Rainfastness of Insecticides and Fungicides on Fruit

This article was co-authored by Kristy Grigg-McGuffin, OMAFRA Horticulture IPM Specialist In view of the frequent heavy rains in many regions this season, understanding rainfastness, or the ability of a pesticide to withstand rainfall, is important to ensure proper efficacy. All pesticides require a certain amount of drying time between application and a rain event. […]

Read More… from Rainfastness of Insecticides and Fungicides on Fruit

What’s with dew? – Tips with Tom #9

Tips with Tom - Title

When warm air is cooled, it loses some of its moisture-holding capabilities. This change often occurs at night, when plants (and other objects) cool. Once the temperature of the surface of the leaves, for example, drops below the dewpoint, it causes water to condense, forming the shiny dew that causes so many to question early […]

Read More… from What’s with dew? – Tips with Tom #9

How Airblast Spray Droplets Behave (or Misbehave)

Some pesticide labels require or prohibit certain droplet sizes to reduce the potential for drift. But, even when labels are silent about size restrictions, operators should be aware of the potential for droplet size to affect coverage. In the case of airblast, droplets should be: large enough to survive evaporation between nozzle and target. small […]

Read More… from How Airblast Spray Droplets Behave (or Misbehave)

Diagnosing Airblast Coverage

Assuming there are no mechanical or maintenance problems, water-sensitive paper can be used to diagnose sprayer performance. Go here to read more about water-sensitive paper. Interpreting the results and knowing what changes to make is the critical part of the process. Observing no coverage, or a sodden paper, make for obvious conclusions… but what about everything in between? Here […]

Read More… from Diagnosing Airblast Coverage

Spraying Sweet Corn

Jacto in Sweetcorn (Hamilton)

This article was written with information from George Hamilton, Field Extension Specialist with New Hampshire Cooperative Extension (retired), and from Dr. Ben Werling, West Michigan Vegetable Educator with Michigan State University Extension. Commercial sweet corn growers must use spray application equipment capable of depositing spray material at the ear zone. These producers often hail from […]

Read More… from Spraying Sweet Corn