Keep Coriander Aphids At Bay

Coriander aphid  Photo by Charles Olsen
Photo by Charles Olsen

Crops Affected
The coriander aphid (Hyadaphis coriandri Das) is a pest of umbelliferous plants, including celery, parsley, coriander (cilantro), carrots, and dill.

Identification
The coriander aphid was recently detected in Immokalee, FL. This aphid is a newcomer to Florida, which was found for the first time in North America on fennel in Orange County, and subsequently on coriander and dill in Hillsborough County in 1998. It has been found sporadically in low numbers in Central and South Florida since that time.
Coriander aphids are yellow-green in color, dusted with greyish wax. They have short, dusky, slightly swollen siphunculi (or cornicles) that are about twice as long as wide. They form dense and often damaging colonies on leaves, heads, and stems of their host plants.
In Florida, several other aphid species occur with the coriander aphid. These include the green peach aphid and the rice root aphid. Both species have siphunculi that are much longer than twice their diameter. Rice root aphids live underground.

Survival And Spread
Coriander aphids are likely native to Central Asia. Distribution includes the Mediterranean area, Central and Southeast Asia, Africa, and California and Florida in the U.S. In its native lands, the life cycle of the coriander aphid is similar to that of other host-alternating aphids and is associated with winter hosts (Caprifoliaceae) and/or summer hosts (Umbelliferae). A fundatrix (or stem mother) hatches from an egg in the spring. Her offspring are parthenogenetic, winged-female spring migrants. They colonize summer host plants in the family Umbelliferae. During the summer, there can be many generations. All individuals are parthenogenetic females and may be either winged or wingless, depending on host plant quality and crowding in the colony. If the host plant quality declines, or the colony becomes crowded, winged individuals form that can establish colonies on new plants. In autumn, parthenogenetic female fall migrants occur in response to cooler temperatures and/or short days. These return to the winter hosts where they give birth to egg-laying females. Similarly, the summer colonies produce winged males in the fall. The males also return to the winter host plants where they mate with the egg-laying females to produce the overwintering eggs.

In Florida, the overwintering part of the life cycle probably will not occur. More likely, colonies of summer forms, both winged and wingless, will persist on Umbelliferae throughout the year. To date, the coriander aphid has only been found in Florida on umbelliferous plants previously mentioned. There are records of sporadic colonies on miscellaneous hosts including horsemint, spiny pigweed, and soybean.

Management Methods
Scouting is important to detect infestations. Softer pesticides including insecticidal soaps, neonicotinoids like Admire (imidacloprid, Bayer CropScience), Provado (imidacloprid, Bayer CropScience), Assail (acetamiprid, United Phosphorus Inc.) and other chemistries including Beleaf (flonicamid, FMC Corp.), Movento (spirotetramat, Bayer CropScience) and Fulfill (pymetrozine, Syngenta) will provide good control and help reduce impact on beneficials.
Check labels as available materials may be limited because many of the host plants of coriander aphids are minor crops.

Topics: , , ,

Leave a Reply

Crop Protection Stories
CitrusNew App Helps Identify Insects, Diseases, And Nutrient Deficiencies
February 24, 2015
Spensa Technologies launches app that helps growers take control of pests and improve soil nutrients. Read More
Apples & PearsGet Ready For Brown Marmorated Stink Bug In 2015
February 23, 2015
No one can predict the future of this relatively recent invader, which is now found in 41 states, but all signs point to continued expansion. Read More
Disease ControlDon’t Let Rust Eat Away At Your Sweet Corn Crop
February 20, 2015
Learn how to ID, the survival and spread, as well as management methods for southern rust of corn. Read More
CitrusCompanion Biological Fungicide Now OMRI Listed
February 19, 2015
The biological fungicide from Growth Products is now registered for use in organic production. Read More
Crop ProtectionFMC Launches Biological Fungicide With New Mode Of Action
February 18, 2015
The broad spectrum fungicide, Fracture, is labeled for prevention and control of powdery mildew, botrytis, and brown rot blossom blight. Read More
OrganicWestbridge Receives California Approval For Organic Herbicide
February 18, 2015
SUPPRESS® Herbicide EC is a new broad spectrum, post-emergent tool for organic growers. Read More
David Holden
CitrusBiopesticides, Biostimulants Show Results In Fruits And Vegetables
February 18, 2015
From biostimulants in celery and avocado to biopesticides in citrus and strawberries, consultant David Holden conducts in-the-field research that attests to the effectiveness of biocontrols. Read More
The Latest
Apples & PearsNew Plant Growth Regulator Use Expanded
February 26, 2015
Ten more states grant registrations for Fine Americas’ new Kudos PGR. Read More
CitrusBiocontrols 2015: Exhibition Sneak Preview
February 25, 2015
We take a look inside the exhibit hall at the Biocontrols 2015 Conference & Tradeshow. Read More
CitrusNew App Helps Identify Insects, Diseases, And Nutrient …
February 24, 2015
Spensa Technologies launches app that helps growers take control of pests and improve soil nutrients. Read More
CitrusCompanion Biological Fungicide Now OMRI Listed
February 19, 2015
The biological fungicide from Growth Products is now registered for use in organic production. Read More
Crop ProtectionFMC Launches Biological Fungicide With New Mode Of Acti…
February 18, 2015
The broad spectrum fungicide, Fracture, is labeled for prevention and control of powdery mildew, botrytis, and brown rot blossom blight. Read More
David Holden
CitrusBiopesticides, Biostimulants Show Results In Fruits And…
February 18, 2015
From biostimulants in celery and avocado to biopesticides in citrus and strawberries, consultant David Holden conducts in-the-field research that attests to the effectiveness of biocontrols. Read More
Crop ProtectionNew Conference Helps You Incorporate Biocontrols
February 10, 2015
How well do you know biocontrol? The first-ever Biocontrols Conference & Tradeshow is ready to help. Read More
Apples & PearsBiopesticide Use Quadrupled From 2000 To 2012
February 4, 2015
Biopesticides are on the up and up in U.S. agriculture as confirmed by recent data from EPA. “The use of Read More
fine americas website
CitrusFine Americas Launches New Website
February 3, 2015
First major redesign in 10 years reflects company’s focus on PGR technology. Read More
Apples & PearsA Better Understanding Of Biocontrol
January 27, 2015
The Biocontrols 2015 Conference & Tradeshow will help growers and PCAs incorporate new tools into their crop protection programs. Read More
CitrusIncreased Global Trade Opportunity Equals New Threats F…
January 26, 2015
Despite expanding business abroad, Florida Agriculture Commissioner Adam Putnam says he's confident in the protocols in place to prevent entry of invasive pests and disease. Read More
Apples & PearsSurvey: Positive Indicators For Biocontrols In U.S. Hor…
January 22, 2015
Preliminary results of a survey conducted in December 2014 of more than 850 readers across six Meister Media Worldwide titles Read More
CitrusAsian Citrus Psyllid Marches North In California Citrus…
January 22, 2015
Part of one of the richest agricultural areas in the U.S., Fresno County, has been quarantined. Read More
Apples & PearsReal-World Solutions Highlight First Biocontrols 2015 C…
January 22, 2015
Topping the inaugural event's marquee are presentations on “Driving Crop Quality and Productivity Using Biocontrols” by representatives from two of the largest produce growing organizations in the country. Read More
CitrusElevated Expectations For UAV Use In Agriculture
January 15, 2015
Uncertainties aside, many believe unmanned aircraft will find a lasting place in farming. Read More
BerriesCalifornia Strawberry Commission Awarded More than $1 M…
January 14, 2015
Strawberry farmers are dedicated to finding sustainable alternatives to fumigants such as methyl bromide. Read More
Crop ProtectionGowan USA Announces Registration Of Zing! Fungicide
January 14, 2015
The fungicide is approved for use in potato, tomato, cucurbits, and onions. Read More
Crop ProtectionWeed Control Update For 2015
January 5, 2015
Staying up to date on the latest crop protection products and label changes is a job in and of itself. Read More