Chi-Square Analysis to Test the Dependency for Head Angle and Bird Damage in Sunflower (Helianthus annuus L)

Ten accessions of sunflower were evaluated for achene yield and its related traits. The experiment was laid out following a randomized complete block design with three replications Chi-square analysis was carried to test the dependency for head angle and bird damage. Head angle had a statistically significant effect on bird feeding the sunflower and this trend was for greater bird damage with larger head angles. The results indicated that bird damage and head angle is correlated to each other. Head angle of most of the damaged heads of studied accessions were 180⁰. It was observed that the accessions having more percentage of damage (G-43, G-41 and G-45) had more number of plants with head angle 135⁰ and 180⁰ as compared to other accessions under observation rather than the upright angles of 45⁰ or 90⁰.

Author(s): Hina Saleem1*, Muhammad Hammad Nadeem Tahir2 and Humera Razzaq1

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