Approach to study of pigeonpea leaf webber [Grapholita critica (Meyr.)] damage dynamics and its relation to weather 

DOI: 10.18805/LR-3937    | Article Id: LR-3937 | Page : 844-849
Citation :- Approach to study of pigeonpea leaf webber [Grapholita critica (Meyr.)] damage dynamics and its relation to weather.Legume Research-An International Journal.2019.(42):844-849
S. Vennila, Ranjit Kumar Paul, M.N. Bhat, Satish Kumar Yadav, N.B. Kumar, V. Rachappa, Suhas Yelshetty, Puran Chandra and O.P. Sharma svennila96@gmail.com
Address : ICAR- National Research Centre for Integrated Pest Management, Pusa Campus, New Delhi-110 012, India.
Submitted Date : 2-09-2017
Accepted Date : 14-11-2017

Abstract

Investigation of the published data of a field experiment on assessment of damage due to leaf webber (Grapholita critica (Meyr.)Torticidae:Lepidoptera) under seven different sowing periods at weekly intervals between June IV to August II weeks of 2013-14 at Gulbarga (Karnataka)  and observations  on leaf webber damage recorded on weekly basis between 32 and 42 standard meteorological weeks (SMW) was done to demonstrate  appropriate analytical methodology for an improved understanding of seasonal dynamics of  G. critica damage and its relation to weather. Approach to analyses included reporting of calendar (SMW) based observations of G. critica damage on crop age basis, one way ANOVA for testing differences in damage levels amongst sowing periods, SMWs and crop age besides description of relations of damage with crop age and weather variables.  Seasonal damage levels of G. critica for sowing periods were non-significant but significant (P<0.05) across SMWs and crop age with reduced damage during early and late crop stages irrespective of sowing periods. Seven and four weeks of higher damage and  the best fit of polynomial relations of second order in respect of crop age over calendar based periods signified crop stage dependent damage due to G. critica. While MLR revealed significant influence of all weather and crop age variables (R2: 0.79), non-parametric regression revealed that less than 30°C of maximum temperature and greater than 23°C of minimum temperature to be favourable for G. critica damage. Crop age and calendar based observations have their importance for an area wide and field basis management of G. critica respectively.

Keywords

Crop age Damage dynamics Leaf webber Pigeonpea Weather.

References

  1. Akhilesh Kumar and P Nath.(2003). Pest complex and their population dynamics on an early variety of pigeonpea UPAS-    120 at Varanasi. Indian Journal of Entomology, 65:453-460.
  2. Gayatree Sahoo and Sahoo, B. K.( 2016). Assessment of damage by different pod borer species in pigeonpea under coastal Odisha conditions.Journalof Applied Zoological Researches, 27: 113-116.
  3. Kumar, N. B., Suhas Yelshetty., Rachappa, V., Naganagoud, Aand . Yadav P. R.(2014a). Nature of damage and biology of leaf webber, Grapholita critica (Meyr.) (Lepidoptera: Tortricidae) on pigeonpea. Journal of Experimental Zoology,17:193-195.
  4. Kumar, N. B., Suhas Yelshetty., Rachappa, V., Yadav P. R.. (2014c). Assessment of incidence of pigeonpea leaf webber, Grapholita critica (Meyr.) in relation to weather parameters. Journal of Experimental Zoology,17: 273-275.
  5. Kumar, N. B., Suhas Yelshetty., Rachappa, V., Naganagoud, A., Pramod Katti., Amaresh, Y. S.,. Yadav P. R. (2014b). Assessment of crop loss due to leaf webber, Grapholita critica Meyr. in pigeonpea. Journal of Experimental Zoology,17: 235-236.
  6. Latee S F and Reed W. 1983. Review of crop losses caused by insect pests in pigeonpea internationally and in India. Indian Journal of Entomology,2:284-293.
  7. Narendra C., Singh Y and Singh V. S. (1998). Pest complex and their succession on pigeonpea variety p-33. Indian journal of Entomology,60: 334-338.
  8. Sahoo B K and Senpati B. (2000). Relative abundance of pod borer species in different pigeon pea maturing varieties in coastal belt of Orissa. Indian Journal of Plant Protection, 28: 192-194.
  9. Sahoo, B. K., Sahoo, G., Singh, N. K., Mohanta, P., Sahani, P., Nayak, U. K., Anwer, M. A., Saha, T., Durga Prasad., Arvind Kumar., Reyaz Ahmad., Sah, S. B., Anil Kumar., Singh, R. G. (2014). Emerging pests of pulse and oilseed crops in Eastern India.Journal of Applied Zoological Researches, 25: 177-178.
  10. Sinam S and Sing T K. (2004). Insect pest complex of pigeonpea in agro-ecosystems of Manipur. Indian Journal of Entomology, 66: 222-224.
  11. Singh, R. S., Chakravorty, S., Chandra Mani.(2013). Diversity of pod associated insect pests and natural enemies in pigeon pea, their relative abundance and crop losses in Bundelkhand region, (U.P.) India. Flora and Fauna (Jhansi),19: 294-302.

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