Only use if necessary since Alternaria can develop resistance to Rovral. To help prevent development of Rovral resistant Alternaria, Aliette may be used as an alternating treatment on a 14 day interval with Rovral. Follow rates and precautions for Aliette as given for Phytophthora leaf blight and root rot. Aliette will suppress Alternaria but cannot control it. Thus, it is not effective against Alternaria if used alone.
Efforts are underway to obtain additional registration for fungicides for ginseng disease control.
The authors gratefully acknowledge the assistance of Joe-Ann McCoy in the preparation of this manuscript. Recommendations of specific chemicals are based upon information on the manufacturer's label and performance in a limited number of trials. Because environmental conditions and methods of application by growers may vary widely, performance of the chemical will not always conform to the safety and pest control standards indicated by experimental data. All recommendations for pesticide use were legal at the time of publication, but the status of registration and use patterns are subject to change by actions of state and federal regulatory agencies. Employment and program opportunities are offered to all people regardless of race, color, national origin, sex, age, or disability.