Japanese knotweed (2020) – biological control

Effect of humidity and temperature on the performance of three strains of Aphalara itadori, a biocontrol agent for Japanese Knotweed.

© CABI/Richard H. Shaw

Scientists used Aphalara itadori, a plant louse that feeds on Japanese knotweed (Fallopia japonica), to investigate its effectiveness as a biocontrol across varying conditions. When exposed to a range of differing temperatures and humidity, two out of the three strains of A. itadori displayed a significant effect in depletion of above-ground biomass, with little rhizome damage. As a result, a beneficial role in the chosen strains used was highlighted, but more testing of appropriate strains is warranted. Testing of other variables, such as climate, plant stressors, psyllid-rhizome interactions, and psyllid overwintering performance is recommended for future studies.

Fung, C., González-Moreno, P., Pratt, C., Oliver, T.H., Bourchier, R.S. and González-Suárez, M. (2020). Effect of humidity and temperature on the performance of three strains of Aphalara itadori, a biocontrol agent for Japanese Knotweed. Biological Control, 146, p.104269.

 

Invasive Species Ireland

Invasive Species Ireland