Effect of soil pH on common bean (Phaseolus vulgaris L.) sensitivity to simulated mesotrione residues

master's thesis

• Author: Laura Pismarović
• Mentor: Maja Šćepanović (mentor)
• Committee member: Maja Šćepanović (predsjednik povjerenstva)
• Committee member: Boris Lazarević (član povjerenstva)
• Committee member: Kristina Kljak (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Herbology); Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Under certain field conditions, mesotrione persists in the soil longer than expected and damages sensitive crops in the rotation. Soil pH has the greatest influence on the persistence of mesotrione in soil. The bioassay was conducted to evaluate the effect of soil pH on the sensitivity of common bean to simulated mesotrione residues (SMR). The natural soil was manipulated to obtain three pH values: 6.5, 5.5 and 4.5 (pH1-pH4) and was treated with seven SMR from 1.1 to 72 to g a.i. ha-1. The fresh aboveground bean weight and photosynthetic pigments were reduced, but the extent of the inhibitory effect depended on SMR and soil pH. The highest phytotoxic injury to common bean was recorded in all soils 28 DAT at 72 g a.i. ha-1 (96.5 to 100%), with the least damage at pH4 (20%). Bean fresh weight was reduced most on soil pH1 where 86.47 % reduction was observed. Carotenoid content was significantly reduced by average of 52.13 %, 45.84 % on soil pH1 and pH2, respectively. Common bean was more sensitive to SMR grown on neutral/alkaline soils.

• Keywords: mesotrione; common bean; soil pH; simulated residue carryover; phytotoxicity
• Language: english
• URN:NBN: urn:nbn:hr:204:136373
• Study programme: Title: Environment, Agriculture and Resource Management; Study programme type: university; Study level: graduate; Academic / professional title: Master of Engineering in Agriculture (Master of Engineering in Agriculture)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-12-20 10:21:40