Update on new management tools for the rice water weevil
2002
Way, M.O. | Wallace, R.G.
In 1997 and 1998, granular carbofuran use for rice water weevil RWW) management in Texas was increasingly restricted and was completely banned in 1999. Lambda-cyhalothrin (Karate) received a United States Environmental Protection Agency (USEPA) registration in the summer of 1997 and was used on a significant area in Texas in 1998 for RWW, chinch bug [Blissus leucopterus leucopterus (Say)], and fall armyworm [Spodoptera frugiperda (J.E. Smith)] control. Fipronil (Icon 6.2FS) received a USEPA registration as a seed treatment for RWW control in the late summer of 1998. Diflubenzuron (Dimilin 2L) received a USEPA registration in the spring of 1999. Results from several years showed that Karate 1EC or Karate Z applied at 0.034 kg ai ha¯¹ early postpermanent flood provided RWW control similar to granular carbofuran. Results in 1997 and 1998 showed that Karate 1EC or Karate Z applied prepermanent flood provided control of RWW comparable to postpermanent flood applications. Results from several years also showed that Icon 6.2FS applied at 0.035 to 0.056 kg ai ha¯¹ as a seed treatment control led to RWW comparable to granular carbofuran.
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