Yield loss estimation in safflower due to aphid, Uroleucon compositae (Theobald)
Keywords:
Aphid, Loss estimation, Safflower, Seed yieldAbstract
The field experiment, conducted with five safflower varieties during rabi 2015-16 under protected and unprotected conditions, revealed that the variety A-1, showing greater degree of tolerance/ resistance to aphids, recording the least number of aphids per plant (83.20 aphids 5 cm apical twig-1) followed by A-300 (86.35 aphids 5 cm apical twig-1) and A-2 (92.20 aphids 5 cm apical twig-1), recorded the highest yield of 10.8 q ha-1, 10.41 q ha-1, 9.33 q ha-1, respectively). Whereas, PBNS-12 and non-spiny Nari-6, the most susceptible ones, recording maximum number of aphids (103.45 and 119.50 aphids 5 cm apical twig-1, respectively). yielded the lowest of 8.81 q ha-1 and 8.52 q ha-1, respectively under protected condition. The yield under unprotected condition was highest in A-1 (7.73 q ha-1) followed by A-300 (7.14 q ha-1) and A-2 (6.96 q ha-1), lowest in PBNS-12 (6.56 q ha-1) and Nari-6 (6.224 q ha-1). Per cent losses in unprotected over protected condition were highest in variety A-300 (45.80%) followed by A-1 (39.72%), Nari-6 (36.54%), PBNS-12 (34.30%) and A-2 (34.05%). The loss in yield due to safflower aphid alone ranged from 34.05 to 45.80 per cent across varieties.
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References
Akashe, V. B., Pisal, A. A., Mehtre, S. P. and Sawant, P. H., 1999, Insect pest scenario of safflower in drought prone areas of Maharashtra (India). Journal of Maharashtra Agricultural Universities, 14: 103-108.
Anonymous, 2007, AICRP (Safflower) Annual Report 2007, Directorate of Oilseeds Research. (DOR), Hyderabad, p. 165.
Balikai, R. A., 1999, Evaluation of some aphid tolerant safflower germplasm lines for their productivity levels. Agricultural Science Digest, 19: 119-121.
Bindra, O. S. and Vaishampayana, S.M., 1965, Studies on the chemical control of safflower aphid (Dactynotus compositae Theobald). Indian Oilseeds Journal, 9: 113-118.
Bhumannavar, B. S., 1976, Studies on the bionomics of the safflower aphid, Dactynotus compositae (Theobald), its role in safflower crop loss and its control. M. Sc. (Agri.) Thesis, University of Agricultural Sciences, Bengaluru, Karnataka (India)
Painkara, G. P., Yadu, Y. K. and Dubey, V. K., 2003, Losses to safflower yield caused by the aphid (Dactynotus carthami). Insect Environment, 9: 88-89.
Sastry, K., 1997, Managing pests of safflower: New Paradigm. The Proceedings of IV International Safflower Conference, Bari (Italy), 2-7th June, 1997, pp. 285-291.
Shetgar, S. S., Bilapate, G. G., Puri, S. N., Patil, V. M. and Londhe, G. M., 1992, Assessment of yield loss in safflower due to aphids. Journal of Maharashtra Agricultural Universities, 17: 303-304.
Singh, V., Shing, H., Hegde, D. M., Ghorpade, S. A. and Men, U. B., 2000, Insect pests of safflower and their management. Journal of Applied Zoological Research, 2: 196-213.
