Untitled - International Rice Research Institute
Untitled - International Rice Research Institute
Untitled - International Rice Research Institute
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Contents<br />
Foreword<br />
Preface<br />
v<br />
vi<br />
INTRODUCTION 1<br />
FUNCTIONS OF SEED HEALTH TESTING 3<br />
Cataloguing pathogens of crops 3<br />
Detection methods 3<br />
Post introduction measures 5<br />
THE MISSING LINK 6<br />
Epidemiology 6<br />
Disease and infection cycles 7<br />
Seed transmission 8<br />
Relationship between seedborne inoculum and 9<br />
disease development in the field<br />
Inoculum level and inoculum thresholds 9<br />
Risk analysis 10<br />
Microorganisms associated with seed 11<br />
SEED HEALTH MANAGEMENT FOR CROP PRODUCTION 12<br />
IDENTIFICATION OF FUNGI DETECTED ON RICE SEED 13<br />
Seedborne fungi causing foliage diseases in rice 14<br />
Alternaria padwickii 14<br />
Bipolaris oryzae 17<br />
Cercospora janseana 21<br />
Microdochium oryzae 24<br />
Pyricularia oryzae 27<br />
Seedborne fungi causing stem, leaf sheath, and root diseases in rice 31<br />
Fusarium moniliforme 31<br />
Sarocladium oryzae 35<br />
Seedborne fungi causing grain and infloresence diseases in rice 38<br />
Curvularia sp. 38<br />
Fusarium solani 42<br />
Nigrospora sp. 44<br />
Phoma sorghina 47<br />
Pinatubo oryzae 51<br />
Tilletia barclayana 53<br />
Other fungi detected on rice seeds 57<br />
Acremoniella atra 58<br />
Acremoniella verrucosa 58<br />
iii