INCIDENCE OF FALL ARMYWORM, Spodoptera frugiperda (J.E. SMITH) IN MAIZE AND THEIR MANAGEMENT THROUGH NEWER INSECTICIDES
| dc.contributor.advisor | Mukesh Kumar Mishra | |
| dc.contributor.author | VIMAL KANAUJIYA | |
| dc.date.accessioned | 2023-12-11T11:56:40Z | |
| dc.date.available | 2023-12-11T11:56:40Z | |
| dc.date.issued | 2023-08-04 | |
| dc.description.abstract | The present investigations were carried out at PG Research Farm of College of Agriculture, BUAT, Banda during Kharif 2022 for study the incidence of fall armyworm, (S. frugiperda J. E. Smith) on maize and their management through newer insecticides. The popular maize variety NHM-3899 was grown in 150m2 area for study of population dynamics and 20m2 each plot size with 7 treatment and 3 replications for management. The result revealed that the fall armyworm first noticed on seedling stage of the crop growth and continued till maturity. The larval population of S. frugiperda appeared first in 33rd Standard week (13th to 19th August) with its mean of 0.10 larvae plant-1and reached to its maximum (6.92 larvae plant-1 ) in 3 rd week of September (38th SW). The damage caused by S. frugiperda was estimated in the term of per cent leaf damage, which ranged between 0.37 to 60.16 per cent with variability during crop growth stages. Among two predatory species viz., coccinellids and spiders were prevalent and first noticed in 3 rdweek of August (33rd SW) with the initial population of 0.16 grub & adult plant-1 and 0.28 plant-1 , respectively with the occurrence of larval population S. frugiperda in field. The population of coccinellids attended its peaks (1.12 plant-1 ) in 36th SW, whereas the peak of spiders (1.68 plant-1) was recorded in 38thSW and it was gradually increased with an increase of the larval population fall armyworm and correlated significantly with a positive correlation of r= 0.657 & r= 0.699, respectively. Among the weather variables, only rainfall (r= 0.623) had significant correlation with larval population of S. frugiperda. However, none of the variables had shown significant correlation with per cent leaf damage. The regression equation evident that all the parameters (predators and weather parameters) jointly contribute 97 per cent abundance of larval population of fall armyworm, whereas joint effect of both predators had 72 per cent influenced (72 per cent) while joint effect of all the weather variables contributed only 57 percent abundance of larval population of fall armyworm. Among tested insecticides, chlorantraniliprole 18.5SC @ 40g a.i. ha-1 followed by spinetoram 11.7 w/w SC @ 30g a.i. ha-1 and emamectin benzoate 5 SG 20g a.i. ha-1 were found most effective against S. frugiperda that significantly reduced the larval population and gave higher field bio-efficacy in maize. These three insecticides showed 81.98, 80.57 and 77.26 per cent larval population reduction, respectively over control. The maximum yield (50.33 qha-1 ) and net return (Rs.45959.31 ha-1 ) were recorded from spinetoram 11.7 SC followed by chlorantraniliprole 18.5 SC. However, the maximum C:B ratio (1:8.58) was recorded from emamectin benzoate 5 SG treated plot. | |
| dc.identifier.citation | VIMAL KANAUJIYA{2023},INCIDENCE OF FALL ARMYWORM, Spodoptera frugiperda (J.E. SMITH) IN MAIZE AND THEIR MANAGEMENT THROUGH NEWER INSECTICIDES, BANDA UNIVERSITY OF AGRICULTURE & TECHNOLOGY BANDA-210001, UTTAR PRADESH (INDIA) | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810202514 | |
| dc.language.iso | English | |
| dc.pages | 106 | |
| dc.publisher | BANDA UNIVERSITY OF AGRICULTURE & TECHNOLOGY BANDA-210001, UTTAR PRADESH (INDIA) | |
| dc.sub | Entomology | |
| dc.theme | ‘‘Incidence of fall armyworm, Spodoptera frugiperda (J. E. Smith) on maize and their management through newer insecticides” | |
| dc.these.type | M.Sc | |
| dc.title | INCIDENCE OF FALL ARMYWORM, Spodoptera frugiperda (J.E. SMITH) IN MAIZE AND THEIR MANAGEMENT THROUGH NEWER INSECTICIDES | |
| dc.type | Thesis |