Michigan State University Offers Tips On Whitefly Management

Greenhouse Whitefly
Greenhouse Whitefly

Note: Michigan State University (MSU) has posted the following whitefly alert on its Extension website:

Recently, reports from the University of Florida indicate that there are now established populations of insecticide-resistant sweet potato whitefly (Bemisia tabaci) in Palm Beach County, FL.

There are two major biotypes (identical genetic strains) of whitefly: B and Q. The B biotype of whitefly has been in the U.S. for more than 30 years, while the Q biotype only became a problem within the last 10 years. The Q biotype is much more resistant to conventional control compared to the B biotype. The Q biotype has been found in cotton fields for many years, though, and their presence in the whitefly population has come and gone over the years.

A very high level of insecticide use is needed for the Q biotype to become dominant. The B biotype usually outcompetes the Q biotype and it still remains the dominant pest whitefly of greenhouse plants.

Greenhouse growers in Florida and other parts of the country should be vigilant when scouting their plant material to monitor whitefly populations. For growers opting to use insecticides to control whitefly, MSU Extension recommends several options.

Growers can also use biological control to manage whitefly populations. There are two commercially available parasitoids in the U.S.: Encarsia formosa and Eretmocerus eremicus. Eretmocerus eremicus will parasitize both sweet potato and greenhouse (Trialeurodes vaporariorum) whiteflies, while Encarsia formosa will only parasitize greenhouse whiteflies. For production during these warmer months, Eretmocerus eremicus is more effective at higher temperatures than Encarsia formosa. There are also two commercially available predators that feed on whiteflies: Amblyseius swirskii and Delphastus catalinae. A. swirskii feeds on the eggs and nymphs of whiteflies while D. catalinae feeds on whitefly eggs.

Check out the MSU story for more information.

Topics: , ,

Leave a Reply

More From Insect Control...
Growing-Media-Symposium-Tour

November 13, 2017

International Growing Media Symposium Comes to the U.S.

This International Symposium, with representatives from 21 countries, covered new market opportunities, generated innovative ideas, and offered first-hand information to more than 150 attendees.

Read More
Parasitized aphid mummies, ladybird beetle larvae

November 11, 2017

OHP Announces Two New Ornamental Pest Management Tools

OHP recently added two new crop protection tools to its profile of biosolutions: a biological insecticide, and an ornamental fungicide.

Read More
Parisitic Wasp Aphidius colemani

November 7, 2017

Growers Attending Biocontrols East Conference Got a First-Hand Look at Others’ Hands-On Experience

The greenhouse breakout during the Biocontrols East Conference provided real life, hands on experience to attendees, from a grower’s perspective.

Read More
Latest Stories
Damage to Cannabis Buds from Hemp Russet Mite

October 22, 2017

Take Control of Mites in Cannabis Crops

Mite pests have become a problem for cannabis growers. To reduce crop losses, follow these best practices for better best management.

Read More
Whitefly adult

October 13, 2017

Researchers Continue to Keep Close Tabs on Whitefly

Dr. Lance Osborne of the University of Florida and Dr. Cindy McKenzie of USDA’s Agricultural Research Service are evaluating insecticide efficacy and the impact of product rotations on whitefly biotype populations.

Read More
Biocontrols in a Greenhouse

September 4, 2017

How to Successfully Integrate Biocontrols Into Greenhou…

The widespread adoption of biocontrol in Canadian floriculture greenhouses grew out of necessity. The lessons they learned can help you incorporate these tools in your production.

Read More
Aphids On Older Leaves

August 8, 2017

OHP Launches New Insecticidal Soap, Gains New Registrat…

OHP is making two new crop protection tools available to greenhouse growers: Kopa, an insecticidal soap, and California registration for Ancora, a microbial insecticide.

Read More
Cannabis Crop Protection

July 27, 2017

Keep Pests Out of Your Cannabis Facilities

Prevention of pest introduction is the most critical first step in an effective pest management program.

Read More
Aphids

July 7, 2017

New Tools for Your Crop Protection Arsenal in the Green…

Over the past few months, crop protection companies have developed several new products designed to help you manage a wide range of insect and disease pests. Here’s a look at some of them.

Read More
Yellow Stick Card for thrips

July 5, 2017

Tips From a Top 100 Grower for Effective Thrips Control

A combination of conventional materials and biologicals can help provide season-long management of thrips in hanging baskets.

Read More
Scale on leaf nodes

July 2, 2017

Why Biological Control Fails: Encapsulation May be the …

If your biological control isn’t working for you, encapsulation could be to blame. Learn how this defensive response can cripple a biological control program.

Read More
Koppert Ulti-Mite Swirski sachet

June 21, 2017

New Tool from Koppert Provides More Effective Thrips Ma…

A newly patented sachet for the predatory mite Amblyseius swirskii is resistant to both low and high levels of humidity, helping growers combat thrips infestations.

Read More
Cannabis Seedling

May 20, 2017

Biocontrols: A Practical Option for Cannabis

With limited options for chemical pest control, cannabis growers are incorporating biocontrols into their integrated pest management programs. More education will cement this solution as a viable option in this emerging market.

Read More
Four Lined Plant Bug

May 8, 2017

Four-Lined Plant Bug Emerges as Troublesome Pest in Pen…

Four-lined plant bug damage is very characteristic: circular brown to black spots about one-sixteenth of an inch in diameter. The spots are easily mistaken for disease or frost damage.

Read More

May 4, 2017

Bayer Altus Update: Neonic Insect Control Alternative N…

Altus, a butenolide class insecticide with the active ingredient flupyradifurone, will be available beginning May 1, and is labeled for greenhouse and nursery use on ornamental plants, vegetable transplants, and indoor vegetable production.

Read More
Ambrosia Beetle

April 7, 2017

Tips On How to ID Ambrosia Beetle Damage, And How to Co…

Ambrosia beetles are often overlooked as being a primary cause of plant loss, but research and experience are proving otherwise.

Read More

February 28, 2017

OHP Launches New Ovicide/Miticide, Announces Partnershi…

Applause is a new miticide that targets eggs and immature stages of several mite species. Through the Vestaron partnership, OHP will market Spear-O, a toxin-derived bioinsecticide.

Read More
Remote Sensing Feature

February 12, 2017

Using Remote Sensing to Optimize IPM in Greenhouses

Researchers at the University of California Davis are developing advanced remote sensing technologies to automate detection of insect pest infestations in greenhouses, which could revolutionize integrated pest management practices.

Read More
Adult Thrips feature

January 25, 2017

Tips to Stay Ahead of Aphids, Mites, and Thrips

Control these persistent pests with innovative chemistries that will expand your rotation options with new modes of action.

Read More
Effective pest control

January 12, 2017

Prevention and Early Intervention: The Keys to Biocont…

Advance preparation and starting out right helps you implement an effective biocontrol program that reduces pest pressure.

Read More
Two-spotted spider mites, adults and eggs

January 10, 2017

Pest Management Workshop to Take Place in Virginia on J…

Battlefield Farms will host the workshop, which is being coordinated by Virginia Cooperative Extension and will focus on new techniques in disease and insect control.

Read More