Kudāl, India
Kudāl, India

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Jadhav S.P.,Dr. B.S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station
Pestology | Year: 2012

Results of the field experiment conducted to screen some promising genotypes of chickpea against pod borer, Helicoverpa armigera (Hubner) indicated that the mean per cent pod damage within the twenty genotypes tested varied between 8.48 to 33.06. The mean grain yield was ranged from 12.08 to 41.39 q/ha. The genotype Phule G-105-14-1 recorded lowest mean per cent pod damage of 8.48 and second highest yield of 40.74 q/ha. The genotype Phule-G-7104 exhibited mean per cent pod damage of 9.61 and registered highest yield of 41.39 q/ha. The genotype Phule G-06302 and local kabuli recorded maximum per cent pod damage of 30.04 and 33.04, respectively. The lowest yield of 12.08 q/ha was exhibited by genotype Virat followed by Rajas (14.68 q/ha) and Vishal (14.73 q/ha).


Pawar M.V.,Dr. B.S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station
Pestology | Year: 2012

A laboratory experiment was conducted to study the effect of Corcyra eggs obtained from different rearing media on the development of Chrysoperla zastrowi arabica (Henry). The results revealed that the treatment differences regarding feeding potential are non-significant indicating equal preference by the predatory grub to various eggs. The larval period and larval weight of all the three instar grubs were in the range of 1.9 to 3.3 days and 1.65 to 8.17 mg, respectively in all the treatments. The maximum weight of pupa of Chrysoperla was observed in T 6 (7.39 mg) and minimum in T 4 (5.97 mg). Regarding the period of pupal stage, the treatment differences were non significant. Regarding per cent adult emergence, the statistical differences among all treatments were non significant. The maximum number of females were observed in T 1 (1:1.53) and minimum in T 4 (1:0.87). The maximum and minimum weights of both female and male were observed in T 3 (3.87 mg and 3.51 mg) and T 8 (3.68 and 3.38 mg). Longevity of female was in the range of 6.40 to 7.73 and male was 4.87 to 5.83 days, in different treatments.


Pawar M.V.,Dr. B.S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station
Pestology | Year: 2012

Results of the laboratory experiment to study the bionomics of Corcyra cephalonica (Stainton) on different rearing media revealed that the incubation period was ranged from 2.3 to 4.0 days in different treatments. It was highest in T 1, T 2 and T 6 and lowest in T 4. The length, breadth and head width of all the six instar larvae was in the range of 0.96 to 14.26 mm, 0.15 to 1.41 mm and 0.17 to 0.69 mm, respectively in different treatments. The weight of fifth instar larvae was ranged from 22.80 to 40.20 mg, maximum in T 6 and minimum in T 2. The total larval developmental period was observed maximum in T 6 (26.7 days) and minimum in T 7 (17.7 days). The length, breadth, weight and developmental period of pupa was in the range of 11.41 to 12.80 mm, 1.16 to 1.57 mm, 24.13 to 37.20 mg and 8.9 to 12.2 days, respectively in different treatments. The maximum per cent adult emergence was observed in T 7 (52.00) and minimum in T 7 (31.67). The sex ratio was in the range of 1:0.81 to 1:1.57. Maximum and minimum survival periods of male was recorded in T 7 (11.13 days) and T 8 (9.13 days) while in female were recorded in T 7 (5.80 days) and T 4 (4.33 days), respectively. The fecundity was in the range of 259.53 to 401.53 eggs in different treatments.


Jalgaonkar V.N.,Regional Fruit Research Station | Naik K.V.,Agril Research Station | Mule R.S.,Regional Rice Research Station | Pawar S.S.,Regional Rice Research Station
Pestology | Year: 2011

A field experiment conducted at Agronomy farm, College of Agriculture, Dapoli during Kharif season for evaluating eight different insecticides against leaf roller, Sylepta derogata (Fabricius) on okra, revealed that at first spray and second spray, the insecticide Cypermethrin at 0.05 per cent concentration was most effective against the leaf roller at 7 DAS (Average 0.25% and 0.01% leaf damage, respectively) and 14 DAS (average 0.10% and 0.00% leaf damage, respectively) and produced significantly higher yield. This was followed by Monocrotophos at 0.04 per cent concentration after 7 DAS (Average 0.35% and 0.06% leaf damage) and 14 DAS (Average 0.18% and 0.00% leaf damage), quinalphos at 0.05 per cent concentration at 7 DAS and 14 DAS of first spray (Average 0.45% and 0.18% leaf damage) and Endosulfan at 0.05 per cent concentration at 7 DAS and 14 DAS of second spray (Average 0.08% and 0.01% leaf damage). The neem product (Azadirachtin 1500 ppm) @ 5 ml/litre of water was found to be least effective at 7 DAS (Average 2.40% and 0.60% leaf damage) and 14 DAS (Average 1.35% and 0.35% leaf damage) after both the sprays for control oiS. derogata. The treatment with Mechanical control (i.e, mechanical destruction of infested leaves) though ineffective after 7 DAS and 14 DAS of first spray was found to be effective at 7 DAS and 14 DAS of the second spray when was synchronized with the insecticidal application.


Jadhav S.P.,Dr. B.S. Konkan Krishi Vidyapeeth | Patil R.S.,Dr. B.S. Konkan Krishi Vidyapeeth | Mehendale S.K.,Dr. B.S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station
Pestology | Year: 2012

The Results of the field experiment conducted to test effect of some components of IPM against H. armigera infesting chickpea, Cicer arietinum revealed that the treatment T7 consisting of IPM components viz., hand collection and destruction of larvae a day before each spraying, alternate sprays of NSKE 5 per cent, Bt var. kurstaki and HaNPV 250 LE/ha at 15 days interval starting from 50 per cent initiation of flowering, growing 10 days old marigold seedlings all along the border as trap crop at the time of sowing of main crop, installation of pheromone of Helicoverpa armigera (1 trap/treatment) at the time of 50 per cent initiation of flowering and installation of bird perches (1 perch/treatment) was found more promising and economical than all other components of IPM on the basis of lowest cumulative mean larval population (1.57/10 plants), lowest mean per cent pod damage (8.49), maximum grain yield (28.09 q/ha), highest net income (Rs 54971/-/ha) and maximum ratio of incremental returns (1:3.84). The treatment T5 consisting of hand collection and destruction of larvae, application of Bt var, kurstaki @ 1gm/litre of water at 45 and 75 days after sowing and HaNPV @ 250 LE/ha at 60 days after sowing was ranked second best treatment in order of merit.


Dubale J.J.,Dr. Balasaheb Sawant Konkan Agricultural University | Patil R.D.,Dr. Balasaheb Sawant Konkan Agricultural University | Mule R.S.,Dr. Balasaheb Sawant Konkan Agricultural University | Mule R.S.,Agril Research Station | And 2 more authors.
Pestology | Year: 2010

A supervised trial was undertaken to study the dissipation pattern of Cypermethrin insecticide in mango (Mangifera indica L. cv. Alphonso) fruits during the summer of 2005. Cypermethrin was sprayed at the concentration of 0.0075 per cent by volume on mango when the fruits were at egg size stage. The residues were estimated by GLC equipped with ECD, sensitive to 0.05 ppm of analytes. The initial residues of 0.2474 ppm dissipated to below MRL of 0.2 ppm within 2.34 days and reached to BDL (0.05 ppm) within 14.92 days. The residual half life value was 8.28 days. Hence, a waiting period of 2-3 days for the safe consumption of fruits is must.


Dubale J.J.,Dr. Balasaheb Sawant Konkan Agricultural University | Patil P.D.,Dr. Balasaheb Sawant Konkan Agricultural University | Mule R.S.,Dr. Balasaheb Sawant Konkan Agricultural University | Mule R.S.,Agril Research Station | And 2 more authors.
Pestology | Year: 2010

Dissipation of residues of endosulfan was studied in mango (Mangifera indica L. cv. Alphonso) fruits under field conditions during summer of 2005. Endosulfan was applied at the concentration of 0.05 per cent by volume on mango trees when the fruits were at egg size stage. The residues were estimated by GLC equipped with ECD, sensitive to 0.01 ppm of analytes. The initial residue was 1.233 ppm which was less than the maximum residue limit of 2 ppm. The residual half life value was 3.0 days.


Rupnar A.H.,Dr. B. S. Konkan Krishi Vidyapeeth | Patil R.S.,Dr. B. S. Konkan Krishi Vidyapeeth | Mule R.S.,Dr. B. S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station
Pestology | Year: 2011

Results of the laboratory experiment conducted to study preference/susceptibility of some promising varieties of rice to Corcyra cephalonica (Stainton) under storage indicated that the maximum and minimum mean ovipostion period of 5.0 and 3.0 days were recorded on Sahyadri-4, Karjat-6, Karjat-7, R-24 and Sahyadri-3, respectively. The maximum mean number of eggs (300.33) were deposited on Karjat-6 followed by Sahyadri-1 and Sahyadri-2. The relatively minimum number of eggs (188.66) were deposited on Sahyadri-4. The significantly longest mean incubation period of 4.33 days was observed on Sahyadri-4 while the lowest of it was noticed on Sahyadri-3 (3.50 days) followed by Sahyadri-1, Karjat-6 and Karjat-7 (3.66 days each). The percentage of eggs hatched on variety Sahyadri-3 (97.77) was significantly higher than all other varieties of rice except Sahyadri-2 (93.33). The Ist, II nd, IIIrd, IVth, Vth and VI th larval instar of C. cephalonica lasted for 3.03, 4.03, 5.76, 7.80, 6.90 and 7.33 days, respectively. The mean larval period was ranged from 30.51 to 41.55 days. The maximum and minimum larval durations were noticed on Karjat-5 and Sahyadri-2 respectively. Among ten varieties of rice, larval development was relatively faster on Sahyadri-2 and Sahyadri-4 as indicated by the shortest period of larval development. The lowest pupal period of 6.27 days was recorded on Sahyadri-1 while it was longest on Karjat-5 (10.77 days). The maximum mean larval and pupal weight was noticed on Sahyadri-2 (28.29 mg) and Palghar-l (21.69 mg), respectively. However, the minimum larval and pupal weight of C. cephalonica was recorded on Sahyadri-1 (18.86 and 17.60 mg, respectively). The maximum mean per cent adult emergence of 92.10 was noticed on variety Sahyadri-3, followed by Karjat-5 (91.60) and Sahyadri-4 (88.04). The maximum mean male to female sex ratio was recorded on Karjat-5 (1:1.19) followed by Sahyadri-1 and Karjat-7. The mean per cent loss in weight of grains was maximum on Sahyadri-2 (11.09) while variety Karjat-5 recorded minimum per cent loss of 5.98. On the basis of per cent loss in weight, Sahyadri-2 and Sahyadri-1 were found relatively more susceptible to rice moth. Karjat-5 and Panvel-2 were observed least susceptible to rice moth.


Mane P.H.,Dr. B. S. Konkan Krishi Vidyapeeth | Mane P.H.,Agril Research Station | Mule R.S.,Dr. B. S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station | Patil R.S.,Dr. B. S. Konkan Krishi Vidyapeeth
Pestology | Year: 2011

Results of the laboratory experiments conducted to test ovicidal effect of aqueous extracts of seven plant species against S. litura indicated that the hatchability of eggs was reduced almost in all the treatments with plant species except the treatment with 7.5 per cent leaf extract of davana (DLE). The maximum mean per cent unhatched eggs of 65.00 was recorded in the treatment with 10.0 per cent neem seed kernel extract (NSKE) and 10.0 per cent kumbha fruit extract (KFE) followed by 10.0 per cent rantulas leaf extract (55.00). Amongst the methanol extracts of plant species, the mean per cent eggs unhatched within the treatments with plant extracts was varied between 25.00 to 75.00. The maximum mean per cent of unhatched eggs was noticed in the treatment with 10.0 per cent NSKE (75.00). The treatments with 10.0 per cent leaf extract of ranmodi and rantulas were ranked second best treatments in order of merit with mean per cent unhatched eggs of 65.00. The leaf extract of davana (DLE) possess exhibited least effect on hatchability of eggs.


Mane P.H.,Dr. B. S. Konkan Krishi Vidyapeeth | Patil R.S.,Dr. B. S. Konkan Krishi Vidyapeeth | Mule R.S.,Dr. B. S. Konkan Krishi Vidyapeeth | Mule R.S.,Agril Research Station
Pestology | Year: 2011

Results of the laboratory studies conducted to evaluate the effect of aqueous extracts of seven selected plant species against 3 rd instar larvae of Spodoptera litura Fab. revealed that the treatments with 10.0 per cent leaf extract of rantulas (RTLE), Hypitis suaveolens (L.) Point, as well as Ranmodi (RMLE), Eupatorium odoratum L. and neem seed kernel extract (NSKE), Azadirachta indica A. Juss. were found comparatively superior over others in efficacy but at par with each other causing mean per cent larval mortality of 40.00 to 50.00 one, three and five days after treatment. The mean per cent pupal formation within the treatments of plants was ranged between 58.33 to 100.0. The lowest mean per cent pupal transformation was found in 10.0 per cent leaf extract of ranmodi (RMLE). The treatment with 10.0 per cent NSKE resulted in mean per cent adult emergence of 29.17 as against 89.44 in control.

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