Open AccessRoot treatment with oxathiapiprolin, benthiavalicarb or their mixture provides prolonged systemic protection against oomycete foliar pathogens
Author(s) -
Yigal Cohen
Publication year - 2020
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0227556
Subject(s) - downy mildew , oomycete , pseudoperonospora cubensis , fungicide , blight , biology , phytophthora infestans , horticulture , systemic acquired resistance , metalaxyl , phytophthora , agronomy , microbiology and biotechnology , arabidopsis , gene , mutant , biochemistry , pathogen
Oxathiapiprolin is a fungicide effective against downy mildews of cucumber ( Pseudoperonospora cubensis ) and basil ( Peronospora belbahrii ) and late blight of tomato ( Phytophthora infestans ). To avoid fungicide resistance, it is recommended to apply oxathiapiprolin as a mixture with a partner fungicide that have a different mode of action. Here it is shown that a single application of oxathiapiprolin, benthiavalicarb, or their mixture (3+7, w/w) to the root of nursery plants grown in multi-cell trays provided prolonged systemic protection against late blight and downy mildews in growth chambers and in field tests. Soil application of 1mg active ingredient per plant provided durable protection of up to four weeks in tomato against late blight, cucumber against downy mildew and basil against downy mildew. Not only did the mixture of oxathiapiprolin and benthiavalicarb provide excellent systemic control of these diseases but also mutual protection against resistance towards both oxathiapiprolin and benthiavalicarb.