Insect & Disease ID And Diagnosis Guide: Deformities & Stunted Growth

Insect & Disease ID And Diagnosis Guide: Deformities & Stunted Growth

Seeing deformities on your crops? Take a look at these pictures to see common diseases that can lead to deformities.

Scouting tip: Use a magnifying tool to look for signs of the presence of arthropods (the pests themselves, eggs, cast skins, frass, etc.), mold, and fungal spores on the top and bottom leaf surfaces.

Crinkling and distortion of young geranium leaves can result from aphid feeding.

Distortion of the leaf outline and white scarring result from thrips feeding on poinsettia.

Distortion and stunting of young growth results from thrips feeding on immature impatiens leaves.

Downward curling impatiens leaves and stunted new leaves indicate possible broad mite infestation.

Strapped, downward curled New Guinea impatiens leaves are a sign of broad mite feeding injury.

Stunted, distorted growth with yellowing and necrosis indicate downy mildew on argyranthemum.

Stunted, hardened, downward-curled leaves at the center of an African violet signal cyclamen mite infestation.

Stunted chlorotic growth on this primula indicates INSV.

Severe, strap-like leaf distortions on new leaves after pinching are thought to result from calcium or boron deficiency.

Puckered geranium leaves with injured, chlorotic margins indicate air pollution injury caused by a faulty boiler.

Light green, downward cupping, and distorted poinsettia leaves result from multiple nutrient deficiencies, usually caused by an inadequate fertilization program.

Pale brownish lumpy swellings at the base of argyranthemum indicate crown gall.

Blasted flower buds and cone-shaped leaves may signal boron deficiency or poor growing conditions — low light levels, high temperatures, and plant crowding.

Dead leaf areas caused by downy mildew can cause leaf twisting in coleus.

Chlorotic mottling and flower distortion and stunting in a zinnia due to TSWV.

Stunted and straplike new growth on this New Guinea impatiens may indicate cyclamen mite infestation.

Leave a Reply

More From Crop Inputs...

December 4, 2017

Raker-Roberta’s Young Plants Debuts as Roberta’s Finalizes Purchase of C. Raker & Sons

On December 1, Eric Wallien of Roberta’s Inc. in Waldron, IN, officially purchased C. Raker & Sons in Litchfield, MI. The new identity of the company is now Raker-Roberta’s Young Plants, according to a Dec. 1 letter to Raker’s customers, suppliers, and business partners from Vice President Susie Raker-Zimmerman. “There have been minimal changes in management and we will be providing the same products and services on which we have built our reputation in the industry,” Raker-Zimmerman said in the letter, which also announced the name change and new logo. The sale of C. Raker & Sons was announced in September . A series of events affecting Raker’s financial situation caused the need for the operation to find an alternate solution. Roberta’s had been a customer of Raker’s since 2011, and the fourth generation, family owned grower-retailer was a fan of Raker’s commitment to quality. The agreement to purchase C. […]

Read More
Biocontrols in a Greenhouse

November 27, 2017

4 Opportunities to Educate Yourself on IPM Practices in the Greenhouse

The Michigan State University Extension floriculture team has developed four greenhouse integrated pest management sessions that will be presented at the 2017 Michigan Greenhouse Growers Expo in Grand Rapids, MI.

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
Latest Stories

December 4, 2017

Raker-Roberta’s Young Plants Debuts as Roberta’s Finali…

On December 1, Eric Wallien of Roberta’s Inc. in Waldron, IN, officially purchased C. Raker & Sons in Litchfield, MI. The new identity of the company is now Raker-Roberta’s Young Plants, according to a Dec. 1 letter to Raker’s customers, suppliers, and business partners from Vice President Susie Raker-Zimmerman. “There have been minimal changes in management and we will be providing the same products and services on which we have built our reputation in the industry,” Raker-Zimmerman said in the letter, which also announced the name change and new logo. The sale of C. Raker & Sons was announced in September . A series of events affecting Raker’s financial situation caused the need for the operation to find an alternate solution. Roberta’s had been a customer of Raker’s since 2011, and the fourth generation, family owned grower-retailer was a fan of Raker’s commitment to quality. The agreement to purchase C. […]

Read More
Biocontrols in a Greenhouse

November 27, 2017

4 Opportunities to Educate Yourself on IPM Practices in…

The Michigan State University Extension floriculture team has developed four greenhouse integrated pest management sessions that will be presented at the 2017 Michigan Greenhouse Growers Expo in Grand Rapids, MI.

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
OHP Biosolutions

September 26, 2017

OHP Acquired by AMVAC, But Will Continue to Operate As …

AMVAC has acquired OHP and its chemical and biological crop protection solutions for the greenhouse and nursery markets. The deal will close in early October, and there will be no changes to staff, products, or operations.

Read More
Hydroponics Michigan State Web

September 14, 2017

Hydroponic and Aquaponics Growers Face Possible Loss of…

The National Organic Standards Board is considering recommending that USDA revoke the ability for hydroponic, aquaponic, aeroponic, and other container-based growing methods to be certified organic, according to an update from growers at Upstart University.

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
Primula acaulis, Botrytis, Disease, Griffin Greenhouse Supplies

May 30, 2017

BioWorks Launches New Biofungicide for Botrytis Control

BotryStop was developed for the control of pathogens such as Botrytis, Sclerotinia, and Monilinia in several crops, including ornamentals.

Read More
Adult Aphidoletes in web - Feature

May 27, 2017

How to Overcome Biocontrol Challenges by Thinking Outsi…

With a little creative thinking and adjustments to your strategy, you can overcome your greenhouse biocontrol challenges.

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
Christmas Cactus

May 18, 2017

How to Increase Branching and Flower Bud Production of …

Based on research completed at North Carolina State University, here are some methods for increasing branching and flower bud production of Christmas Cactus (Schlumbergera bridgessii).

Read More
Herbicide Drift in the Greenhouse

May 15, 2017

How to Identify and Mitigate Herbicide Contamination in…

Herbicides applied off-site or within the greenhouse can significantly damage ornamental and edible crops. Beth Scheckelhoff, an Extension Educator for Greenhouse Systems at The Ohio State University, provides some examples and basic recommendations for mitigating and preventing herbicide contamination and injury in the future.

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
Bumblebees

May 2, 2017

Pollinator Update: The Bumblebee on the Endangered List…

With plenty of attention being placed on pollinator health around the country and the world, here’s what you need to know.

Read More
Florikan Space Technology Hall of Fame

April 25, 2017

Out-Of-This-World Plant Nutrition: Fertilizer Company I…

NASA scientists are growing vegetables on the International Space Station using Florikan’s controlled release fertilizer.

Read More
OHP Biosolutions

April 8, 2017

OHP Enters Biocontrols Market With New Product Line

The OHP Biosolutions program will feature insecticides, fungicides, and other products designed to address the expanding segment of growers who use biological products.

Read More
Dramm Low Volume Coldfogger Sprayer

April 2, 2017

Dramm Upgrades Its Coldfogger Low-Volume Sprayer to Imp…

Dramm recently updated its Coldfogger, a targeted low-volume sprayer, to a new model that offers a more durable pump that is easier to use and allows for the use of corrosive chemistries.

Read More

March 20, 2017

AgBiome’s New Zio Biofungicide Receives EPA Regis…

The new biofungicide is the first product from AgBiome, and will be marketed by SePRO Corp. in the ornamentals market.

Read More