California Leafy Greens Pest Update

California leafy green growers have some good news: No critical diseases are on the radar for the current growing season, and according to Surendra Dara, strawberry and vegetable crop advisor and affiliated IPM advisor for the University of California (UC)-Cooperative Extension, there wasn’t much pressure outside of the usual suspects — thrips, Western flower thrips, leaf-miners, and aphids — this season, either.


Dara mentions however, the presence of garden symphylans in leafy greens. The symphlan is a soil arthropod that resembles a tiny centipede, and has been seen in areas including Davis, Sacramento, and Ventura.

The symphylan, he explains, is an irregular pest as far as when and where it appears, making it difficult to monitor and evaluate management options. Enough research has been done, though, to identify a few basic traits.

The pest attacks the plants roots, which leads to retarded growth and plant death. According to UC-Davis IPM research, the symphylan is only a problem in fields that were not fumigated, or fields where fumigation
was ineffective.

As far as symptoms for growers to look out for, Dara explains that they might vary from crop to crop.

“It also depends on the stage [of plant development]. With the younger plants, the plant just dies; and if it is an older one, it shows as a weakening of the plant.”

Treating Garden Symphylan
According to Dara, crop protectants may be applied to the soil preventively, but if the infestation occurs too late in the season growers cannot apply certain controls as it will be too close to harvest.

“For example, chlorpyrifos is one of those chemicals that is applied only at the time of planting, or very early in the season,” he says.

The Usual Suspects
Aside from the garden symphlan, the typical leafy greens pests as mentioned previously, need to be monitored.

“They could be a major issue if you don’t monitor and control them in time, but usually the leafy greens growers take care of them with regular monitoring and chemical applications,” he explains.

Dara recommends sustainable ways of controlling these pests, such as crop rotation, implementing GAPs, and following IPM recommendations.

“For example, if growers are spraying chemicals, they should rotate those with different modes of action instead of using the same ones again and again to reduce resistance,” Dara says. Additionally, they should consider incorporating non-chemical alternatives in their IPM program.

Keeping up with fundamental strategies like GAPs and IPM will help make the plants stronger, and better able to withstand pest or disease damage, he adds.

Click on the next page to continue reading…

Topics: ,

Leave a Reply

Leafy Vegetables Stories
Crop Protection
March 10, 2017
Nematicide Now Available in California, Arizona
Velum One from Bayer also suppresses foliar diseases, increases yields. Read More
Crop Protection
March 9, 2017
New Organic Seed Treatment for Spinach
Germains Seed Technology launches ProBio SafeGuard that will be distributed through Holaday Seed Company. Read More
Leafy Vegetables
March 8, 2017
The Dos and Don’ts of Growing Greenhouse Vegetables
Thinking of adding growing vegetables under cover? Here are a few things you need to consider first. Read More
Disease Control
February 23, 2017
Spot Sclerotinia Before It Stops Your Vegetable Crop
Learn how to identify, the survival and spread, as well as management methods for this malady that goes by many names. Read More
Business Planning
February 15, 2017
Are Retailers Your New Competition?
Target will be following a trend that is already under way in Germany and China: offering shoppers greens that are grown right there in the store. Read More
Leafy Vegetables
January 30, 2017
Researchers Identify 8 Spinach Varieties With Additional Health Benefit
Scientists analyzed hundreds of spinach plants to find ones with less oxalate, a compound linked to kidney stones. Read More
Leafy Vegetables
January 30, 2017
The Secret to Expanding Your Acreage? Partners
Uesugi Farms increases 50-fold through smart alliances. Read More
Stemphylium leaf spot of spinach
Disease Control
January 20, 2017
Don’t Let Stemphylium Leaf Spot Stump Your Spinach Crop
Learn how to identify, the survival and spread, as well as management methods for this vegetable disease. Read More
Crop Protection
January 10, 2017
New Research May Help in the Fight Against Insect-Transmitted Viruses in Vegetables
The findings depict the first time that a viral effector protein has been seen as attracting insect vectors to feed on plants through odor.  Read More
Crop Protection
January 5, 2017
Labor, Efficiency, and the Future of Weed Control
Increases in labor costs will affect the costs of production of vegetable crops in California, so growers will have to take advantage of production practices that help reduce weed pressure. Read More
Crop Protection
January 5, 2017
Scientists Aim to Improve Nitrogen, Water Use Efficiency in Lettuce
Genetic research intends to develop varieties with enhanced nutrient uptake. Read More
Florida Everglades swamp
Leafy Vegetables
December 21, 2016
BMPs Key to South Florida Water Quality Success
Growers, researchers working to reduce phosphorus loads in Everglades Ag Area. Read More
December 20, 2016
3 New Fungicide Product Options for Vegetable Growers
Unique modes of action the main feature of modern chemistries. Read More
Crop Protection
December 6, 2016
Scientists Aim To Improve Nitrogen, Water Use Efficiency In Lettuce
Genetic research intends to develop varieties with enhanced nutrient uptake. Read More
Food Safety
November 21, 2016
New Study Shows Pre-Cut Salad Fosters Growth Of Salmonella
A new study shows minimal damage to salad leaves in bagged salads stimulate the presence of Salmonella enterica. Read More