Studies on insect pest complex of brinjal solanum melongene (Linn.) and their control with insecticides and biopesticides
| dc.contributor.advisor | Saxena, A.K. | |
| dc.contributor.author | Patel, Satyendra | |
| dc.date.accessioned | 2016-07-15T12:09:57Z | |
| dc.date.available | 2016-07-15T12:09:57Z | |
| dc.date.issued | 2014 | |
| dc.description.abstract | ABSTRACT Present research work on “Studies on insect pest complex of brinjal, Solanum melongena (Linn.) and their control” was carried out in the experimental fields of Department Of Entomology, Live Stock Farm, Adhartal JNKVV, Jabalpur (M.P.) during rabi season 2012-13. The experiment was conducted with the following objectives : 1. To study the succession of insect complex on brinjal 2. To study the population dynamics of major insects of brinjal 3. Control : (a) To study the efficacy of insecticides against major insect pest complex of brinjal (b) To study the efficacy of biopesticides against major insect pest complex of brinjal 1. Studies on insect pest complex and their natural enemies revealed that the following insect pests were the major pests which were observed infesting the brinjal crop. Jassid, Amrasca biguttula biguttula (Ishida) (Hemiptera: Jassidae); aphid, Aphis gossypii (Glover) (Hemiptera: Aphididae); whitefly, Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae), thrips, Thrips tabaci (Lederman) (Thysonoptera: Thripidae) and shoot and fruit borer, Leucinodes orbonalis (Guen.) (Lepidoptera : Pyraustidae) as major pests infesting brinjal crop and one natural enemy lady bird beetle Menochilus sexmaculatus (Fabricius) (Coleoptera: Coccinellidae). Among them, jassid, aphid, thrips whitefly were appeared when the crop age was about 26 days old i.e. during vegetative stage among them jassid and whitefly remained active upto maturity stage of the crop and aphid and thrips remained active upto fruiting stage of the crop. and was the next natural enemy lady bird beetle, Menochilus sexmaculatus (Fabricius) were appeared when crop age was about 53 days old i.e. during vegetative stage and remained active upto maturity stage of the crop. Shoot and fruit borer appeared when the crop age was about 118 days old i.e.during reproductive stage of the crop and remained active up to maturity of the crop. The incidence of shoot and fruit borer not observed on shoot at vegetative stage. Jassids was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012) and active upto last week of April.The peak activity of the pest was observed during 16th to 21st SW (i.e. mid week of April to last week of May). The peak activity of the pest was observed (4.27 jassid/6 leaves) during 12th SW (19-03-2013 to 25-03-2013). During this period maximum and minimum temperature was 33.4. and 16.20C respectively, whereas morning and evening relative humidity was 77.0 and 28.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 8.2 hrs, 3.6 km/hr, 12.6 mm, 10.6 mm and 4.5 mm respectively .There was no rainfall during this week. Correlation studies between various abiotic factors and jassid population revealed that morning and evening relative humidity, showed significant positive correlation. Aphid was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012). In the present study the activity of the pest continued from 2nd week of Deceber to last week March. The peak activity of the pest was observed during 9th SW (Last week of February to First week of March). During this period maximum and minimum temperature was 280c and 9.20C respectively, whereas morning and evening relative humidity was 87.0 and 37.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 9.8 hrs, 3.1 km/hr, 9.3 mm, 10.6 mm and 3.6 mm respectively. Correlation studies between various abiotic factors and aphid population revealed that morning and evening relative humidity and evening vapour pressure showed significant positive correlation. White fly was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012). In the present study the activity of the pest continued from 2nd week of Deceber to last week of April. The peak activity of the pest was observed during 10th SW (first week of March to 2nd week of march). During this period the maximum and minimum temperature was 30.7 and 9.9 00C respectively, whereas morning and evening relative humidity was 83.0 and 28.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 9.6 hrs, 2.6 km/hr, 9.0 mm, 9.2 mm and 4.1 mm respectively. There was 0.00 mm rainfall during this week and no rainy days. Correlation studies between various abiotic factors and whitefly population revealed that that morning and evening relative humidity and evening vapour pressure showed significant positive correlation with whitefly population. Thrips was first recorded in 10th December 2012 i.e. during the 50th SW (10-11-2012 to 16-11-2012). In the present study the activity of the pest continued from 2nd week of Deceber to last week of March. The peak activity of the pest was observed during 7th SW (2nd week of february to 3rd week of February). During this period maximum and minimum temperature was 25.2 and 13.00C respectively, whereas morning and evening relative humidity was 91.0 and 60.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 4.1 hrs, 4.4 km/hr, 11.5 mm, 12.7 mm and 3.1 mm respectively. There was 55.4 mm rainfall during this week and 3 rainy days. Correlation studies between various abiotic factors and whitefly population revealed that Correlation studies revealed that rainfall showed significant positive correlation with thrips population. During the entire period of study the shoot damage due to shoot and fruit borer was not observed. Fruit infestation due to shoot and fruit borer was first recorded in the first week of April i.e. 12th March (11th SW). In the present study the activity of the pest continued from 2nd week of March to last week of April i.e. from reproductive to maturity stage. The peak activity of the pest was observed during in the 16th SW (3rd week of April to 4th week of April). During this period maximum and minimum temperature was 36.50 and 20.100C, respectively, whereas morning and evening relative humidity were 51 and 22 percent, respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 8.6 hrs, 5.2 km/hr., 11.3 mm, 8.8 mm and 6.9 mm, respectively. There was rainfall 10.60 mm and 1.0 rainy day during this week. Correlation studies between various abiotic factors and whitefly population revealed that minimum temperature and sunshine hrs. showed significant positive correlation. Lady bird beetle was first recorded in 8th January 2013 i.e. during the 2th (SW). In the present study the activity of the pest continued from 2nd week of January to last week April. The peak activity of the pest was observed during 12th SW (19-03-2013 to 25-03-2013). During this period maximum and minimum temperatures were 33.4 and 16.20C respectively, whereas morning and evening relative humidity were 66.0 and 30.0 percent respectively. Further sunshine, wind speed, morning and evening vapour pressure and evaporation were 8.2 hrs, 3.6 km/hr, 9.1, 12.6 and 10.6 mm respectively. There was no rainfall during this week. Correlation studies revealed that maximum and minimum temperature, wind speed, sunshine, rainfall, rainy days, morning vapour pressure, evening vapour pressure and evaporation exhibited positive correlation with beetle (grub and adult) per plant but statistically found to be non significant. Further, morning and evening relative humidity exhibited negative correlation with beetle (grub and adult) per plant, but statistically found to be non significant. On the basis of the efficacy of different insecticidal treatments against pest complex, Emamectin benzoate @ 10 g.a.i/ha was found to be most effective as it recorded lowest infestation, of all the recorded pests followed by Pyriproxifen + fenpropethrin 500 ml/ha Highest fruit yield was registered in Emamectin Benzoate @10 g.a.i/ha (120.66 q / ha), followed by Pyriproxifen + fenpropethrin 500 ml/ha (115.47 q / ha) as compared to control (60.07 q / ha). On the basis of the efficacy of different biopesticides treatments Passilomyces fumosoresus @ 1l/ha was found to be the most effective as it recorded lowest infestation, of all recorded pests followed by Beauveria bassiana @ 1l/ha. Highest fruit yield was registered in Passilomyces fumosoresus @ 1l/ha (85.06 q / ha), followed by Beauveria bassiana @ 1l/ha (80.05/ ha). | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/68805 | |
| dc.language.iso | en | en_US |
| dc.publisher | JNKVV | en_US |
| dc.sub | Entomology | |
| dc.subject | fruits, vegetables, insecticides, crops, pesticides, fungi, biological interaction, relative humidity, yields, land resources | en_US |
| dc.these.type | M.Sc | |
| dc.title | Studies on insect pest complex of brinjal solanum melongene (Linn.) and their control with insecticides and biopesticides | en_US |
| dc.type | Thesis | en_US |