International Journal of Plant Protection

D. V. Saner ¹, G. B. Kabre ², Y. A. Shinde

Affiliations
1 Department of Entomology, College of Agriculture, Dhule M.S., IN
2 Department of Entomology, C.P. College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar Gujarat, IN

Abstract

The field studies on efficacy of newer insecticides on sucking pests in Bt cotton under in Khandesh region of Maharashtra, India showed that out of 9 treatments, all were significantly reduced by the test synthetic chemical insecticides in comparision with untreated control. Population of jassid, aphid, thrip was promisingly suppressed by thiamethoxam 25 WG, fipronil 80 WG, followed by fipronil 5 SC, acetamiprid 20 SP, lambdacyhalothrin 5 SC, imidacloprid and triazophos. Population of whiteflies was effectively suppressed by thiamethoxam 25 WG, acetamiprid 20 SP, fipronil 80 WG followed by fipronil 5 SC, imidacloprid 70 WG, imidacloprid 17.80 SL, lambdacyhalothrin 5 SC and triazophos 40 EC. The promising insecticides against mealy bugs were found to be acetamiprid 20 SP, thiamethoxam 25 WG, fipronil 80 WG, lambdacyhalothrin 5 SC, triazophos 40 EC followed by imidacloprid 17.80 SL, fipronil 5 SC and imidacloprid 70 WG.

Keywords

Chemical Control, Cotton, Newer Insecticides, Sucking Pests

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S. S. Dixit ¹, G. B. Kabre ¹, V. V. Patil ¹

Affiliations
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M. S.), IN

Abstract

Different entophathogenic fungi were evaluated in field trials at the instructional farm of Krishi Vigyan Kendra (KVK) Dhule provided by Department of Entomology, College of Agriculture, Dhule for the management of mealy bug on custard apple in Kharif season of 2014-15. All the treatments were observed to be effective in reducing mealy bug infestation on custard apple. Among the evaluated insecticide and biopesticides the treatment with Verticillium lecanii 7.5 g/lit. was recorded significantly lowest mealy bug population and was was at par with Verticillium lecanii 5 g/lit. (12.74). The next best treatments protection included Trizophos 40 EC 3 ml/lit. (14.26) and it was at par with Verticillium lecanii 2.5 g/lit. (14.40). The next treatments in this respect were Metarhizium anisopliae 7.5 g/lit. (15.68), Metarhizium anisopliae 5 g/lit. (16.33), Beauveria bassiana 7.5 g/lit. (17.37), Metarhizium anisopliae 2.5 g/lit. (18.13), Beauveria bassiana 5 g/lit. (20.54) and Beauveria bassiana 2.5 g/lit. (22.25). There was an increase in mealy bug population in untreated check to the extent of 35.52 numbers of colonies as compared to treated plots.

Keywords

Custard Apple, Mealy Bug, Entomopathogenic Fungi.

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D. P. Birhade ¹, G. B. Kabre ¹, S. S. Khating ¹

Affiliations
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M.S.), IN

Abstract

Seasonal incidence of thrips on onion was evaluated in field trials at the instructional farm of Agricultural Entomology Section, College of Agriculture, Dhule during Kharif season of 2015-16. The data on average number of thrips per plant under field conditions along with weather parameters viz., temperature (maximum and minimum), relative humidity (morning and evening) and rainfall are correlated. The infestation of thrips was first observed at 2^nd week after transplanting in 38^th SMW, with population of 1.6 thrips/plant. The population of thrips above 5 thrips/plant was noticed from 4^th week of September i.e. 40^th SMW onwards. The peak incidence of 19.1 thrips/plant was recorded in 46^th SMW i.e. second week of November. The correlation of thrips with morning humidity (-0.7324)**, evening humidity (-0.7123)** and rainfall(-0.5820)* are negatively significant effect at 5 per cent and 1 per cent level with thrips.

Keywords

Onion, Thrips, Seasonal Incidence.

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S. S. Dixit ¹, G. B. Kabre ¹, V. V. Patil ¹

Affiliations
1 Department of Agricultural Entomology, College of Agriculture (MPKV), Dhule (M.S.), IN

Abstract

The effect of temperature, relative humidity and rainfall on population development of various stages of mealy bug on custard apple under field condition was studied during August 2014 to December, 2014. The incidence of mealy bug was observed in orchard in September 2014 (37^th SMW) and then gradually increases up to the month of November (i.e. 45^th meteorological week) and after that it decreases. The mealy bug population recorded highest (105.32 mealy bug per fruit) in the 45^th meteorological week when maximum and minimum temperature, morning and evening relative humidity were 33.6^oC and 18.3^oC, 65.6 and 30.4 per cent, respectively. The non-significant correlation between mealy bug on custard apple and various weather parameters studied clearly indicates that once the population of mealy bug started increasing climatic factors hardly played role in the development during the Kharif 2014 season. The population of natural enemies started increasing 45^th SMW onwards and that resulted in reduction of mealy bug population on custard apple.

Keywords

Custard Apple, Mealy Bug, Seasonal Incidence, Natural Enemies.

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V. V. Patil ¹, G. B. Kabre ¹, S. S. Dixit ¹, S. B. Desale ¹

Affiliations
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M.S.), IN

Abstract

Different entophathogenic fungi were evaluated in field trials at the instructional farm of Agril. Entomology Section, College of Agriculture, Dhule for the management of Onion thrips (Thrips tabaci L.) in onion during late Kharif season of 2014-15. All the treatments were observed to be effective in reducing thrips infestation on onion crop. Among the evaluated insecticide and biopesticides the treatment with profenophos 50 EC was recorded significantly lowest thrips population and was at par with Metarhizium anisopliae 7.5 g. The next best treatments in order of their efficacy was Verticillium lecanii 7.5 g, Metarhizium anisopliae 5 g, Metarhizium anisopliae 2.5 g and Verticillium lecanii 5 g, respectively. This was followed by Verticillium lecanii 2.5 g, Beauveria Bassiana 7.5 g, Beauveria bassiana 5 g and Beauveria Bassiana 2.5 g and were found effective to control onion thrips.

Keywords

Onion, Thrips, Entomophathogenic Fungi.

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Rohini Khedkar ¹, G. B. Kabre ²

Affiliations
1 College of Agriculture, Dhule (M.S.), IN
2 Department of Agricultural Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar(M.S.), IN

Abstract

Seasonal incidence of sucking pests in Kharif 2016 at College of Agriculture, Dhule revealed that, the leafhopper incidence reached its peak activity during the second week of October (6.64 leafhoppers/3 leaves/plant), whereas, the peak incidence of aphids was noticed in the third week of October (8.82 aphids/3 leaves/plant). The peak incidence of the whiteflies was recorded during the fourth week of October (8.02 whiteflies/3 leaves/plant). The peak incidence of the thrips was recorded during the third week of October (6.76 thrips/3 leaves/plant). The activity of predator lady bird beetle was at its peak during first week of October (2.94 lady bird beetles/plant), which is directly related with the activity of the sucking pest in field. The correlation between incidence of leaf hoppers (r = 0.205), aphids (r = 0.174), whiteflies (r = 0.206), thrips (r = 0.167), was positively non-significant with maximum temperature (T_max ). The minimum temperature (T_min ) showed negative significant correlation with whiteflies (r = -0.640**), thrips (r =-0.464*) and negative non-significant correlation with leafhoppers(r =-0.411) and aphids (r = -0.3111). The morning relative humidity (MRH) showed negative significant correlation with occurrence of whiteflies (r = -0.440*) and negative non significant correlation with occurrence of the leafhoppers(r = -0.123), aphids (r = -0.101) and thrips (r = -0.184). Similarly, the evening humidity (ERH) showed negative non significant correlation with the pests such as leafhoppers(r = -0.038), aphids (r = -0.021), whiteflies (r = -0.166) and thrips (r = -0.085) during Kharif 2016 season. The rainfall had negatively non significant effect at 5 per cent level of significance with leafhoppers, aphids, whitefly and thrips.

Keywords

Weather Parameters, Sucking Pest, Bt Cotton.

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A. P. Barge ¹, G. B. Kabre ¹

Affiliations
1 Department of Agricultural Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri, Ahmednagar (M.S.), IN

Abstract

The present investigation was carried out in the laboratory of Department of Agricultural Entomology, Post Graduate Institute, Mahatma Phule Krishi Vidyapeeth, Rahuri during 2018. Among 8 Chickpea varieties, Minimum (44.3% and 23.00%) pulse beetle grain infestation (number basis and weight basis, respectively) was recorded in a variety Vikrant while the maximum (75.5% and 39.8%) pulse beetle grain infestation (Number basis and weight basis) was recorded in a variety Kripa. Minimum (30.6 %) grain weight loss was recorded in a variety Vikrant and maximum (52.9%) grain weight loss was recorded in a variety Kripa. In Free choice test, the lowest (6.33) average number of adult pulse beetles oriented towards variety Vikrant, while the highest (11.00) adult pulse beetles oriented towards kabuli variety Kripa. In “No choice test” minimum (78.60%) adult emergence was observed in variety Vikrant while the highest (90.39%) adult emergence of pulse beetle was observed in a susceptible variety Kripa. Minimum (27.66 days) development period was observed in variety Vijay while the maximum (29.66 days) development period of pulse beetle was observed in variety Virat. The minimum (2.18) growth index was observed in variety Vikrant and the maximum (2.48) growth index was observed in a variety Kripa.

Keywords

Orientation, Seed Infestation, Seed Weight Loss.

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