Category: Plant Pathology Efficacy

Nematodes are typically known for the damage they cause when feeding on or residing inside roots. However, they also can impact foliage. The host range of foliar and soil dwelling nematodes is wide affecting various environmental horticulture crops,

From 2008 to 2022, 83 products were tested through the IR-4 Environmental Horticulture Program as foliar or drench applications against bacterial pathogens. In addition to research collected through the IR-4 program, this summary includes

Root rots caused by Phytophthora species are often not noticed until foliar symptoms of wilting and stunting are observed. Phytophthora root rots are difficult to manage there are multiple species with differential sensitivities to fungicides.

From 1999 to 2023, 44 products or active ingredients were evaluated for Rhizoctonia solani management in greenhouse experiments as soil drench, soil incorporation, foliar or soak application, and in field experiments as soil drenches.

Powdery mildew is a highly recognizable disease with pronounced colonies of white on foliage and, for some species, on petals. Due to the high number of spored produced, powdery mildews often develop resistance quickly to fungicides.

At the IR-4 Environmental Horticulture Program Workshop in 2011, Botrytis Efficacy was selected as a high priority project to expand the knowledge and list of fungicides available to growers for these diseases.

From 2001 to 2020, numerous products representing 40 active ingredients were evaluated in greenhouse and field trials as soil drench, soil incorporation, foliar,in-furrow, drip irrigation

From 2008 to 2020, 70 products were tested through the IR-4 Environmental Horticulture Program as drench or foliar applications against bacterial pathogens.

From 2003 to 2020, numerous products representing 35 active ingredients were evaluated in greenhouse experiments as soil drenches against Thielaviopsis basicola causing black root rot