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Stemphylium leaf blight (SLB) is a foliar disease of onion that causes tan, black or purple-colored target spots and leaf dieback. When uncontrolled, it results in excessive leaf dieback which causes reduced bulb size/yield and bulb quality. SLB can behave as both a primary and a secondary pathogen...

Steps for Success STEP 1: Use the highest labeled rate unless specified differently in the Guidelines (Table 1). Read the insecticide label before using the product. STEP 2: Do not apply the same active ingredient or class of chemistry (IRAC group) more than twice during the season. Table 2 lists...

Julie Kikkert (28 years) began her career in CCE in 1999 when she shared a Vegetable Specialist position with veteran Carol MacNeil (who retired in 2016 after serving 40 years for Cornell Cooperative Extension) in the Ontario, Wayne, Yates and Steuben (OWYS) Vegetable Program. In 2005, the OWYS...

To find the first thrips of the season, look deep into the leaf axils. Inspect 20 to 30 plants and count the total number of onion thrips (OT) per plant and divide by the average number of leaves per plant to get the number of OT per leaf. Thrips feeding causes silvery streaking along the leaves. If...

There are two methods to use insect exclusion netting (IEN), specifically ProtekNet, 25 g, to manage swede midge in brassicas: As a cover over top of susceptible brassicas to exclude/protect the crop from swede midge; and To include inside the netting swede midge that emerge from soil so that they...

Why should I care about food safety? We don’t want people to get sick. Certain populations are more at risk to foodborne illness such as older adults, younger children, pregnant people and people with weakened immune systems. It’s bad for business. Food illness outbreaks and recalls of produce may...

It is important to familiarize yourself with how late blight can appear in crop, and what diseases and conditions may be similar. The descriptions provide information on various potato diseases, and how their symptoms differ from late blight. Late Blight Late blight spreads during wet or humid...

How do urban soils differ? Why does this matter when interpreting soil test results? Due to a history of human land use and ongoing activities, urban soils are often compacted, contaminated or of poor quality. Because of this, many urban growers produce crops in constructed soils. Urban agricultural...

Three Categories of Cover Crops "As we discuss cover crops today, it helps to consider three major categories based on the constraints of space and time. In the case of time, we are thinking about seeding date and termination date of the cover crop, which is of course bound by the harvestable crops...