EFFICIENCY OF SOME ECHO FRIENDLY MICROELEMENTS IN CONTROLLING SOYBEAN DAMPING-OFF
نویسندگان
چکیده
Soybean plants doubted to be infcted with damping-off were collected from different naturaly infected districts of Dakahlia Governorate. Frequency the isolated pathogens revealed that Fusarium solani, oxysporum, Rizoctonia Pythium ultimum and Macrophomina Phaseolina. most aggressive pathogenic fungi causing highest percentage pre-emergence in Giza 35and 111soybean cultivars. Among five fungi, only F. R. solani P. ones. exhibit post-emergence both cultivars followed by solani. Moreover,the haelthy survived soybean obtained when ultimum, was investigated. In vitro study boron, cobalt molybdenum proved microelemnts affected pathogen evaluated at any microelements compared ultimumthe. Cobalt 5ppm reveal growth reduction against 3 where it valued 74%. However, least inhibitory effect recorded used 2ppm being 34.77% for three fungi. Whereas, boron 2 ppm apparently equal 5 ppm. vivo experiments two consecutive growing seasons 2016 2017, molybdenum(5 ppm) effective percentages pre post emergence (5.66) (2 resulting 8%, meanwhile, 9% .Plant morphological parameters treated showed plant height ranged 89 cm (5 111.6 cultivar 35 season 96.0 118.6 2017 season. The chlorophyll a b values application then boron. Carotenoids total phenols ppm), used. Oil protein seeds reported applied cobalt.
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ژورنال
عنوان ژورنال: Zagazig Journal of Agricultural Research
سال: 2021
ISSN: ['1110-0338']
DOI: https://doi.org/10.21608/zjar.2021.165674