Effect of the residual activity of pre-emergent herbicides applied in soybean on pearl millet cultivated in succession

Planta Daninha

Dan, L.G.M.¹  Universidade Estadual de Maringá¹  FESURV¹  Barroso, A.L.L.¹  Feldkircher, C.¹  Silva, A.G.¹  Instituto Federal Goiano, Iporá¹  Embrapa Soja, Londrina¹  FESURV, Rio Verde¹  Assis, R.L.¹  Procópio, S.O.¹  Oliveira JR., R.S.¹  UEM¹  Universidade Estadual de Maringá, Maringá¹  Dan, H.A.¹ 

关键词: carryover;    sulfentrazone;    diclosulam;    imazaquim;    flumioxazin;    Pennisetum glaucum;   

DOI  :  10.1590/S0100-83582011000200022

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

The objective of this study was to evaluate the persistence of herbicides applied in pre-emergence in soybean crop and the effects of these herbicides on pearl millet grown in succession. The herbicides imazaquin (0.160 kg ha-1), diclosulam (0.035 kg ha-1), sulfentrazone (0.600 kg ha-1), and fumioxazin (0.050 kg ha-1) were used immediately after sowing of soybean Msoy-6101, in plots of 80 m2, divided into sub-plots of 20 m2 (5 x 4 m). A randomized block design with four replications was used in a split-plot scheme 5 x 4. In the sub-plots, pearl millet hybrid ADR-7010 was sown in four periods after herbicide application, corresponding to 0, 40, 80 and 120 days after herbicide application (DAA). Pear millet injury, stand, height and dry biomass of the plant were evaluated at 7, 15, and 28 days after emergence; crop grain yield was evaluated at the end of the cycle. Pearl millet hybrid ADR-7010 showed high sensitivity to the residual activity of sulfentrazone, imazaquin, and diclosulam when grown immediately after herbicide application. The bioactivity of imazaquin, diclosulam, and flumioxazin was not sufficient to affect grain yield of millet grown after soybean (120 DAA), suggesting that this interval is sufficiently long for dissipation of these herbicides. Among the pre-emergent herbicides, sulfentrazone showed longer residual activity, negatively influencing the crop's yield during the time interval studied.

【 授权许可】

Unknown