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Natural Products
Catalpa ovata G.Don

The methanol extract of stems of Catalpa ovata G Don exhibits potent in vivo antifungal activity against Magnaporthe grisea (Hebert) Barr (rice blast) on rice plants, Botrytis cinerea Pers ex Fr (tomato grey mould) and Phytophthora infestans (Mont) de Bary (tomato late blight) on tomato plants, Puccinia recondita Rob ex Desm (wheat leaf rust) on wheat plants and Blumeria graminis (DC) Speer f. sp. hordei Marchal (barley powdery mildew) on barley plants. An antifungal substance was isolated and identified as dehydro-alpha-lapachone from mass and nuclear magnetic resonance spectral data. It completely inhibited the mycelial growth of B. cinerea, Colletotrichum acutatum Simmonds, Colletotrichum gloeosporioides Simmonds, M. grisea and Pythium ultimum Trow over a range of 0.4-33.3 mg litre(-1). It also controlled the development of rice blast, tomato late blight, wheat leaf rust, barley powdery mildew and red pepper anthracnose . The chemical was particularly effective in suppressing red pepper anthracnose by 95% at a concentration of 125 mg litre(-1).
 

Catalpa ovata G.Don
Research products of Catalpa ovata G.Don
Catalog Product Name CAS Number Manual
CFN99441Catalpin1390-72-3  PDF
CFN99670Catalpalactone1585-68-8  PDF
CFN996881-Hydroxy-2-prenylnaphthalene16274-34-3  PDF
CFN982159-Hydroxy-alpha-lapachone22333-58-0  PDF
CFN984639-Methoxy-alpha-lapachone35241-80-6  PDF
CFN984716'-O-p-Hydroxybenzoylcatalposide355143-38-3  PDF
CFN98473Deoxylapachol3568-90-9  PDF
CFN98702alpha-Lapachone4707-33-9  PDF
CFN989474,9-Dihydroxy-alpha-lapachone56473-67-7  n/a
CFN97148Catalposide6736-85-2  PDF
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