Premium
Efficacy of metam potassium on Fusarium oxysporum , Macrophomina phaseolina , Meloidogyne javanica , and seven weed species in microcosm experiments
Author(s) -
Khatri Kshitij,
Vallad Gary,
Peres Natalia,
Desaegaer Johan,
Regmi Homan,
Boyd Nathan
Publication year - 2021
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.6091
Subject(s) - macrophomina phaseolina , biology , fusarium oxysporum , weed , meloidogyne javanica , agronomy , root rot , horticulture , nematode , ecology
Background Metam potassium (metam‐K) is a soil fumigant widely used to control plant pathogens, nematodes, and weeds in Florida plasticulture production. The objective of the study was to determine the efficacy of metam‐K against Fusarium oxysporum , Macrophomina phaseolina , Meloidogyne javanica , and seven important weed species under controlled conditions. The optimal rates generated in this study provide insight into the efficacy of metam‐K for field application. Results F. oxysporum and M. phaseolina were similarly sensitive toward metam‐K with a 90% effective concentration (EC 90 ) of 478 and 493 μmol kg −1 soil, respectively. Meloidogyne javanica was the most sensitive pest with an EC 90 of 25 μmol kg −1 which is similar to previous studies. Chenopodium album was the most sensitive weed seed with an EC 90 of 260 μmol kg −1 . Geranium carolinianum and Medicago lupulina were the least sensitive weed species with EC 90 values of 786 and 567 μmol kg −1 , respectively. Conclusion It is apparent from these results that metam‐K can effectively control important pests in Florida plasticulture production systems with the correct application rate and adequate exposure of pest to the fumigant.