Related Experiment Video
Updated: Jan 28, 2026

Dry Root Rot Disease Assays in Chickpea: a Detailed Methodology
Published on: January 17, 2021
Phytophthora Species Associated with Crown and Root Rot of Apple in Chile
B A Latorre1, M E Rioja1, W F Wilcox2
1Facultad de Agronomía e Ingeniería Forestal, Pontificia Universidad Católica de Chile, Casilla 306-22, Santiago, Chile.
Abstract:
Phytophthora cactorum, P. cryptogea, P. gonapodyides, and P. megasperma were isolated from necrotic root and crown tissues or the rhizospheres of apple trees exhibiting typical symptoms of Phytophthora root and crown rot in the Central Valley of Chile. Representative isolates of all four species were pathogenic on a variety of apple rootstocks and scions in trials conducted on excised shoots and 1-year-old MM.106 rootstock grown for 4 months in infested potting medium. P. cactorum was the most frequently isolated species and the most virulent in pot tests, although a significant Phytophthora sp.-apple genotype interaction was observed. This is the first report of any species other than P. cactorum causing root and crown rot of apple trees in Chile.
Related Concept Videos
Crown Ethers
What is a Species?
Keystone Species
Formation of Species
Primary and Secondary Growth in Roots and Shoots
Root Mean Square
For example, consider the velocity of gas molecules in a container. The gas molecules are moving in different directions, which might impart positive and negative...

