Asian Journal of Bio Science

Arun Kumar Singh ¹, M. N. Lal ¹

Affiliations
1 Department of Entomology, N.D. University of Agriculture and Technology, Kumarganj, Faizabad (U.P.), IN

Abstract

The effect of seven different botanical leaves, neem leaf extract (Azadirachta indica), Congress grass leaf extract (Parthenium hysterophorus) Lemmon grass leaf extract (Cymbopogon citrates), Bhang leaf extract (Cymbopogon citrates), Garlic leaf extract (Allium sativum), Punch phuli leaf extract (Lantana camera) and Marigold Leaf extract (Tagetes erecta) on mustard aphid was assessed in field at Student's Instructional Farm of Narendra Deva University of Agriculture and Technology, Narendra Nagar (Kumarganj), Faizabad (U.P.). The dead aphids were counted on tagged plants on 10 cm terminal shoot from 10 randomly selected plant par plot. The botanical extracts showed varying effect on aphid population and neem leaf extract (T₁) inflicted consistently the maximum level of aphid mortality (77.33% and 71.76%) followed by Punch phuli leaf extract (74.35% and 70.96%) and Garlic leaf extract (73.19% and 62.17%) during seventh day after spray in both year 2009-2010 and 2010-2011. All the treatments of plant leaf extracts showed insecticidal activity, but Indian neem leaf extract followed by Punch phuli leaf extract and Garlic leaf extract reduced the aphid population to a great extent.

Keywords

Mustard Aphid, Botanical Leaves Extract, Yellow Sarson.

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Arun Kumar Singh ¹, M. N. Lal ¹

Affiliations
1 Department of Entomology, N.D. University of Agriculture and Technology, Kumarganj, Faizabad (U.P.), IN

Abstract

The population dynamics of mustard aphid, Lipaphis erysimi (Kalt.) on mustard in relation to weather parameters was studied at Students' Instructional Farm of Narendra Deva University of Agriculture and Technology, Narendra Nagar (Kumarganj), Faizabad (U.P.) during the Rabi 2009-2010 and 2010-2011 crop season. This study will provide an opportunity to face the pest challenge by manipulating the manageable ecological parameters in the form of planting or harvesting time adjustment, varietal selection, correct time of pesticide application, etc. The natural appearance of mustard aphid population was started from 2^nd week of January during the both year and reached its peak in 8^th standard week with 219.07/10cm terminal shoot and 199.10/10cm terminal shoot during 2009-2010 and 2010-2011. Studies indicated that mustard aphid incidence was higher when maximum and minimum temperature ranged between 9.30 to 25.90°C and 8.20 to 25.20°C, relative humidity during hours 64.75 and 67.6 per cent, rainfall 0.4 and 1.4 mm and sunshine hours 7.50 and 7.20 during 2009-2010 and 2010-2011, respectively. Mustard aphid population was build up showed a non significant positive correlation with maximum temperature (°C), humidity, rainfall, sunshine and non-significant negative correlation with minimum temperature during both the year.

Keywords

Lipaphis erysimi, Seasonal Incidence, Population Fluctuations, Correlation.

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