ABSTRACT
The efficiency of fungicides and depth of seed sowing on the control of Bipolaris sorokiniana in wheat seeds and on emergence and seedling development was evaluated. Lab and greenhouse tests were performed, using seeds of the IAC 24 wheat cultivar with 34.7% of natural infection. All chemical treatments reduced the incidence of B. sorokiniana, which was eliminated when the seeds were treated with guazatine, tebuconazole + imazalil and guazatine + imazalil. No significant interaction was seen between treatments and depth sowing. However, there was delaying of emergence and seedling development when the seeds treated were sown at greater depth, especially on the initial phases. There was observed a high correlation (r = 0.95**) between percentages of wheat seed incidence by B. sorokiniana and seedling crown lesion severity, and r = – 0.79* and – 0.75*, respectively for seed pathogen incidence and emergence and seed pathogen incidence and plant height in pots.
KEY WORDS
fungicides;
Triticum aestivum
;
Bipolaris sorokiniana