Mode of Action of the Novel Rice Blast Fungicide KTU 3616

✍ Scribed by Kurahashi, Y.; Hattori, the late T.; Kagabu, S.; Pontzen, R.

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 366 KB
• Volume: 47
• Category: Article
• ISSN: 1526-498X
• DOI: 10.1002/(sici)1096-9063(199606)47:2<199::aid-ps382>3.0.co;2-f

✦ Synopsis

R-2,2-dichloro-N-[1-(4-

chloropheny1)ethyll-1 -ethyl-3methylcyclopropanecarboxamide ; proposed common name carpropamid; Fig. l} provides outstanding protective efficacy, with systemic properties in the control of rice blast (caused by Pyricularia oryzae Cavara), and was developed jointly by Bayer AG and Nihon Bayer Agrochem. A single application of the granular formulation to the nursery box a few days before transplanting controls not only leaf blast but also panicle blast. KTU 3616 has a specific mode of action which differs from that of other derivatives of cyclopropane carboxylic acid.

KTU 3616 did not show any remarkable activity against various plant pathogenic fungi and bacteria in culture tests but the colour of the mycelium was changed in many fungi. Spore germination and appressorium formation in P . oryzae were not influenced substantially but the pigmentation of appressorium cells was strongly inhibited, even at very low application