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
Microscope research
Crop Protection
December 4, 2016
Bio Huma Netics Opens New Lab Facility
Facility to improve quality control and help expand product line. Read More
2016 Florida Ag Expo tomato variety field tour
CEU Series
December 1, 2016
CEU Series: Back A United Front To Fight And Defeat Pests
Coordination and integration are key factors to any successful crop protection battle plan. Read More
This watermelon seedling is showing Fusarium wilt symptoms. The first symptom that appears on infected plants is wilt in a single leaf or a single vine.
Photo credit: Kathryne Everts
Crop Protection
November 30, 2016
The Effect Of Soil Fertility On Fusarium Wilt In Watermelon
Ongoing research sheds light on the role soil health plays in the severity of the deadly pathogen. Read More
sprayer nozzles
Citrus
November 29, 2016
Review Shows Low Risk To Aquatic Invertebrates From Neonicotinoids
Peer-reviewed evaluation of more than 100 studies finds uses of imidacloprid are unlikely to harm aquatic invertebrate communities, or the birds and fish that rely on them. Read More
Closeup of Q-biotype or B-biotype whitefly
Crop Protection
November 29, 2016
Tackle Whiteflies Head On
Reported in outdoor landscapes this year, vegetable growers must be prepared to mitigate the spread of the Q-Biotype. Read More
Using attractants such as wildflower mixes and shrubs ensures that bees have access to a steady source of flowering plants to keep them on your farm even during the off season.  Photo credit: Rachael Long
Crop Protection
November 28, 2016
Attract Pollinators To Your Farm
Learn how to build the optimal breeding ground for bees. Read More
Bacterial soft rot has proven to be a challenge for southeastern growers. Photo credit: Jason Chandler
Crop Protection
November 28, 2016
Stave Off Sweet Potato Disease
Management can be made easier through variety selection and improved sanitation practices. Read More
The Latest
Crop Protection
December 6, 2016
New Fact Sheet Analyzes Weed Seeds And T…
Topics covered include how weed seeds travel, when they germinate, and ways they can be eliminated. Read More
Crop Protection
December 6, 2016
Scientists Aim To Improve Nitrogen, Wate…
Genetic research intends to develop varieties with enhanced nutrient uptake. Read More
Crop Protection
December 6, 2016
Orondis Opti Fungicide Receives Registra…
The product provides control of Oomycete diseases in vegetables and other specialty crops. Read More
Crop Protection
December 4, 2016
Bio Huma Netics Opens New Lab Facility
Facility to improve quality control and help expand product line. Read More
Crop Protection
November 30, 2016
The Effect Of Soil Fertility On Fusarium…
Ongoing research sheds light on the role soil health plays in the severity of the deadly pathogen. Read More
Citrus
November 29, 2016
Review Shows Low Risk To Aquatic Inverte…
Peer-reviewed evaluation of more than 100 studies finds uses of imidacloprid are unlikely to harm aquatic invertebrate communities, or the birds and fish that rely on them. Read More
Crop Protection
November 29, 2016
Tackle Whiteflies Head On
Reported in outdoor landscapes this year, vegetable growers must be prepared to mitigate the spread of the Q-Biotype. Read More
Crop Protection
November 28, 2016
Attract Pollinators To Your Farm
Learn how to build the optimal breeding ground for bees. Read More
Crop Protection
November 28, 2016
Stave Off Sweet Potato Disease
Management can be made easier through variety selection and improved sanitation practices. Read More
Citrus
November 22, 2016
Arysta Partners With Beem Biologics To L…
Agreement to expand Arysta’s portfolio with new biocontrol releases. Read More
Crop Protection
November 21, 2016
Syngenta Announces New Fungicide Product…
The Miravis brand contains a new active ingredient that is currently pending EPA approval. Read More
Citrus
November 21, 2016
EPA Extends Comment Period For Malathion
Growers have the opportunity to comment on a draft of human health risk assessment. Read More
Crop Protection
November 8, 2016
The Effect Of Soil Fertility On Fusarium…
Ongoing research sheds light on the role soil health plays in the severity of the deadly pathogen in watermelon crops. Read More
Crop Protection
November 1, 2016
Soil Health Roadmap Makes The Case For I…
The plan sets the framework to achieve widespread adoption of adaptive soil health systems on more than 50% of U.S. cropland by 2025. Read More
Crop Protection
October 31, 2016
Zika And Zucchini Yellow Mosaic: Analog…
While we certainly do not equate the seriousness of Zika with agricultural problems, the Zika virus can serve as a reminder about aspects of the many plant-infecting viruses, from alfalfa mosaic to zucchini yellow mosaic, that affect vegetables. Read More
Crop Protection
October 25, 2016
New Technique Promising For Controlling …
Spray rigs are designed to increase efficiency while still controlling targeted pests. Read More
Crop Protection
October 25, 2016
Vegetable Grafting Facility Gears Up For…
The Tri-Hishtil vegetable grafting facility in North Carolina hopes to double grafted plant production by next year. Read More
Crop Protection
October 18, 2016
Luna Fungicide Now Registered In Califor…
Luna label expansion in California gives fruit and vegetable growers a new option for broad-spectrum disease control. Read More