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Powdery mildew on blossoms. The powdery mildew fungus likes young tissue. As tissue begins to grow, the fungus will colonize young, green tissue as it emerges. Photo: Kari Peter, Penn State
Spraying by the Numbers: Fungicide Resistance Management - Articles Articles

Spraying by the Numbers: Fungicide Resistance Management

Kari A. Peter, Ph.D., Alan R. Biggs

Growers can prevent resistance to fungicides by alternating chemicals by FRAC group also known as "spraying by the numbers." More
Brown marmorated stink bug adult and nymphs. Photo: Greg Krawczyk, Penn State
Brown Marmorated Stink Bug Management Survey for Commercial Producers - News News
A nationwide survey is currently underway to gather information from farmers and growers on the economic impact of the brown marmorated stink bug (BMSB) on agriculture. More
Sanitation will be critical for managing disease for the 2019 season. Photo: K. Peter, Penn State
Disease Update: Cleaning Up the Messy 2018 Season - News News
There were many diseases affecting tree fruit growers in 2018. Sanitation will be very important while preparing for the 2019 season. More
Leaf infected with Marssonina. Photo: K. Peter, Penn State
Apple Disease - Marssonina Blotch - Articles Articles

Apple Disease - Marssonina Blotch

Kari A. Peter, Ph.D.

Marssonina blotch, caused by Marssonina caronaria, is a foliar disease first identified in Pennsylvania in September 2017. More
Symptoms of potassium deficiency.
Assessing and Managing Potassium Concentration in the Vineyard - Articles Articles
Potassium (K) plays a critical role in many plant physiology and biochemistry processes such as photosynthesis, osmoregulation, and enzyme activation. More
Photo 1. Codling moth larvae feeding inside the fruit. Photo: G. Krawczyk, Penn State
Tree Fruit Entomology Update for the End of August 2018 - News News
Pennsylvania has experienced a combined average per location of about 20 inches of rain during the last 5 weeks. More
Tree Fruit Disease Toolbox - Fungicide Resistance Management
Tree Fruit Disease Toolbox - Fungicide Resistance Management - Articles Articles
Resistance has sometimes resulted in pest-management-program failures. Below are presented tactics to help delay resistance to fungicides. More
Photo: Worker Protection Standard (WPS) Respiratory Protection Guide, Pesticide Educational Resources Collaborative, Rev. October 2017
Respirator Fit Test - News News

Respirator Fit Test


As growers are aware, the Worker Protection Standard (WPS) requirements for handlers of agricultural chemicals have changed. More