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Effects of Induced Epidemics of Heterodera glycines, Diaporthe phaseolorum var. caulivora , and Pseudomonas syringae pv. glycinea in Single Inoculations or in Combinations on Soybean Yield and Other Agronomic Characters
Author(s) -
Pacumbaba R. P.
Publication year - 1992
Publication title -
journal of agronomy and crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.095
H-Index - 74
eISSN - 1439-037X
pISSN - 0931-2250
DOI - 10.1111/j.1439-037x.1992.tb01024.x
Subject(s) - biology , inoculation , pseudomonas syringae , heterodera , sowing , horticulture , agronomy , yield (engineering) , microbiology and biotechnology , pathogen , nematode , ecology , materials science , metallurgy
The effects of induced epidemics of Heterodera glycines (Hg), Diaporthe phaseolorum var. caulivora (Dpc), and Pseudomonas syringae pv. glycinea (Psg) in single inoculations or in combinations on soybean yield and other agronomic characters were studied in the field for 3 planting dates from 1985–1987. Agronomic characters, such as size of nodules, number of pods, plant heights, yields, and disease ratings and infestations of soybean were noticeably influenced by the induced epidemics of the pathogens affecting soybeans. Similarly, the induced epidemics of these pathogens also produced either a negative or positive correlation coefficient of the various indicated agronomic characters. Synergistic‐yield loss interaction between Dpc + Psg was positive. However, the synergistic‐yield loss interactions between Dpc + Hg, Hg + Psg, and Dpc + Hg + Psg were negative. Based on the symptomatology of the diseases, there were no synergisms noted on soybean.