May 2021


Cover Story

Exceeding expectations

This year’s top performers at the American Rose Trials for Sustainability allow the entire green industry a chance to score big with rose-loving consumers.


Stomp out root rot

Researchers are working on better ways to detect Phytophthora spp. in the nursery.

How plant diseases spread

Nurseries should be aware of the sources of pathogens for each crop they grow and diligently work to eliminate those sources of disease to the greatest extent possible.

Tracing Agrobacterium

Extensive genetic sequencing allowed researchers to infer both how bacteria move among nurseries and how plasmids move among bacteria.