Pyrenophora

Control wide range of pathogens like Tapesia yallundae, T. acuformis, Erysiphe spp., Pyrenophora teres, Rhynchosporium secalis, Botrytis spp., in cereals, grapes, pome fruit, stone fruit, strawberries, vegetables, field crops and ornamentals, barley Altemaria spp., Venturia spp. and... 

Pyrenophorin (9) is a bis lactone antibiotic produced by the microorganism Pyrenophora avenae. Diolide 9 is a head-to-tail dimer of a 7-hydroxy-2-ene-4-one carboxylic acid with methyl groups appended to the diolide ring. Retrosyn-thetically, the central strategy employed in almost all approaches is lactonization of the appropriate monomeric hydroxy acid to the diolide. 

The biosynthetic reduction of the polyketide chain may prevent the formation of aromatic products. Instead, several lactones are formed. For example, a series of bio-active pentaketide metabolites containing a ten-membered ring have been isolated. These include the diplodialides e.g. diplodialide A, 4.73) from Diplodia pinea, the pyrenolides e.g. pyrenolide A, 4.74) from Pyrenophora teres and the cephalosporolides e.g. cephalosporolide B, 4.75) from Cephalosporium aphidi-cola. An unusual dimeric pentaketide, thiobiscephalosporolide A (in which the two lactones are held together by a sulfur), has also been obtained from... 

Magnus, A.H. 1970. Mercury-tolerance in Pyrenophora avenae in Norway. Meldinger Norges Landbrukshoyskle, 49, 1-8. 

Organomercurials 40 Cereal leaf spot and stripe Pyrenophora spp. Low... 

To fill a classical gap in the control of seed-home diseases, triazoxide was developed as a fungicide with activity against one single disease complex, the seed-borne Pyrenophora diseases. 

Leaf stripe on barley Pyrenophora graminea) Loose smut on barley (Ustilago nuda) 2-4 g-a.i. per 100 kg seed (seed treatment) 2-4 g-a.i. per 100 kg seed (seed treatment)... 

Dutzmann, S. Triazoxide - a seed treatment fungicide for the control of seed borne Pyrenophora species. BCPC Monograph (1994) 57, 85-89. 

Ascomycetes Sphaeriales Diaporthe Gnomonia Pyrenophora Sclerotinia... 

Ascomycetes Eurotiales Hypocreales Sphaeriales Thielavia Cordyceps Gibberella Chaetomium Co chlio bolus Daldinia Glomerella Ophiobolus Pyrenophora Xylaria... 

A new fungal morphogenic metabolite reported from Pyrenophora teres. called... 

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