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Rahman, S.
- Incidence and Population Builds up of P. lotus Infesting Capsicum chinense Jacq. in Relation to Weather Factors
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1 Department of Entomology, Assam Agricultural University, Jorhat (Assam), IN
2 Krishi Vigyan Kendra, South Tripura (Tripura), IN
1 Department of Entomology, Assam Agricultural University, Jorhat (Assam), IN
2 Krishi Vigyan Kendra, South Tripura (Tripura), IN
Source
International Journal of Plant Protection, Vol 9, No 2 (2016), Pagination: 578-582Abstract
An Experiment was conducted in the experimental plot, Department of Entomology, Assam Agricultural University, Jorhat during 2014 and 2015 to study the population build up of P. lotus infesting Capsicum chinense with respect to weather factors. In the present investigation, the highest population (no/leaf) of yellow mite, P. latus was observed in the month of March with maximum 45 and 28 number of yellow mite per leaf in 2014 and 2015, respectively. The highest overall per cent incidence recorded was 80.61 in the last week of March whereas lowest overall incidence was found in May with 20.12 per cent mite incidence The correlation studies between P. latus and weather parameters revealed that population build up of P. latus found to be significant negative correlation with morning relative humidity (r=-0.787 and r=-721) and rainfall (r=-0.526) in both the years, respectively. Maximum temperature, minimum temperature and evening relative humidity showed a negative and non- significant correlation with mite population. Bright sunshine hour was found to be positively correlated. This present findings will certainly be a helpful for yellow mite forecasting as well as management point of view and to have profitable cultivation of Capsicum chinense by way of mite free crop production.Keywords
Capsicum chinense, Yellow Mite, Population, Weather Parameters, Correlation.
References
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- Singh, A.P. and Singh, R.N. (2012). Effect of abiotic factors on the population dynamics of yellow mite, Polyphagotarsonemus latus (Banks) on chilli crop in Varanasi. J. Insect Sci., 25(3): 237-240.
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- Influence of Weather Factors on Insect and Mite Pests Infesting French Bean (Phaseolus vulgaris L.), Assam, India
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Authors
Affiliations
1 Krishi Vigyan Kendra (ICAR), South Tripura (Tripura), IN
2 Department of Entomology, Assam Agricultural University, Jorhat (Assam), IN
3 Department of Plant Pathology, Assam Agricultural University, Jorhat (Assam), IN
4 Department of Horticulture, Assam Agricultural University, Jorhat (Assam), IN
1 Krishi Vigyan Kendra (ICAR), South Tripura (Tripura), IN
2 Department of Entomology, Assam Agricultural University, Jorhat (Assam), IN
3 Department of Plant Pathology, Assam Agricultural University, Jorhat (Assam), IN
4 Department of Horticulture, Assam Agricultural University, Jorhat (Assam), IN
Source
International Journal of Plant Protection, Vol 10, No 1 (2017), Pagination: 157-166Abstract
A field experiment was carried out in the Integrated Crop Research (ICR) farm, Assam Agricultural University, Jorhat to determine the impact of weather parameters on insect and mite pests infesting French bean (Phaseolus vulgaris L.) during 2013-14 and 2014-15. The weather parameters had a significant impact on population build up of various French bean crop pests. Cutworm population found to be positive and significant correlation with morning relative humidity (r=0.573) during 2014-15 while aphid showed a positive significant correlation with maximum temperature (r=0.555) and BSSH (r=0.671) but negative with relative humidity (r=-0.562*) in 2013-14. Two spotted spider mite (TSSM) population showed a positive significant correlation with morning relative humidity (r = 0.661* and r=0.617*) in both the years and negative correlation with maximum temperature (r=0.603 and r=559) in 2013-14 and 2014-15, respectively. A negative significant correlation with maximum temperature (r=706) and positive correlation with relative humidity (r=568) with pod borer population during 2013-14. The rain fall (r=589) had a negative significant correlation with Thrips population during 2013-14. Whitefly population found to be negative significant correlation with maximum temperature (r=554 and r=553) and positive correlation with morning relative humidity (r=605 and r=674) in 2013-14 and 2014-15, respectively. This present findings will certainly be a helpful tool for profitable cultivation of French bean crop by forecasting insect and mite pests arrival as well as management point of view.Keywords
French Bean, Insect, Mite Pests, Infestation, Weather Parameters, Correlation.References
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- Screening of Certain Chilli Germplasm against Yellow Mite, Polyphagotarsonemus latus (Banks)
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Authors
Affiliations
1 Department of Entomology, Assam Agricultural University, Jorhat (Assam), IN
1 Department of Entomology, Assam Agricultural University, Jorhat (Assam), IN
Source
International Journal of Plant Protection, Vol 10, No 2 (2017), Pagination: 320-323Abstract
An experiment was conducted during the year 2012 and 2013 to screen out 30 chilli germplasm against yellow mite, Polyphagotarsonemus latus (Banks). Out of 30 chill germplasms, 7 germplasmsviz., 13/09, 10/09, 7/09, CH/09/8A3, 11/CHIVAR-6, 10/CHIVAR-6, 10/CHIVAR-3 were found to be resistant as they were found free of mite infestation and leaf curl symptoms. Entries LCA-334, ASC-06-1, KA-2, BH10/04, VR-338, CHIVAR-5, CHIVAR-7, 11/CHIVAR-7, G-8B, G-5B, G-3, G-1, 17/09, 5/A/09, BH10/04 and Mem jolokia were found to be moderately resistant with a damage score of 0.2 to 1.4 showing about 25 per cent leaf curling. The entries 15/02, G-2 and CHIVAR-4 showed a damage score of 2.4, 2.7 and 2.29 and per cent leaf curling of 44.23, 46.53 and 29.28, respectively and were recorded as moderately susceptible. Whereas 11/CHIVAR-1 recorded the highest damage with damage score 3.6, showing 90.48 per cent leaf curling followed by Bhut jolokia and Pusa Juwala which were found to be highly susceptible showing around 82.2 to 89.7 per cent leaf curling with damage score 3.5 and 3.4, respectively.Keywords
Screening, Polyphagotarsonemus latus, Chilli Germplasm.References
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- Economically Important Dipteran Species Biodiversity in South Tripura District of Tripura
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Authors
Affiliations
1 Krishi Vigyan Kendra (ICAR), South Tripura (Tripura), IN
2 Krishi Vigyan Kendra, Baksa (Assam), IN
3 Assam Agricultural University, Jorhat (Assam), IN
1 Krishi Vigyan Kendra (ICAR), South Tripura (Tripura), IN
2 Krishi Vigyan Kendra, Baksa (Assam), IN
3 Assam Agricultural University, Jorhat (Assam), IN
Source
International Journal of Plant Protection, Vol 13, No 1 (2020), Pagination: 71-75Abstract
The present two years experimental survey was carried out for assessment of distribution pattern and diversity of different dipteran insects species in the South Tripura district of Tripura during 2015-16 and 2016-17. The various dipteran insects were collected from different localities of South Tripura district viz., Manumukh, Birchandra Manu, West pillak and Bedantra para. The selected areas for collection were varied from farmland to forest areas with an average elevation of 26 meters. During the study a total of 40 numbers of surveys were made and study reveals that the area under the survey has dipteran insects belonging to 18 families, 28 genera, and 55 species and among the collected 55 numbers of species the ecological roles span are ranges from vertebrate blood feeding to detritivory species.Keywords
Biodiversity, Dipterans, Abundance, Economic Importance, South Tripura.References
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