+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Attenuation of metalaxyl on potato leaves by simulated acidic rain and residence time



Attenuation of metalaxyl on potato leaves by simulated acidic rain and residence time



Phytopathology 77(3): 401-406



Greenhouse-grown rooted potato cuttings (cultivars Norchip and Monona) were sprayed with 200 ppm metalaxyl 78, 30, 6, or 0 hr before exposure to simulated rain at pH 2.8, 3.4, 4.0, or 4.6 at an intensity of 8.8 mm/hr for 0, 10, 20, or 30 min. The experiment was repeated with shorter time intervals between applications of the fungicide and simulated rain (0, 3, 6,30, and 54 hr) and shorter rainfall durations (0, 3, 6, 10, and 20 min). Metalaxyl content of foliar tissue was determined by a bioassay with Phytophthora boehmeriae after chemical extraction. At the end of each experiment, plants treated with metalaxyl and simulated rain were inoculated with P. infestans to determine residual activity of the fungicide in situ. The concentration of metalaxyl declined exponentially with time after application and with rainfall duration, until asymptotes were reached about 30 hr after spraying or after 10 min of simulated rain (1.47 mm of rain). Fungicide wash-off was not affected by the acidity of rain or cultivar. Attenuation of metalaxyl over time and by rain was predicted accurately by an exponential decay model with an asymptote. Despite a rapid initial decrease in metalaxyl concentration, residual concentrations (5-10% of the original deposit) were still sufficient to control late blight.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 001533701

Download citation: RISBibTeXText


Related references

Effects of simulated acidic rain on wash off of fungicides and control of late blight on potato solanum tuberosum leaves. Phytopathology 76(8): 800-804, 1986

Responses of leaves of phaseolus vulgaris cultivar university of idaho 111 to simulated acidic rain. New Phytologist 88(3): 403-420, 1981

Retention of maneb and cupric hydroxide and control of late blight on potato foliage exposed to simulated acidic rain in the field. Agriculture Ecosystems & Environment 24(4): 431-442, 1988

Effects of simulated acidic rain applied alone and in combination with ambient rain on growth and yield of field-grown snap bean. Agriculture ecosystems and environment: 161-172, 1984

Effects of simulated acidic rain applied alone and in combination with ambient rain on growth and yield of field grown snap bean phaseolus vulgaris cultivar provider/. Agriculture Ecosystems & Environment 11(2): 161-172, 1984

Protein contents of seed yields of field-grown soybeans exposed to simulated acidic rain: assessment of the sensitivities of four cultivars and effects of duration of simulated rainfall. New Phytologist 103(4): 689-693, 1986

Protein contents of seed yields of field grown soybean glycine max exposed to simulated acidic rain assessment of the sensitivities of four cultivars and effects of duration of simulated rainfall. New Phytologist 103(4): 689-694, 1986

Satellite and Terrestrial Links Rain Attenuation Time Series Generator for Heavy Rain Climatic Regions. IEEE Transactions on Antennas and Propagation 61(6): 3396-3399, 2013

Persistence of metalaxyl and mancozeb on potato leaves and their residues in tubers. Pakistan Journal of Biological Sciences 15(1): 44-48, 2012

Physical-mathematical model of the dynamics of rain attenuation based on rain rate time series and a two-layer vertical structure of precipitation. Radio Science 31(2): 281-295, 1996

Infection and growth of phytophthora infestans in potato leaves after treatment with metalaxyl. Biologischen Bundesanstalt Fuer Land- Und Forstwirtschaft (West German Federal Biological Institute For Agriculture And Forestry) Mitteilungen Aus Der Biologischen Bundesanstalt Fuer Land- Und Forstwirtschaft, Berlin-Dahlem, Heft 223 44 Deutsche Pflanzenschutz-Tagung, Giessen, 8 -12 Oktober 1984 (Communications From The Federal Biology Institute For Agriculture And Forestry, Berlin-Dahlem, No 223 44th German Plant Protection Meeting, Giessen, West Germany, Oct 8-12, 1984) Xxxvii+35, 1985

Response of rhizosphere microorganisms to ozone and simulated acidic rain. Phytopathology 76(10): 1096, 1986

Responses of loblolly pine to ozone and simulated acidic rain. Canadian Journal of Forest Research 26(10): 1715-1723, 1996

Influence of ozone and simulated acidic rain on microorganisms in the rhizosphere of Sorghum. Environmental Pollution 51(2): 131-152, 1988

Effects of simulated acidic rain on retention of pesticides on leaf surfaces. Phytopathology 74(11): 1377-1380, 1984