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- Title
Persistence of fluopyram under varying moisture conditions in laterite and red loam soils of Kerala, India.
- Authors
Lohithaswan, E. N.; George, T.; Subhachandrakumar, V. K.
- Abstract
Fluopyram is a novel broad-spectrum fungicide-cum nematicide molecule belonging to 'pyridinyl ethyl benzamides'. Due to its dual bioactivity, fluopyram is predicted to be the most widely used pesticide in India. Fluopyram being applied in soil, there is a high chance for its entry into the plant parts by translocation and to water by leaching process. The study of the persistence of fluopyram, particularly in the, assumes importance as the persistence decides the level of accumulation and environmental risks. An experiment was conducted to study the persistence of fluopyram in laterite and red loam soils by spiking the respective soils using fluopyram at 1, 2 and 4 mg kg−1 levels, followed by incubating at 25 °C in the laboratory each at air-dry and field capacity moisture levels. The half-life of fluopyram in air-dry and field capacity moisture conditions was found to be 27.66, 28.83, 30.04 days and 17.50, 18.77, 23.47 days in laterite soil and 22.11, 23.72, 26.17 days under the air-dry condition and 15.99, 18.35, 23.32 days in red loam soil, respectively, at 1, 2 and 4 mg kg−1. Fluopyram benzamide was not detected. Degradation of fluopyram was influenced primarily by soil type, organic matter, treatment level and moisture content. The persistence of fluopyram was higher in laterite soil, and degradation of fluopyram was relatively faster at field capacity moisture conditions than in air-dry conditions in both soils. Application of fluopyram at higher concentration resulted in a prolonged persistence (80 days) as compared to lower levels.
- Subjects
INDIA; RED soils; LATERITE; LOAM soils; MOISTURE; PLANT translocation
- Publication
International Journal of Environmental Science & Technology (IJEST), 2023, Vol 20, Issue 8, p8875
- ISSN
1735-1472
- Publication type
Article
- DOI
10.1007/s13762-022-04455-7