Tables 1 to 6 from:

Poston, D. H., Nandula, V. K., Griffin, R. M., Shaw, D. R., and Smith, M. C. 2007. Weed control alternatives in very early-maturing Mississippi soybean. Online. Crop Management doi:10.1094/CM-2007-0323-02-RS..

Table 1. Monthly precipitation in 2000 and 2001 in Stoneville, MS.

 ^x Boykin et al. 2005 (5).

Table 2. Hemp sesbania and pitted morningglory control two and seven wk after final POST herbicide applications at Stoneville, MS, in 2000 and 2001 with selected soybean herbicide systems suitable for glyphosate-resistant and non-transgenetic soybean.

 ^x fb = followed by. MSU-HERB denotes an herbicide treatment recommended by computer software at time of application. Recommendations were 54 g ai/ha quizalofop fb 9 g ai/ha chlorimuron in 2000 and 175 g ai/ha clethodim fb 9 g ai/ha chlorimuron in 2001. NIS at 0.25% (v/v) used with chlorimuron; COC at 1% (v/v) used with quizalofop and clethodim. 

 ^y PRE denotes a preemergence application; POST denotes a postemergence application to 5 to 10 cm tall weeds; fb POST denotes a postemergence application made to subsequent flushes of 5 to 10 cm tall weeds.

Table 3. Johnsongrass, barnyardgrass, and prickly sida control two and seven weeks after final POST herbicide applications at Stoneville, MS, in 2000 and 2001 with selected soybean herbicide systems suitable for glyphosate-resistant and non-transgenetic soybean.

 ^x fb = followed by. MSU-HERB denotes a herbicide treatment recommended by computer software at time of application. Recommendations were 54 g ai/ha quizalofop fb 9 g ai/ha chlorimuron in 2000 and 175 g ai/ha clethodim fb 9 g ai/ha chlorimuron in 2001. NIS at 0.25% (v/v) used with chlorimuron; COC at 1% (v/v) used with quizalofop and clethodim.

 ^y PRE denotes a preemergence application; POST denotes a postemergence application to 5 to 10 cm tall weeds; fb POST denotes a postemergence application made to subsequent flushes of 5 to 10 cm tall weeds.

Table 4. Visual injury 2 weeks after final POST herbicide applications and yield of early-maturing soybean at Stoneville, MS in 2000 and 2001 with various herbicide systems suitable for glyphosate-resistant and non-transgenetic soybean with and without a preharvest desiccant.^w

 ^w Desiccant treatment was 280 g ai/ha paraquat + 3360 g ai/ha sodium chlorate + nonionic surfactant at 0.25% (v/v) applied 5 to 7 days prior to harvest.

 ^x fb = followed by. MSU-HERB denotes a herbicide treatment recommended by computer software at time of application. Recommendations were 54 g ai/ha quizalofop fb 9 g ai/ha chlorimuron in 2000 and 175 g ai/ha clethodim fb 9 g ai/ha chlorimuron in 2001. NIS at 0.25% (v/v) used with chlorimuron; COC at 1% (v/v) used with quizalofop and clethodim.

 ^y PRE denotes a preemergence application; POST denotes a postemergence application to 5 to 10 cm tall weeds; fb POST denotes a postemergence application made to subsequent flushes of 5 to 10 cm tall weeds.

 ^z * denotes that means with and without a preharvest desiccant for a specific herbicide treatment are statistically different as determined by using the slice option of the lsmeans command within SAS.

Table 5. Net returns above weed management costs for early-maturing soybean at Stoneville, MS in 2000 and 2001 with various soybean herbicide systems suitable for glyphosate-resistant and non-transgenetic soybean with and without a preharvest desiccant.^w

 ^w Desiccant treatment was 280 g ai/ha paraquat + 3360 g ai/ha sodium chlorate + nonionic surfactant at 0.25% (v/v) applied 5 to 7 days prior to harvest.

 ^x fb = followed by. MSU-HERB denotes a herbicide treatment recommended by computer software at time of application. Recommendations were 54 g ai/ha quizalofop fb 9 g ai/ha chlorimuron in 2000 and 175 g ai/ha clethodim fb 9 g ai/ha chlorimuron in 2001. NIS at 0.25% (v/v) used with chlorimuron; COC at 1% (v/v) used with quizalofop and clethodim.

 ^y PRE denotes a preemergence application; POST denotes a postemergence application to 5 to 10 cm tall weeds; fb POST denotes a postemergence application made to subsequent flushes of 5 to 10 cm tall weeds.

 ^z * denotes that means with and without a preharvest desiccant for a specific herbicide treatment are statistically different as determined by using the slice option of the lsmeans command within SAS.

Table 6. Harvestability of maturity group III soybean with and without preharvest desiccant for glyphosate-resistant and conventional herbicide systems at Stoneville, MS in 2000 and 2001.^v,w

 ^v Harvestability estimated visually at harvest using a 0 to 5 scale where 0 = plots that were unable to be harvested because of excessive weed pressure and 5 = plots that were easily harvested and free of green weed matter.

 ^w Desiccant treatment was 280 g ai/ha paraquat + 3360 g ai/ha sodium chlorate + nonionic surfactant at 0.25% (v/v) applied 5 to 7 days prior to harvest.

 ^x fb = followed by. MSU-HERB denotes a herbicide treatment recommended by computer software at time of application. Recommendations were 54 g ai/ha quizalofop fb 9 g ai/ha chlorimuron in 2000 and 175 g ai/ha clethodim fb 9 g ai/ha chlorimuron in 2001. NIS at 0.25% (v/v) used with chlorimuron; COC at 1% (v/v) used with quizalofop and clethodim.

 ^y PRE denotes a preemergence application; POST denotes a postemergence application to 5 to 10 cm tall weeds; fb POST denotes a postemergence application made to subsequent flushes of 5 to 10 cm tall weeds.

 ^z * denotes that means with and without a preharvest desiccant for a specific herbicide treatment are statistically different as determined by using the slice option of the lsmeans command within SAS.

© 2007 Plant Management Network.