) and whitefly, Bemisia tabaci (12.18%) and thus were considered the important pests of okra. The occurrence of significant important pests was negatively non-significant with highest temperature (r= -0.26) and positively significant with lowest temperature (r= 0.52) and relative humidity (r= 0.573) during summer season 2024. To evaluate the efficacy of biopesticides and insecticide for control of significant insect infestation, the experiments were laid in RBD (Randomized Block Design) with 6 treatments and 4 replications during March-July, 2024. The treatments included Bacillus thuringiensis var. kurstaki, UmLec (Lecanicillium lecanii), UmComb {Beauveria bassiana + Metarhizium robertsii (M. aniospliae) + Trichoderma harzianum + Lecanicillium lecanii + Pseudomonas fluorescens}, Neem oil (0.03%) and Profen super (Profenfos 40% + Cypermethrin 4% EC). Among all the treatments Profen super (Profenfos 40% + Cypermethrin 4% EC) was most effective in controlling leafhopper (A. biguttula biguttula), aphid (A. gossypii) and whitefly (B. tabaci) with a percent reduction of (70.05%, 68.87% and 66.46%) over control and had significantly highest yield (7.12 t/ha). For fruit borer (E. vittella), Bacillus thuringiensis var. kurstaki was highly effective with 48.19% percent reduction over control. The highest percent corrected mortality 49.95%, 56.81% and 61.21% was documented in T5 treatment Profen super (Profenfos 40% + Cypermethrin 4% EC) for leafhopper (A. biguttula biguttula), aphid (A. gossypii) and whitefly (B. tabaci) whereas the highest corrected mortality (34.59%) was found in T1 treatment (Bacillus thuringiensis var. kurstaki) for fruit borer (E. vittella). Highest B:C ratio was obtained in the treatment T5, Profen super (2.86:1). Among all the biopesticides, highest B:C ratio was observed in treatment T3 UmComb (2.63:1).
650			_aBacillus thuringiensis var. kurstaki _910327
650			_aPopulation dynamics _910328
650			_aOkra _xArka Anamika. _910329
700			_aPathak, Mahesh _eMajor Advisor. _99325
856			_uhttps://krishikosh.egranth.ac.in/handle/1/5810220689 _yOnline.
942			_2ddc _cTH
999			_c5718 _d5718