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
Newer strains of potato virus Y spread by aphids cause damage to the flesh of the tubers. Photo courtesy Washington State University
Crop Protection
July 18, 2016
Potato Growers: Be On The Lookout For New Strains Of Potato Virus Y
Standard measures have been typically less effective against new strains. Read More
fanned out 100 dollar bills
Citrus
July 18, 2016
Bayer Ups Bid To Buy Monsanto
Reports indicate new offer at nearly $65 billion. Read More
Dickeya early symptoms for web
Crop Protection
July 13, 2016
Dickeya: A New Potato Disease
The disease caused big losses last year; growers need to check fields for symptoms. Read More
Whiteflies on a leaf
Fruits
July 11, 2016
Exotic Whitefly On The Move In Florida
Reports confirm notorious Q-biotype species is now present in eight counties. Read More
(Photo credit: Nancy Bosold, Horticulture Educator, Penn State Extension)
Apples & Pears
July 8, 2016
Spotted Lanternfly Quarantine Expands In Pennsylvania
More townships added as small populations of the pest are found in municipalities adjacent to previously quarantined areas. Read More
potato field
Crop Protection
July 8, 2016
Public Policy Decisions And The Influence Of Dangerous Data [Opinion]
EPA needs to get back to using solid science and avoid bending to popular opinion. Read More
Neoafabraea pathogen on twig lesions at wounds caused by a mechanical harvester on 'Arbosana.' (Photo credit: Flourent Trouillas, University of California)
Disease Control
July 7, 2016
Disease Reportedly Returns To California Olive Orchards
The pathogen, which was originally reported along the coast in 2013, was recently found in the Sacramento Delta area. Read More
The Latest
Crop Protection
July 18, 2016
Early Infection Of Downy Mildew Confirme…
The pathogen has been confirmed in Michigan cucumbers in Bay County for the 2016 season. Read More
Crop Protection
July 18, 2016
Potato Growers: Be On The Lookout For Ne…
Standard measures have been typically less effective against new strains. Read More
Citrus
July 18, 2016
Bayer Ups Bid To Buy Monsanto
Reports indicate new offer at nearly $65 billion. Read More
Crop Protection
July 13, 2016
Dickeya: A New Potato Disease
The disease caused big losses last year; growers need to check fields for symptoms. Read More
Crop Protection
July 8, 2016
Public Policy Decisions And The Influenc…
EPA needs to get back to using solid science and avoid bending to popular opinion. Read More
Crop Protection
July 6, 2016
Abiotic Issues Affect Vegetable Producti…
Although most issues you face are biotic, abiotic issues can greatly impact vegetable crop yield and quality. Read More
Crop Protection
July 6, 2016
Crop Production High Tunnel iBook Now Av…
The book is designed to help growers who are beginning high tunnel production. Read More
Crop Protection
June 23, 2016
Scientists Selected To Work On Healthy H…
The four-year, $1 million program has a goal of improving the health of honeybee colonies. Read More
Crop Protection
June 15, 2016
Robotic Weeder Makes Its Debut
Developed in France, the autonomous, electric-powered, lightweight machine doesn’t compact soil and operates for up to eight hours. Read More
Citrus
June 14, 2016
Monsanto Rejects Second Bid From Bayer
Wall Street Journal reports Monsanto seeks bid increase from Bayer. Read More
Crop Protection
June 6, 2016
Bayer Teams Up With Aerospace Company To…
Collaboration with Planetary Resources is designed to arm growers with information to save water, etc. Read More
Crop Protection
June 6, 2016
Tessenderlo Kerley Opens Research And In…
Farm will allow company’s Crop Vitality division to try out materials under real world conditions. Read More
Crop Protection
June 5, 2016
How To Manage Consperse Stink Bug In Tom…
Tips to control the pest include pheromone traps, sanitation, and site selection. Read More
Crop Protection
June 3, 2016
Stockton Group Puts Stock In Crop Protec…
Industry veteran hired to help bolster global biopesticide business. Read More
Citrus
June 1, 2016
Groups Make Push To Challenge DuPont, Do…
Letter from industry organizations say proposed merger could hinder innovation, raise prices, and reduce choices. Read More
Crop Protection
June 1, 2016
5 Major GMO Myths Debunked
Disproving the myths associated with the technology and highlighting lesser-known truths may help improve public reception. Read More
Crop Protection
May 31, 2016
Study: Honeybees Collect Urban Pesticide…
Purdue research indicates pollen is consistently contaminated with not only agricultural, but urban pesticides. Read More
Crop Protection
May 31, 2016
A Preventive Approach Reduces Infection …
Conditions favoring disease development and spread have led to the establishment of early warning or forecast programs for late blight and early blight. Read More
[gravityform id="62" title="false" description="false"]