Translator Disclaimer
1 June 2017 Response of Drought-Stressed Grafted and Nongrafted Tomato to Postemergence Metribuzin
Sushila Chaudhari, Katherine M. Jennings, David W. Monks, David L. Jordan, Christopher C. Gunter, Frank J. Louws
Author Affiliations +
Abstract

Tomato grafting is practiced worldwide as an innovative approach to manage stress from drought, waterlogging, insects, and diseases. Metribuzin is a commonly used herbicide in tomato but has potential to cause injury after application if plants are under stress. The influence of metribuzin on grafted tomato under drought-stress has not been studied. Greenhouse experiments were conducted in Raleigh, NC to determine the tolerance of drought-stressed grafted and non-grafted tomato to metribuzin. The tomato cultivar ‘Amelia’ was used as the scion in grafted tomato, and for the non-grafted control. Two hybrid tomato ‘Beaufort’ and ‘Maxifort’ were used as rootstocks for grafted plants. Drought-stress treatments included: no drought-stress; 3 d of drought-stress before metribuzin application with no drought-stress after application (3 d DSB); and 3 d of drought-stress before metribuzin application with 3 d of drought-stress after application (3 d DSBA). Metribuzin was applied at 550 g ai ha-1. No difference in injury from metribuzin was observed in grafted and non-grafted plants. However, at 7 and 14 d after metribuzin treatment (DMT), less injury was observed on tomato in the 3 d DSBA treatment (5 and 2% injury, respectively) than on plants in the 3 d DSB treatment (15 and 8% injury, respectively) or those that were never drought-stressed (18 and 11% injury, respectively). Photosynthesis and stomatal conductance measured prior to metribuzin application were reduced similarly in grafted and non-grafted tomato subjected to drought-stress. Photosynthesis and stomatal conductance of grafted and non-grafted tomato at 7 DMT was not different among drought-stress treatments or metribuzin treatments. Grafted and non-grafted tomato plants under drought-stress exhibit similar tolerance to metribuzin. The risk of metribuzin injury to grafted tomato under drought-stress is similar to non-grafted tomato.

Nomenclature: Metribuzin; tomato, Solanum lycopersicum L.

© Weed Science Society of America, 2017
Sushila Chaudhari, Katherine M. Jennings, David W. Monks, David L. Jordan, Christopher C. Gunter, and Frank J. Louws "Response of Drought-Stressed Grafted and Nongrafted Tomato to Postemergence Metribuzin," Weed Technology 31(3), 447-454, (1 June 2017). https://doi.org/10.1017/wet.2017.12
Received: 28 October 2016; Accepted: 1 February 2017; Published: 1 June 2017
JOURNAL ARTICLE
8 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top