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Crop and Pasture Science Crop and Pasture Science Society
Plant sciences, sustainable farming systems and food quality
RESEARCH ARTICLE

The effect of temperature on development of soybean rust (Phakopsora pachyrhizi)

JK Kochman

Australian Journal of Agricultural Research 30(2) 273 - 277
Published: 1979

Abstract

Uredospore survival and the development of soybean rust were examined across a range of temperatures. To determine the effect of temperature on uredospore survival, samples of dry uredospores were exposed to each of a series of eight temperatures for 8 h prior to a germination test on water agar at 21°C for 4 or 16 h. Germination was significantly reduced when uredospores had been exposed to temperatures of 28.5–42.5°C. Development of rust in soybeans was examined under four temperature regimes. Following inoculation with uredospores, plant foliage was sprayed with water and kept under conditions of dew at 21°C for 16 h. Plants were then placed in a selected regime. The 17–27°C regime provided the best conditions for rust development. These findings may partially explain some of the observations on rust occurrence in the field.

https://doi.org/10.1071/AR9790273

© CSIRO 1979

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