Efficacy of orysastrobin against blast and sheath blight in transplanted rice

  title={Efficacy of orysastrobin against blast and sheath blight in transplanted rice},
  author={Gerd Stammler and Manabu Itoh and Isao Hino and Akihide Watanabe and Ken'ichi Kojima and Masatoshi Motoyoshi and Andreas Koch and Egon Haden},
  journal={Journal of Pesticide Science},
Orysastrobin is a new QoI fungicide with excellent fungicidal efficacy against leaf and panicle blast and against sheath blight in rice. Formulations developed for seedling box treatments provide long lasting residual control combined with excellent plant selectivity under different environmental conditions. The sensitivity was monitored based on genetic assays. No samples with reduced sensitivity could be detected in our extensive monitoring studies in 2004 and 2005. 
Rice Pathogens in Japan
The history of fungicide resistance occurred on rice blast disease and research and countermeasure taken in the country are summarized in this chapter.
A New Carboxynilide Group Fungicide against Paddy Sheath Blight
Thifluzamide, a new fungicide of carboxynilide group was tested for the efficacy against rice sheath blight during 2005, 2006 and 2009 and was found effective in reducing the disease severity and increasing the yield.
Induced resistance against a bacterial disease by orysastrobin, a chemical fungicide
The findings suggested that the fungicide, orysastrobin, induced resistance to the pathogenic pseudomonad, and applications of this strobilurin-type fungicide have the potential to protect plants from a large array of pathogens and abiotic stresses.
Chemical control of plant diseases
The task is to maintain the effectiveness and diversity of the present modes of action for fungicides and implement countermeasures against the development of fungicide resistance.
Multiplex PCR assay for simultaneous detection of MBI-D and QoI resistance in rice blast fungus
Simple and reliable PCR-based DNA markers to detect isolates resistant to melanin biosynthesis inhibitor targeting scytalone dehydratase and quinone outside inhibitor fungicides and detected resistance to both MBI-D and QoI in a single PCR and further reduced the time needed for diagnosis.
Effect of Nitrogen, Silicon, Rice By-product and Fungicide for Management of Rice Blast Disease in Mwea Irrigation Scheme of Kenya Catherine
A thesis submitted in partial Fulfillment for the degree of Master of Science in Horticulture in the Jomo Kenyatta University of Agriculture and Technology 2012
Physiological effects of strobilurin and carboxamides on plants: an overview
The physiological effects detected when applying strobilurins or carboxamides in healthy plants are due to the increase in net photosynthesis, as it temporarily reduces plant respiration, which led to less carbon dioxide loss and, consequently, generates more energy for the plant.
Rapid PCR technique to detect QoI-resistant strains of Magnaporthe oryzae
Two types of PCR-based DNA markers are developed that enable easy detection of resistant strains by using DNA templates prepared from filter paper permeated with the fungus.
Detection and molecular characterisation of Pyrenopeziza brassicae isolates resistant to methyl benzimidazole carbamates.
The molecular mechanisms affecting sensitivity to MBCs in P. brassicae have been identified and Pyrosequencing assays are a powerful tool for quantifying fungicide-resistant alleles in pathogen populations.
A Two-Step Molecular Detection Method for Pyrenophora tritici-repentis Isolates Insensitive to QoI Fungicides.
The results suggest that this newly developed two-step molecular detection method is rapid, robust, and specific to monitor QoI-insensitive and -reduce-dsensitive isolates of P. tritici-repentis.


Recent Topics on Action Mechanisms of Fungicides
Management strategies for fungicide resistance may become a part of registration requirements worldwide because of a growing interest in non-fungicidal disease-controlling agents since they are supposedly specific to target organisms and less likely to cause resistance.
Field Resistance to Strobilurin (Q(o)I) Fungicides in Pyricularia grisea Caused by Mutations in the Mitochondrial Cytochrome b Gene.
DNA fingerprinting of resistant isolates revealed that the mutations occurred in just five genetic backgrounds, suggesting that field resistance to the Q(o)I fungicides in Pyricularia grisea is due to a small number of ancestral mutations.
Occurrence and molecular characterization of strobilurin resistance in cucumber powdery mildew and downy mildew.
It is suggested that a mutation at position 143 in the target-encoding gene, resulting in an amino acid substitution, was probably a major cause of the rapid development of high strobilurin resistance in these two pathogens.
Monitoring of the sensitivity of Magnaporthe grisea to metominostrobin 2001-2003: No emergence of resistant strains and no mutations at codon 143 or 129 of the cytochrome b gene
The sensitivity of Magnaporthe grisea to Metominostrobin (ORIBRIGHT®, a QoI fungicide) was examined and a point mutation at nucleotide position +428 or +387 in the cytochrome b gene, resulting in the replacement of glycine 143 with alanine (G143A) or of phenylalanine 129 with leucine (F129L) was not observed in any of the 96 field isolates.
Pyrosequencing sheds light on DNA sequencing.
Key features regarding different aspects of pyrosequencing technology are considered, including the general principles, enzyme properties, sequencing modes, instrumentation, and potential applications.
Analysis of any point mutation in DNA. The amplification refractory mutation system (ARMS).
A system, ARMS (Amplification Refractory Mutation System), that allows genotyping solely by inspection of reaction mixtures after agarose gel electrophoresis, which is simple, reliable and non-isotopic.
Determination of single-nucleotide polymorphisms by real-time pyrophosphate DNA sequencing.
This work addresses the issue of SNP genotype determination by investigating variations within the Renin-Angiotensin-Aldosterone System using pyrosequencing, a real-time pyrophosphate detection technology and provides extensive flexibility in regard to the positioning of sequencing primers.