Root and Foot Rot on Tomato Caused by Phytophthora infestans Detected in Belgium

Plant Disease
B LievensB P H J Thomma

Abstract

In January 2003, a severe root and foot rot was observed on 2-month-old wilted tomato (Lycopersicon esculentum Mill.) plants in a large-scale (2.5 ha) commercial greenhouse setting in Belgium. Tomato plants (10%) produced from healthy nursery-grown seedlings and planted to new, clean rockwool and drip irrigation with UV-disinfected water developed symptoms. Symptom development was restricted to lower plant parts with severe rotting of the entire root system and dark lesions girdling the stem base. No symptoms of disease were observed on the foliage or upper stems. Cross sections of the stem base revealed brown discoloration of internal tissue, including the vascular tissue and pith. Dark brown lesions also occurred on the roots. Sections of the stem base, the upper roots (sampled near to the stem base), and the lower roots (sampled on roots deeper in the rockwool) were plated separately on corn meal agar. The oomycete pathogen Phytophthora infestans (Mont.) de Bary was identified in each sample on the basis of morphological characteristics observed directly with light microscopy. Branched sporangiophores with slight swellings and characteristic lemon-shaped sporangia (35 × 20 μm and ratio length/width of 1.75 μm) at their tips ...Continue Reading

Citations

Jul 18, 2019·Molecular Ecology·Andreas MakiolaTravis R Glare
Jan 27, 2006·FEMS Microbiology Letters·Bart LievensBart P H J Thomma
Oct 20, 2005·Environmental Microbiology·Bart LievensBart P H J Thomma

❮ Previous
Next ❯

Related Concepts

Related Feeds

Antifungals (ASM)

An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.

Antifungals

An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.