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volume 36 issue 2 (june 2002) : 133" 136

DIS1RIBUTION PATIERN OF CITRUS BlACKFLY (ALEUROCANFHUS WOGLUM!ASHBY) INFESTING MANDARIN ORANGE IN DARJEELING DISTRICT OF WESTBENGAL

H
Hirak Chatterjee
1Department of Agricu1tural Entomology, U~r Banga Krishi Vlsh~vidyalaya, Pundibari, Coochbehar - 736i65, India

  • Submitted|

  • First Online |

  • doi

Cite article:- Chatterjee Hirak (2025). DIS1RIBUTION PATIERN OF CITRUS BlACKFLY (ALEUROCANFHUS WOGLUM!ASHBY) INFESTING MANDARIN ORANGE IN DARJEELING DISTRICT OF WESTBENGAL. Indian Journal of Agricultural Research. 36(2): 133" 136. doi: .

ABSTRACT

Distribution pattern of citrus blackfly (Aleurocanthus woglumi Ashby) was studied on mandarin orange (Citrus reticulala Blanco) at Darjeeling district of West Bengal during 1997–1998. Different indices of dispersion i.e variance mean ratio, dispersion Parameter ‘K’, David and Moore's index, Charlier coefficient and Lioyd patchiness index showed aggregative, clumped and contagious nature of distribution of citrus blackfly adult in all the successive flushes viz., Ambia (spring) Mrig(summer) and Hasta (autumn) flushes during a year. However, calculated ‘K’ values of most of the standard weeks observed to be slightly deviated from the negative binomial aggregative type of distribution.

KEYWORDS

    REFERENCES

    1. Anonymous, (1995). Research Report ofAUIndia Co-ordinated Research Project (TropiCaJ Froits)IIHR, Hessaraghata, Bangolore Tech. DOC No:57. .
    2. BasU. A.C., Nath, DK and Chatterjee, P.B. (1969). Pro. Zoo/. Soc. Calcutta 22: 169-178.
    3. Chatterjee. H., Ghosh, J. and Senapatl, SK (2000). J. Ent. Res., 24(3): 229-233.
    4. Elliott. J.M.. (1979). Some methods for statistical analysis of samples of benthic Invertebrates. Scientific Publication Fresh water Biological Association, 25: 156 p.
    5. lwao; (1970). Japanese Rev., 3: 41-54.
    6. Konar, A. and Ghosh. M.R. (1990). Enviropment and Ecology 8(1) :11-18.
    7. Uyod, M. (1967). J. Anim. Ecology 36:130.
    8. Pnrthi, H.S. and Mani, M.S. (1945).&i. MOrii:Jgr. Coun. Agric. Res. India. 16:43 p.
    9. Rathore, Y.S. and Tiwari, S.N. (1999). Bio. Control, 13:121-124.
    10. Southwood, T.R.G.(1978). Ecological methods with particular ref~ to the stut!yofinsectpopu/ation. The English language book Society. Champman and Hall, London. 524p.
    11. Taylor, R.L. (1984). Rev. Ent., 29:321:327.
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    Indian Journal of Agricultural Research
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      volume 36 issue 2 (june 2002) : 133" 136

      DIS1RIBUTION PATIERN OF CITRUS BlACKFLY (ALEUROCANFHUS WOGLUM!ASHBY) INFESTING MANDARIN ORANGE IN DARJEELING DISTRICT OF WESTBENGAL

      H
      Hirak Chatterjee
      1Department of Agricu1tural Entomology, U~r Banga Krishi Vlsh~vidyalaya, Pundibari, Coochbehar - 736i65, India

      • Submitted|

      • First Online |

      • doi

      Cite article:- Chatterjee Hirak (2025). DIS1RIBUTION PATIERN OF CITRUS BlACKFLY (ALEUROCANFHUS WOGLUM!ASHBY) INFESTING MANDARIN ORANGE IN DARJEELING DISTRICT OF WESTBENGAL. Indian Journal of Agricultural Research. 36(2): 133" 136. doi: .

      ABSTRACT

      Distribution pattern of citrus blackfly (Aleurocanthus woglumi Ashby) was studied on mandarin orange (Citrus reticulala Blanco) at Darjeeling district of West Bengal during 1997–1998. Different indices of dispersion i.e variance mean ratio, dispersion Parameter ‘K’, David and Moore's index, Charlier coefficient and Lioyd patchiness index showed aggregative, clumped and contagious nature of distribution of citrus blackfly adult in all the successive flushes viz., Ambia (spring) Mrig(summer) and Hasta (autumn) flushes during a year. However, calculated ‘K’ values of most of the standard weeks observed to be slightly deviated from the negative binomial aggregative type of distribution.

      KEYWORDS

        REFERENCES

        1. Anonymous, (1995). Research Report ofAUIndia Co-ordinated Research Project (TropiCaJ Froits)IIHR, Hessaraghata, Bangolore Tech. DOC No:57. .
        2. BasU. A.C., Nath, DK and Chatterjee, P.B. (1969). Pro. Zoo/. Soc. Calcutta 22: 169-178.
        3. Chatterjee. H., Ghosh, J. and Senapatl, SK (2000). J. Ent. Res., 24(3): 229-233.
        4. Elliott. J.M.. (1979). Some methods for statistical analysis of samples of benthic Invertebrates. Scientific Publication Fresh water Biological Association, 25: 156 p.
        5. lwao; (1970). Japanese Rev., 3: 41-54.
        6. Konar, A. and Ghosh. M.R. (1990). Enviropment and Ecology 8(1) :11-18.
        7. Uyod, M. (1967). J. Anim. Ecology 36:130.
        8. Pnrthi, H.S. and Mani, M.S. (1945).&i. MOrii:Jgr. Coun. Agric. Res. India. 16:43 p.
        9. Rathore, Y.S. and Tiwari, S.N. (1999). Bio. Control, 13:121-124.
        10. Southwood, T.R.G.(1978). Ecological methods with particular ref~ to the stut!yofinsectpopu/ation. The English language book Society. Champman and Hall, London. 524p.
        11. Taylor, R.L. (1984). Rev. Ent., 29:321:327.
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