Fungicidial activity of benthiavalicarb-isopropyl against Phytophthora infestans and its controlling activity against late blight diseases

• Published in: Journal of Pesticide Science 2005, Vol.30(4), pp.390-396
• Main Authors: Miyake, Y.(Kumiai Chemical Industry Co. Ltd., Kikugawa, Shizuoka (Japan). Life Science Research Inst.), Sakai, J, Shibata, M, Yonekura, N, Miura, I, Kumakura, K, Nagayama, K
• Format: Article
• Language: English
• Subjects: benthiavalicarb-isopropyl; Biological and medical sciences; BLIGHT; CARBAMATE; CARBAMATES; CARBAMATOS; CONTROL DE ENFERMEDADES; CONTROLE DE MALADIES; DEPERISSEMENT; DISEASE CONTROL; FONGICIDE; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; FUNGICIDAS; FUNGICIDES; late blight; Lycopersicon esculentum; Oomycete; Phytopathology. Animal pests. Plant and forest protection; Phytophthora; PHYTOPHTHORA INFESTANS; Pythium; Solanum tuberosum; TIZON
• ISSN: 1348-589X; 0385-1559; 1349-0923
• DOI: 10.1584/jpestics.30.390

Benthiavalicarb-isopropyl, a novel member of the amino acid amide carbamate group of fungicides, is effective against all Oomycete fungal plant pathogens except Pythium spp. Our results demonstrate that this fungicide effectively controls potato and tomato late blight caused by metalaxyl-sensitive and -resistant strains of Phytophthora infestans. Experiments in vitro demonstrated that benthiavalicarb-isopropyl was ineffective in stopping the discharge of zoospores from zoosporangia and suppressing their motility; but strongly inhibited mycelial growth, sporulation, and the germination of sporangia and cystospores. Experiments in a greenhouse showed that benthiavalicarb-isopropyl has not only a strong preventive, but also a curative effect; its translaminar properties are effective along with its rainfastness and residual activity. In field trials, it was effective in controlling tomato and potato late blight at 25-75 g a.i./ha.