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Abstract
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Article Information:
Influences of Soil Fertility on Spatial Patterns of Aphis Gossypii Glover (Homoptera: Aphididae) Occurred in Bt-cotton Plants
Zhi-Qiang Tan, Tian-Cheng Ai, Xiao-Zhen Lu, Qing-Nian Cai and Cong Liu
Corresponding Author: Tian-Cheng Ai
Submitted: September 11, 2012
Accepted: October 19, 2012
Published: December 20, 2012 |
Abstract:
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With the widespread planting of bacterium Bacillus thuringiensis (Bt)-cotton, non-target piercing-sucking
insects such as Aphis gossypii Glover (Homoptera: Aphididae) have become the main hazard of cotton. Fertilization
influences the distribution and population dynamics of aphid seriously. In this study, the effects of Nitrogen (N) and
Phosphorus (P) on aphid population density were investigated on Bt-cotton; the combinational impacts of nitrogen
and potassium (K) fertilizers on the distribution of aphid were examined as to guide rational fertilization to reduce
pests and environmental pollution. Aphid density in cotton plants fertilized with 72 kg/ha N (84.2±22.7
aphids/plant) was significantly higher than fertilized with 0 and 108 kg/ha N (36.7±4.0 and 47.8±18.7 aphids/plant).
Compared to cotton plants treated with 23 and 69 kg/ha P, aphid density was higher (61.67±21.08 aphids/plant) in
cotton plants treated with 46 kg/ha P. Comparison of spatial distribution of aphid population showed that aphid
preferred to suck the sap of bottom fruit branches in cotton plants treated by single K fertilizer and combinational
fertilizers of N and K. Thus, these results suggested that proper application of fertilizers should be beneficial to
controlling phytophagous insects in Bt-cotton production.
Key words: Aphid, bt-cotton, distribution, fertilization, population dynamic, ,
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Cite this Reference:
Zhi-Qiang Tan, Tian-Cheng Ai, Xiao-Zhen Lu, Qing-Nian Cai and Cong Liu, . Influences of Soil Fertility on Spatial Patterns of Aphis Gossypii Glover (Homoptera: Aphididae) Occurred in Bt-cotton Plants. Advance Journal of Food Science and Technology, (6): 377-382.
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ISSN (Online): 2042-4876
ISSN (Print): 2042-4868 |
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