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Title

SPATIAL DISTRIBUTION PATTERN OF IMMATURE STAGES OF ALFALFA SEED WEEVIL, TYCHIUS AUREOLUS (KEISWETTER) (COL.CURCULIONIDAE), AND ALFALFA SEED WASP, BROCHOPHAGUS RODDI, (HYM. EURYTOMIDAE) (GUSSAKOVSKI) IN ALFALFA SEED FIELDS

Author(s)

 ARBAB A. | Issue Writer Certificate 

Pages

  263-269

Abstract

 Alfalfa seed pests, such as alfalfa seed wasp, Brochophagus roddi (Hym.Eurytomidae) and ALFALFA SEED WEEVIL, Tychius aureolus (Col.Curculionidae), cause high reduction in alfalfa seed production, but no sampling program for population estimate and management of them has been developed. During two years (2001& 2002), the SPATIAL DISTRIBUTION of immature stages of these insects was determined using the crowding indices (ID,Cx, X*, Id & 1/k), Taylor's power law and Iwao's regression technique. All indices indicated an aggregated distribution of two insects in lucerne seed fields. Compared with Iwao's regression, Taylor's power law provided a better description between variance and mean density.The coefficient of Taylor's power law for alfalfa seed wasp and ALFALFA SEED WEEVIL were (a= 0.5, b= 1.02 ± 0.06, r2 = 0.95) and (a= 0.275, b= 1.06±0.05 r2= 0.82) respectively and these for Iwao's regression were (a =0.08, b = 2.95±0.06 r2= 0.5) and (a =0.09, b =1.07±0.14 r2= 0.29) respectively.

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    APA: Copy

    ARBAB, A.. (2006). SPATIAL DISTRIBUTION PATTERN OF IMMATURE STAGES OF ALFALFA SEED WEEVIL, TYCHIUS AUREOLUS (KEISWETTER) (COL.CURCULIONIDAE), AND ALFALFA SEED WASP, BROCHOPHAGUS RODDI, (HYM. EURYTOMIDAE) (GUSSAKOVSKI) IN ALFALFA SEED FIELDS. JOURNAL OF AGRICULTURAL SCIENCES, 12(2), 263-269. SID. https://sid.ir/paper/7872/en

    Vancouver: Copy

    ARBAB A.. SPATIAL DISTRIBUTION PATTERN OF IMMATURE STAGES OF ALFALFA SEED WEEVIL, TYCHIUS AUREOLUS (KEISWETTER) (COL.CURCULIONIDAE), AND ALFALFA SEED WASP, BROCHOPHAGUS RODDI, (HYM. EURYTOMIDAE) (GUSSAKOVSKI) IN ALFALFA SEED FIELDS. JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2006;12(2):263-269. Available from: https://sid.ir/paper/7872/en

    IEEE: Copy

    A. ARBAB, “SPATIAL DISTRIBUTION PATTERN OF IMMATURE STAGES OF ALFALFA SEED WEEVIL, TYCHIUS AUREOLUS (KEISWETTER) (COL.CURCULIONIDAE), AND ALFALFA SEED WASP, BROCHOPHAGUS RODDI, (HYM. EURYTOMIDAE) (GUSSAKOVSKI) IN ALFALFA SEED FIELDS,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 12, no. 2, pp. 263–269, 2006, [Online]. Available: https://sid.ir/paper/7872/en

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