ABSTRACT

Parthenium hysterophorus L. is an aggressive weed found in over 40 countries including Ethiopia. One of its natural enemies is the winter rust fungus Puccinia abrupta var. partheniicola. There was an outbreak of the winter rust fungus on parthenium in Ethiopia in 2020. A survey at six locations in central Ethiopia indicated a mean per cent score of winter rust fungus infection ranging from 76 ± 10% to 96 ± 6%. In 2020, for July August and September, the average rainfall (370 mm), cloud cover (65%) and relative humidity (81%) were greater than in previous years. The conditions in 2020 were ideal for germination and development of the winter rust fungus.

摘要

Parthenium hysterophorus L. 是一种在包括埃塞俄比亚在内的 40 多个国家中发现的侵略性杂草。它的天敌之一是冬季锈菌 Puccinia abrupta var。partheniicola。2020 年，埃塞俄比亚的百部枯草上爆发了冬季锈菌。对埃塞俄比亚中部六个地点的调查表明，冬季锈菌感染的平均百分比为 76 ± 10% 至 96 ± 6%。2020年7月8月和9月，平均降雨量（370毫米）、云量（65%）和相对湿度（81%）均大于往年。2020年的条件非常适合冬锈菌的萌发和发育。