Changing Seasonality of Lolium rigidum (Annual Ryegrass) in Southeastern Australia

Lolium rigidum (annual ryegrass) is the most costly winter weed in Australia and has recently been observed growing summer. The occurrence of L. well documented, but there no research on populations this that germinate grow Herein, we discuss how potential cause seasonal expansion may be related to a change dormancy duration. Dormancy can affect germination patterns growth reproduction plant species depend other factors, such as temperature photoperiod. Therefore, alone cannot sole variable responsible for presence summer crops, typical conditions are not favorable weed. Additional changes development allow adaptation infestation conditions.