Which of the following crops is susceptible to Fusarium wilt?

Fusarium wilt is a significant disease affecting various crops, and cotton is one of the most notable hosts. The pathogen responsible for this disease, Fusarium oxysporum, has a specific forma specialis that targets cotton, leading to wilting, yellowing leaves, and ultimately plant death if conditions are favorable for the fungus. This susceptibility is particularly relevant for cotton, as it is one of the primary crops impacted by Fusarium wilt in agricultural settings.

Other crops mentioned, such as wheat, potato, and barley, may experience different diseases caused by Fusarium species but are not as specifically or severely affected by Fusarium wilt as cotton. For instance, wheat can be affected by Fusarium head blight, and potato can also experience issues with Fusarium, but these do not involve the wilt symptomatology characteristic of Fusarium wilt in cotton. Therefore, cotton's specific vulnerability to Fusarium wilt distinctly categorizes it as a susceptible crop in this context.