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ARS Home » Research » Publications at this Location » Publication #107607
Title: IMPACT OF FERTILIZATION RATE ON RICE RESISTANCE AND TOLERANCE TO THE RICE WATER WEEVIL: A PRELIMINARY REPORT

Author
item STOUT, M - LSU RRS
item Rice, William
item RIGGIO, M - LSR RRS
item BOLLICH, P - LSU RRS

Submitted to: Experiment Station Bulletins
Publication Type: Experiment Station
Publication Acceptance Date: 11/1/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: An experiment was performed in the 1998 growing season to address the following questions: a) how does fertilization rate in rice influence populations of RWW adults and larvae, and b) what effect does post-damage fertilizer applications have on rice yields? Densities of RWW adults were not affected by rate of fertilization but were affected by application of insecticide. Both the rate of fertilization and insecticide treatment impacted densities of RWW larvae. As expected larval numbers were dramatically reduced in insecticide treated plots. Larval densities were lowest in low-N plots, intermediate in medium-N plots and highest in high-N plots. A positive relationship was seen between rate of fertilization and yield. Excluding RWW larvae also gave a positive impact on yield.