International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Determination of Economic Threshold Level of Whitefly, Dialeuropora decempuncta (Quaintance and Baker) in Mulberry, Morus alba L.

  • Bandyopadhyay, U.K. (Entomology Laborarory, Central Sericultural Research ＆ Training Institute) ;
  • Santhakumar, M.V. (Entomology Laborarory, Central Sericultural Research ＆ Training Institute) ;
  • Saratchandra, B. (UttarBanga Krishi ViswaVidyalaya, Agriculture farm) ;
  • Das, K.K. (Entomology Laborarory, Central Sericultural Research ＆ Training Institute)
  • Published : 2002.06.01
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Abstract

Whitefly, Dialeuropora decempuncta (Quaintance rind Baker) (Homoptera: Aleyrodidae) has attained the major pest status in mulberry, causing 24% crop loss by sucking the leaf juice and manifesting leaf curl, chlorosis and sooty mould desease during monsoon season in West Bengal, India. The assessment of economic threshold revel is an essential component for formulating the management practices. Experiments were carried out by inoculating five different densities of whitefly viz.,10, 20, 30, 40 and 50 adults on covered mulberry plants in glass houses. From the findings, it was observed that irrespective of released density, no crop loss was observed in the initial period. But with the passing of days, the percent crop loss was increased rapidly. The linear relationship between percent crop loss and number of adults released was established to highlight the significance of economic threshold. The statistical analysis in the linear form of equation showed that initial population of 10, 20, 30, 40 and 50 whiteflies/plant causes 3%, 12%, 21%, 30% and 40% crop loss in a period of 28 days which is equivalent to 57 kg, 247 kg, 437 kg, 626 kg and 816 kg leaf/acre. Execution of management practices (spray of 0.01% monocrotophos) are economical to the farmer whenever the loss is above 247 kg/acre, but below which application of control measures is not economical. From this study, it can be inferred that the economic threshold level far whitefly is 20 individuals/plant beyond which a farmer has to take appropriate control measures.

Keywords

References

  1. Bandyopadhyay, U. K and M. V. Santhakumar (2000) Efficacy of some insecticides alone and in combination with neem oil against the whitefly, Dialeuropora decempuncta infesting mulberry. J. Ent. Res. 24, 325-329.
  2. Bandyopadhyay, U. K, M. V. Santhakumar, K K Das and B. Saratchandra (2001) Yield loss in mulberry due to sucking pest whitefly, Dialeuropora decempuncta Quaintance and Baker (Homoptera : Aleyrodidae). Int. J. Indust. Entomol. 2, 75-78.
  3. Bandyopadhyay, U. K, N. K Das and B. Saratchandra (1999) Studies on the use of carbaryl, monocrotophos and quinalphos for control of whitefly Dialeuropora decempuncta Quaintance and Baker on mulberry, Morus alba L. J. Adv. Zool. 20, 100-102.
  4. Butler, N. S., J. S. Kular and H. S. Sukhija (1990) Determination of Economic Threshold Level vis-a-vis fixed spray schedule for the control of Bollworm on upland cotton. J. Insect. Sci. 3, 67-71.
  5. Chiang, H. C. (1993) Ecological consideration in developing recommendation for chemical control of pests, European com borer as a model. PI. Prot. Bull. FAO 21, 30-39.
  6. Choudhury, J. P and S. K Sharma (1982) Feeding behaviour and larval population levels of H. armigera causing economic damage to gram crop. Haryana Agril. Univ. J. Res. 12, 462-466.
  7. Men, U. B. and H. G. Kandalkar (1999) Economic threshold level of sunflower jassid Amrasca biguttula Ishida. J. Appl. Zool. Res. 10, 136-137.
  8. Panse, V. G. and P V. Sukhatme (1967) Statistical methods for Agriculture workers. ICAR. New Delhi, pp. 381.
  9. Reddy, K V. S. and K O. S. Sum (1991) Determination of Economic Injuiry Level of the stem borer, Chilo partellus (Swinhoe) in maize, Zea mays L. Insect Sci. Applic. 12, 269-274.
  10. Sarup, P, V. K Sharma, V. P. S. Panwar, K H. Siddiqui, K K Marwaha and K N. Agarwal (1977) Economic threshold of Chilo partellus (Swinhoe) infesting maize crop. J. Ent. Res. 1,92-99.
  11. Singh, M. (1989) Damage and economic threshold level of thrips Thrips flavus Scharank to apple blossom in Himachal Pradesh. Indian J. Ent. 51, 288-293.
  12. Singh, S. V. and Y. P. Malik (1998) Population dynamics and economic threshold of Lipaphis erysimi on mustard. Indian J. Ent. 60,43-49.
  13. Stern, V. M. (1993) Economic Thresholds; in Annual Review of Entomology. Smith, R. E, T. E. Mittler and C. N. Smith (eds.). pp. 259-280, Annual Reviews Inc., Entomological Society of America, CA.
  14. U. S. National Academy of Sciences (1969) Insect Pest Management and control. V-3. Principles of plant and animal pest control. National Academy of Sciences, Washington.
  15. Yee, W. L., N. C. Toscano, C. C. Chu, T. J. Hennebery and R. L. Nichols (1996) Bemisia argentifolii (Homoptera: Aleyrodidae) Action thresholds and cotton photosynthesis. Environ. Entomol. 25, 1267-1273.