Abstract
A laboratory method is described for determining the survival of Helminthosporium sativum spores in soil. An oil–water emulsion containing the spores is mixed with potato dextrose agar supplemented with molasses; microscope slides are then dipped into the mixture, incubated, and examined for spore germination. Application of the method showed that viability of spores in a dry soil did not decline over a 9-month period whereas survival of spores in saturated soil dropped markedly in the same period. Intermediate moisture levels had intermediate effects on the spores. Studies on spores obtained directly from cultivated fields indicated little mortality from fall to spring. A summerfallow year between two wheat crops resulted in a substantial decline in percentage of viable spores.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
