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Management of Exelastis Atomosa (Walsingham) Based on Spray Schedule at Different Growth Stages of Pigeon

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Management of Exelastis Atomosa (Walsingham) Based on Spray Schedule at Different Growth Stages of Pigeon Journal of Entomology and Zoology Studies 2019; 7(4): 456-460 E-ISSN: 2320-7078 P-ISSN: 2349-6800 Management of Exelastis atomosa (Walsingham) JEZS 2019; 7(4): 456-460 © 2019 JEZS based on spray schedule at different growth Received: 14-05-2019 Accepted: 16-06-2019 stages of pigeon pea Savde VG Dept. of Agril. Entomology, College of Agriculture, Parbhani, Savde VG, Kadam DR, Ambad RB and Patil SK VNMKV, Parbhani Maharashtra, India Abstract Study revealed during Kharif-2017-18 and 2018-19 pooled on variety basis, the BDN-711 noted (0.31, Kadam DR Dept. of Agril. Entomology, 0.34, 0.40 and 0.75 larva/plant), (0.25, 0.30, 0.47 and 0.81) and (0.28, 0.32, 0.43 and 0.78 larva/plant) College of Agriculture, Parbhani, and least larval count found when crop was sprayed at 50% flowering stage crop growth stage basis VNMKV, Parbhani (0.75, 0.85, 1.15 and 2.06 larva/plant), (0.58, 0.79, 1.36 and 2.26 larva/plant) and (0.66, 0.82, 1.26 and st rd th th st nd Maharashtra, India 2.16 larva/plant) at 1 , 3 , 7 and 14 DAS, respectively after 1 , 2 spray and pooled on four different varieties of pigeon pea viz., BDN-711 (early), BSMR-736 (late), BSMR-853 (late) and BSMR-716 (mid- Ambad RB late) were observed under field condition in split plot design with two sprays of emamectin benzoate 5% Dept. of Agril. Entomology, SG @ 4.4 gm followed by flubendiamide 39.3% SC @ 3.9 ml/10 lit of water at 15 days interval were College of Agriculture, Parbhani, taken at various crop growth stages. VNMKV, Parbhani Maharashtra, India Keywords: E. atomosa, different cultivars, pigeon pea, emamectin benzoate, flubendiamide Patil SK Dept. of Agril. Entomology, 1. Introduction College of Agriculture, Parbhani, On pigeon pea (Cajanas cajan (L) Millsp.) about 250 species of insect pests belongs to 8 VNMKV, Parbhani orders and 61 families had reported by several researchers (Davies and Lateef, 1977) [1]. Maharashtra, India Imperative pests infesting pigeon pea crops are pod borer, Helicoverpa armigera (Hubner), plume moth, Exelastis atomosa (Walsingham), pod fly, Melanogromyza obtusa (Malloch), spotted pod borer, Maruca vitrata (Fabricius), Among the constituents of the pod borer community infesting pigeon pea, the plume moth, Exelastis atomosa Walshigham (Lepidoptera: Pterophpridae) posses serious menace to its cultivation, larva bore into unopened flower buds for consuming the developing anthers and more damage is seen during flowering, pod maturing and pod filling stage and reported that on an average, the pod damage in pigeon pea to plume moth was 8.9% and grain damage was 4.0%. Further, a common recommendation regarding stage of crop and pest management cannot satisfy the demand of optimum yield. Hence an attempt was made to find out the most effective time of spraying in respect to crop stage that can provide satisfactory pest control. 2. Materials and site of experiment The field experiment was conducted during Kharif 2017-18 and Kharif 2018-19 at the Experimental Farm of Department of agricultural Entomology, Vasantrao Naik Marathwada Krishi Vidyapeeth, Parbhani (MH) in split plot design with three replications on four different varieties of pigeon pea as BDN- 711, BSMR- 736, and BSMR-853 BSMR-716 with a spacing of 120 cm x 30 cm. 2.1 Experimental Detail: 1. Year and Season : Kharif-2017-18, and Kharif -2018-19. 2. Name of crop : Pigeon pea 3. Varieties : BDN-711 (Early), BSMR-736 (Late), BSMR-853 (Late) and BSMR-716 (Mid-late). Correspondence 4. Design : Split plot Design Savde VG 5. Spacing : 120 cm 30 cm Dept. of Agril. Entomology, College of Agriculture, Parbhani, 6. Net plot size : 4.8 m 4.2 m VNMKV, Parbhani 7. No. of treatments : 06 Maharashtra, India 8. Replication : 03 ~ 456 ~ Journal of Entomology and Zoology Studies 9. Number of plots : 72 10. Date of sowing : 16/06/2017 (1st year) and 20/06/2018 (2nd year) Treatment details Spray No. Name of Insecticides Concentration (%) Dose /10 litre of water 1st Emamectin benzoate 5% SG 0.0022 4.4 g 2nd Flubendiamide 39.3% SC 0.0078 3.9 ml A) Main Plot Treatment: Variety T5-50% flowering stage 0.66 larvae/plant whereas maximum V1- BDN-711 (Early), V2 - BSMR-736 (Late) V3 -BSMR - at pod formation stage 1.49 larvae/plant. At 3rd, 7th and 14th 853 (Late) and V4 - BSMR-716 (Mid late), 1.26 and 2.16 whereas maximum incidence were recorded when then the crop was sprayed at pod formation stage i.e. B) Sub Plot Treatments: (Crop growth stages) 1.67, 2.05, and 2.72, respectively. st nd T1 : 1 spraying at bud initiation stage followed by 2 spraying after 15 days 3.1.3 Interaction effect st nd T2 : 1 spraying at 50% bud formation stage followed by 2 The interaction effect of variety and spray schedules on spraying after 15 days incidence of E. atomosa after first and second spray over all st nd T3 : 1 spraying at flower initiation stage followed by 2 pooled data (Table 2, 3, 4 and 5) showed minimum larval spraying after 15 days count observed at 50% flowering stage at first day 0.57, 0.88, st nd T4 : 1 spraying at 10% flowering stage followed by 2 0.62 and 0.55 at third day 0.64, 1.01, 0.85 and 0.79 at seventh spraying after 15 days day 1.01, 1.30, 0.37 and 1.35 at fourteenth day 1.87, 2.37, st nd T5 : 1 spraying at 50% flowering stage followed by 2 2.20 and 2.21larvae/plant. Whereas the maximum incidence spraying after 15 days was at first day 1.12, 1.63, 1.53 and 1.68 at third day 1.28, st nd T6 : 1 spraying at pod formation stage followed by 2 1.77, 1.77 and 1.89 at seventh day 1.58, 2.13, 2.16 and 2.32 at spraying after 15 days fourteenth day 2.52, 2.69, 2.67 and 3.02 larva/plant (Table 51, 52, 53 and 54) recorded at treatment T6-pod formation stage Method of recording observations of larval population of among all test varieties V1-BDN-711, V2-BSMR-736, V3- E. atomosa BSMR-853 and V4-BSMR-716, respectively. The observations on larval population were noted on randomly selected five plants from each treatment 1 day 3.2 Per cent reduction of larval population of E. atomosa before and 1, 3, 7 and 14 days after each application of Data pertaining to per cent reduction of larval population of insecticides. The data obtained in insect numbers were E. atomosa after first and second spray and over all pooled during both the year are presented in Table 1. subjected to poison formula before further analysis. The analysis of pooled data was carried out to 3.2.1 Varietal performance against per cent reduction of ascertain effect of different spraying dates on management of larval population of E. atomosa pod borer complex of pigeon pea and their effect on natural The least per cent of larval reduction were found in V - enemies of pod borer complex. Appropriate statistical 2 BSMR-736 (62.07, 57.98, 48.11 and 23.39 per cent reduction methods were employed to work out standard error (SE) and over control) and maximum in V -BDN-711 (74.29, 70.87, critical difference (CD) to know the significance of treatments 1 60.53 and 28.68 per cent reduction over control) at first, (Gomez and Gomez, 1984) [2]. second, third and fourth days after spraying, respectively. 3. Findings 3.2.2 Effect of spray schedule on per cent reduction of 3.1 Effect of different spray schedule against E. atomosa larval population of E. atomosa Data pertaining to the effect of spray schedule on The data from Table 1 revealed that per cent reduction in management of E. atomosa are presented in Table 1. larval population of E. atomosa recorded at different days after first and second spray pooled showed significant 3.1.1 Performance of different varieties differences among various crop growth stages. The least per The observation regarding performance of varieties against cent of larval reduction were found in treatment T -pod infestation of E. atomosa revealed that, least larval population 6 formation stage (58.05, 52.80, 42.31 and 23.25 per cent 0.28, 0.32, 0.43 and 0.78 larva/plant at 1st, 3rd, 7th and 14th reduction over control) and maximum in treatment T - 50% DAS on variety V -BDN-711, respectively. At first DAS 5 1 flowering stage (79.08, 73.81, 59.84 and 31.01 per cent larval population observed on variety V -BDN-711 found at 1 reduction over control) at first, second, third and fourth days par with the population recorded on variety V -BSMR-853 3 after spraying, respectively. (0.36 larva/plant) and V -BSMR-716 (0.37 larva/plant). At 4 The reviews regarding effect of spraying dates applied at 3rd, 7th and 14th DAS the population of E. atomosa on variety various crop growth stages and there interaction are quite V -BDN-711 observed at par with the population noted on the 1 amalgamate since this is a new affect to study in rest of all varieties. entomological research. The work done and reviews reported by earlier worker regarding parallel issues are being presented 3.1.2 Effect of spray schedules here. Wadaskar et al., (2012) [8] revealed spraying of There was no larval population of E.
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