disease

Gray, fuzzy mold visible to the naked eye on a geranium leaf

Managing cool-season diseases in ornamental greenhouse production

Winter greenhouse conditions are marked by lower light levels, cooler temperatures and higher humidity, creating an environment where many pathogens t... more »

Close up of green leaves showing yellow and brown disease spots on the leaves

Spring forward, pest-free

Spring typically marks the busiest and most challenging season for ornamental growers. Many operations have a large variety of plants in production, w... more »

2024 Pest & Disease Report for greenhouse growers

Pest and disease pressures vary seasonally, so GPN counts on industry feedback and support from growers, trial gardens, breeders and more to stay info... more »

GPN's Pest and disease survey marketing graphic

GPN’s Annual Pest and Disease Survey needs your input

Pest and disease incidence is just a part of the growing experience. It's something that needs constant attention and management or critical parts of ... more »

HRI redirects $250K for Phytophthora research

The Horticultural Research Institute (HRI) announced that $250,000 in federal funds have been reallocated to address the growing threat of Phytophthor... more »

Plant breeding and pest management considerations for growers

The production of horticultural crops through plant breeding is important so that new plant varieties or cultivars are available to consumers who dema... more »