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DETECTION OF FUSARIUM SECTION LISEOLA SPECIES THE CAUSAL OF SORGHUM SEED ROT | ||
| IRAQ JOURNAL OF AGRICULTURE | ||
| Article 1, Volume 5, Issue 16, 2011, Pages 0-0 | ||
| Authors | ||
| H .H. Al-Juboory; K. S. Juber | ||
| Abstract | ||
| This study has been carried out to detect Fusarium section liseola species which were associated with sorghum seeds ,determine their percentage of existence and test their pathogenicity. The results of isolation and identification of fungi from seeds in six fields and storages in Baghdad, Babylon and Wasit governorate showed that there were 12 species of fungi associated with seed sampls, the identification of these fungi were considered the first record on sorghum seeds in Iraq.Four of these species belong to section liseo a (F.nygami, F.sprotrichioides,F.thapsinum and F.verticillioides).F.nygami and F. verticillioides were the most frequently encountered species, their highest percentage in seed samples were 58 and 25% respectively. Preliminary test to detect the pathogenic isolates of Fusarium species by soaking injured and un injured sorghum seeds in spore suspension of sixteen Fusarium isolates from sorghum seeds revealed that the isolates were different in their ability to reduce seed germination of injured and un injured seeds with significant differences compared with the control treatment which gave 70 and 90% seed germination. The two isolates of F.nygami FNK2 & FNK2 revealed high significant reduction in seed germination when injured and un injured seeds were soaked in spore suspension of both isolates individually, the percentage of seed germination in their treatments 20 and 25% respectively. Results of study the effect of six pathogenic Fusarium species isolates under glasshouse conditions individually or in combination of F.nygami isolates showed the efficiency of the two isolates FNK2 and FNK14 individually or as incompenation of the two isolates plus the FNK8 isolate gave significant decrease in percentage of germinated seeds and decrease shoot and root length and dry weight of sorghum seedlings compared with control treatment. | ||
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