Abstract
Although soybean is affected by many fungal diseases from seed to harvest, charcoal rot caused by Macrophomina phaseolina is one of the most important diseases of soybean. It is important to grow resistant varieties because microsclerots can remain alive in the soil for many years, and there is currently no effective chemical control. Currently, many inoculation methods are used to determine the resistance of soybean plants to M. phaseolina; however, their effectiveness under field conditions has not been fully determined. In this study, soybean plants were inoculated with M. phaseolina during the flowering period using agar-disc, toothpick, and microsclerot injection methods, and the efficiency of these methods was investigated. In the disease observations made close to harvest, the disease index value was 3.3 in the agar disk method, 1.9 in the toothpick method and 1.3 in the microsclerot method. The results of the study showed that the symptoms in all methods were similar to those in field conditions, the agent could be transmitted by seeds and had an effect on seed quality, and the agar-disc method was the most successful method among the methods used to inoculate soybean plants with M. phaseolina under field conditions.
| Keywords: | Soybean Disease Macrophomina Charcoal rot Resistance |