##plugins.themes.bootstrap3.article.main##

Sandeep Kaur Amandeep Kaur Gurpreet Kaur A.K. Dhawan

Abstract

A field study was carried out at Vegetable Research Farm PAU, Ludhiana to determine the economic threshold level for the timely management of cotton jassid Amrasca bigutulla (Ishida) on okra vegetable crop. It was observed that significantly lowest jassid nymphal count per leaf in the pooled data (0.96 nymphs/leaf) were registered in the treatment where spray against jassid were given at 2 nymphs/leaf stage and first injury grade that is curling and yellowing of leaf margin as compared to others spray stages (1.54-1.72 nymphs/leaf) and unsprayed control (1.75 nymphs/leaf) significantly lowest jassid injury grade was also observed when spray stared at 2 nymphs/ leaf (0.58) and second spray stage curling and yellowing of leaf margin (0.65 nymphs/leaf) as against other spray stages (1.13 – 1.60 nymphs/leaf) and unsprayed control (1.63 nymphs/leaf). Maximum plant (110.33-110.44 cm) was also recorded as against other treatment (90.80 – 108.46 cm) and control (90.13cm). Total highest fruit yield (120.40-120.75) quintal /ha was also registered in these two treatments. Economic threshold level estimated for the management of cotton jassid on okra crop will help to develop an ecologically safe pest management practices against this pest.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...

##plugins.themes.bootstrap3.article.details##

##plugins.themes.bootstrap3.article.details##

Keywords

Amrasca bigutulla, Economic threshold level, Confidor, Okra

References
Anonymous, (2015). Package of practice for vegetable crops. Punjab Agricultural University, Ludhiana, p-01.
Babu, R.K and Santharam, G. (2002). Bioefficacy of imidacloprid against leaf hopper, Empoasca kerri on groundnut. Annals of Plant Protection 10 (1): 69-71.
Mahal, M. S, Brar, L. S, Singh, R. and Singh, B. (1994). Influence of varying magnitude of jassid injury on seed yield of okra and economics of its control. Journal of Insect Science 7 (2): 129-132
Preethan, G, Manoharan, T, Kuttalam, S and Stanley, J. (2008). Persistent toxicity of imidacloprid against aphid, Aphis gossypii and leaf hopper, Amrasca bigutulla on cotton. Pesticide Research Journal 20(2): 197-200.
Rahman, A. (2014). Development of management practices against jassid (Amrasca devastans) in okra. Msc (Agri.) thesis.Sher-e-Bangla Agricultural University, Dhaka, Bangladesh.
Wagon, T. A. and Wagon, Z.A.015). Natural enemies associate with jassid on okra crop under natural agro ecosystem. Advances in Life Science and Technology. 34: 117-121
Vennilla, S, Biradar, B.K,Sabesh, M. and Bambawala, O. M. (2007). Know your cotton insect pest jassid. Crop Prot Bull. 2:11.
Citation Format
How to Cite
Kaur, S., Kaur, A., Kaur, G., & Dhawan, A. (2017). Determination of economic threshold level for the timely management of cotton jassid Amrasca bigutulla (Ishida) on okra vegetable crop. Journal of Applied and Natural Science, 9(3), 1429-1433. https://doi.org/10.31018/jans.v9i3.1379
More Citation Formats:
Section
Research Articles