Greenhouse and field evaluation of isoxaflutole for weed control in maize in China

Abstract

Greenhouse and field studies were conducted to provide a reference for pre-emergence (PRE) application of isoxaflutole on maize in China. In greenhouse study, the isoxaflutole PRE application at 30 g active ingredient (a.i.) ha−1 could effectively control large numbers of weeds, especially some large-seeded broadleaves, tested in this study. The tolerance results indicated 21 maize hybrids showed different responses to isoxaflutole under greenhouse conditions. In 2015 and 2016, field experiments were conducted to determine and compare the weed control efficacy and safety to Zhengdan 958 maize with 6 herbicide treatments. In both years, isoxaflutole PRE at 100 to 250 g a.i. ha−1 was sufficient to provide satisfactory full-season control of the dominant common broadleaf and grass weeds in the field. Temporary injury to maize was observed with isoxaflutole treatments of 125, 150, and 250 g a.i. ha−1 in both years, but plants recovered within 4 to 6 wk. To maximize maize yield and provide satisfactory weed control, a range of 100 to 150 g a.i. ha−1 of isoxaflutole is recommended, depending on the soil characteristics, weather, and weed species present at the experimental site. Based on the results, isoxaflutole PRE has good potential for weed control in maize in China.

Isoxaflutole and metribuzin interactions in isoxaflutole-resistant soybean

“…Knezevic et al (1998) reported the ED 90 of isoxaflutole to reduce A. retroflexus biomass was 100 g ha −1 ; in our study, only Site 7 had >90% reduction in biomass with isoxaflutole at the high rate (105 g ha −1 ). Results at Site 7 in this study are also consistent with Zhao et al (2017), who reported that A. retroflexus was controlled 92% to 95% with isoxaflutole at 100 g ha −1 at 30 DAA when 8.9 and 97.7 mm of rainfall was received 0 to 7 DAA in the 2 yr of their study. Sweat et al (1998) reported 8% greater A. retroflexus control with metribuzin at 420 g ha −1 at 28 DAA than the same treatment at Site 7 at 4 WAA in this study.…”

Effects of sorghum residue in presence of pre-emergence herbicides on emergence and biomass of Echinochloa colona and Chloris virgata

“…PRE herbicides play an integral role in weed control within conservation cropping systems. PRE herbicides such as imazethapyr [(Spinnaker), acetolactate synthase inhibitors], isoxaflutole [(Balance), 4-hydroxyphenyl-pyruvate dioxygenase inhibitors], S-metolachlor [(Dual Gold), cell division/ very long-chain fatty acid inhibitors], pendimethalin [(Rifle), microtubule assembly inhibitors] and prosulfocarb + metolachlor [(Boxer Gold), inhibitors of lipid synthesis and cell division/ very long-chain fatty acid inhibitors] are recommended for the control of grass weeds such as E. colona and C. virgata in many summer crops [14][15][16][17][18][19]. In this study, herbicides with different water solubility (mg/L at 20˚C) [pendimethalin (0.33), isoxaflutole (6), prosulfocarb + metolachlor (16), metolachlor (480), and while metolachlor (200), isoxaflutole (145) and imazethapyr (1.4-173) tend to highly move with soil water [20].…”

Fragments recombination, design, synthesis, safener activity and CoMFA model of novel substituted dichloroacetylphenyl sulfonamide derivatives

“… 13 DKN degrades into a benzoic acid derivative (2‐mesyl‐4‐trifluoromethyl benzoic acid) without biological activity, and this process of degradation is faster in tolerant than in susceptible species leading to herbicide selectivity 14 . Although Zea mays exhibits excellent resistance to IXF, several instances of Zea mays injury caused by IXF have been reported such as leaf and stem bleaching, plant height reduction or stunting, and reduced crop stand 15,16 . An approach to solve the problem is to introduce safeners in association with herbicides to enhance herbicide detoxification and protect crops from herbicide injury 17 …”