文章基本信息

标题：Impact of Weather Factors on Population Fluctuation of H . armigera on Sunflower
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作者：Khalid Zafar ; Anjum Suhail ; M. Arshad 等
期刊名称：Pakistan Journal of Nutrition
印刷版ISSN：1680-5194
电子版ISSN：1994-7984
出版年度：2013
卷号：12
期号：1
页码：50-54
DOI：10.3923/pjn.2013.50.54
出版社：Asian Network for Scientific Information
摘要：Studies were conducted to ascertain the effect of the weather factors on incidence and development of H . armigera on different sunflower genotypes during 2008-2009. The H . armigera population was built up progressively from April 12 to April 27 in terms of egg count. The larval population started to increase continuously from April 12 to May 01 and a tremendous decrease was observed thereafter. The results reveal that maximum temperature during 2009 showed significant and positive correlation r-value of 0.514** with the egg counts of H. armigera . Whereas, on cumulative basis relative humidity and rainfall had negative and significant correlation with the eggs count with r-values of -0.525** and -0.479*, respectively. It is evident that a maximum larval population was recorded to be 5.64 per 5 plants on April 24, 2009. The determination of the effects of different weather factors on egg count and larval population of H . armigera in sunflower is essential for effective management of this pest.