Grains and field crops
1. A.G.P. Brown and T.N. Khan - Cereal disease survey. Samples were again collected from C.V.T.s by District Office staff and sent to South Perth for evaluation. A single sampling was made in 1976 at 120 days after sowing. No samples were received from Geraldton or Three Springs trials (presumably these failed to drought). Only one sample was received from Moora, none from Merredin and only one from Jerramungup. All samples from Narrogin were lost at South Perth. A number of samples were collected well after 120 days old and were senescent. 1. E. Moora. 2. Badgingarra R.S. 3. West Dale. 4. Muresk. 5. W. Narrogin. 6. Wickepin. 7. Woogenilup. 8. Mt. Barker. 9. Chowerup. 10. Neradup. 11. E. Salmon Gums. 12. Nabawa. 13. Wongan Hills. 14. E. Wubin. 15. Cunderdin. 16. Bolgart. 17. Avondale Res. Stn. 18. Moulyinning. 19. Newdegate. 20. Jerramungup. 21. N. Kojonup. 22. Borden. 23. E. Woodanilling. 24. Ravensthorpe. 25. Merredin R.S. 26. West Grass Patch. 27. Lake Camm. 2. A.G.P. Brown - Mycosphaerella graminum - spore trap studies - A spore trap was set up on 1975 wheat stubble at Boyup Brook in April 1976. Ascospores of M. graminum the perfect state of Septoria tritici were caught almost immediately though in relatively small numbers in April. Larger amounts were caught through May, June and the first week of July until the machine broke down on July 7. The trap was restarted on August 14 but only small numbers of spores were caught in the remainder of August and September after which recording ceased. Rainfall records from Boyup Brook and Bridgetown indicate that, as expected spores are released after rain. 3. Effect of s. nodorum on yield - The aim of these experiments was to establish a relationship between yield depression under disease attack and estimates of damage to the flag leaf of 150 selections, lines and cultivars. It was done in collaboration with Dr A.A. Rosielle of Wheat and Sheep Division at Badgingarra and Wongan Hills.
Number of Pages
Brown, A G. (1976), 1976 Cereal disease survey - mycosphaerella graminum spore trap studies - s. nodorum yield. Department of Agriculture and Food, Western Australia, Perth. Report.