Greenhouse Update
June 26, 2009
Leanne Pundt, Extension Educator, University of Connecticut 
  

Garden Mums
The continual wet weather has made it challenging to keep up with the high fertility needs of this crop.  In the first month, it's important to keep plants well fertilized and properly spaced.  Combining liquid with controlled release fertilizer often results in the highest quality crops. 

Excessive rain can lead to overwatered media and root rot diseases on outdoor grown garden mums. Scout for root and crown rots caused by Pythium, and Rhizoctonia.  Preventative drenches may be needed.  

Scout for bacterial leaf spots on susceptible varieties if the weather stays warm and wet. The grower's best defense against bacterial leaf spot is to space the plants well and avoid growing susceptible varieties.  

Look for signs of chrysanthemum white rust. For more information see the Yoder Chrysanthemum White Rust Bulletin. http://www.yoder.com/ASSETS/E5705D12F42B4ED7A50627CA6288FB43/08177_CWR_Bulletin.pdf

Slugs

Baits are often used, but a concern is their safety to pets and wildlife. Sluggo is a slug bait that is a blend of an iron phosphate active ingredient, originating from soil, with slug and snail bait additives.  It is also used as an ingredient in fertilizers.  The bait which is not ingested by snails and slugs will degrade and become a part of the soil. It can be safely used around pets and wildlife.

Sluggo is attractive to slugs and snails, luring them from their hiding places and plants.  Ingestion, even in small amounts, will cause the slugs to stop feeding.  This gives immediate protection to the plants, even though the slugs may remain in the area.  After eating the bait, the slugs and snails cease feeding, become less mobile and begin to die within three to six days.  Dead slugs and snails may not be visible as they often crawl away to secluded places to die.  Formulations are available for both the homeowner and commercial grower and can be used around home lawns, gardens, greenhouses, outdoor ornamentals, vegetable gardens, fruits, berries, citrus, crop and seed plants. 

 


Previous UConn IPM Greenhouse Updates - 2009

May 13, 2009
April 28, 2009
April 8, 2009
March 23, 2009
February 4, 2009

New England Greenhouse Update now online. University Extension Specialists in New England, in conjunction with USDA's Northeast Sustainable Agriculture Research and Education, contribute information to this new website. Timely updates are provided for commercial growers of greenhouse crops and flowers in Massachusetts, Connecticut and Rhode Island. You can use this additional resource for more information about current observations and recommendations on environmentally safe production practices.



GREENHOUSE IPM COORDINATOR
(commercial interests and growers)
LEANNE PUNDT 860-626-6240
. . .

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Information on our site was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.

The information in this material is for educational purposes. The recommendations contained are based on the best available knowledge at the time of printing. Any reference to commercial products, trade or brand names is for information only, and no endorsement or approval is intended. The Cooperative Extension system does not guarantee or warrant the standard of any product referenced or imply approval of the product to the exclusion of others which also may be available.All agrochemicals/pesticides listed are registered for suggested uses in accordance with federal and Connecticut state laws and regulations as of the date of printing. If the information does not agree with current labeling, follow the label instructions. The label is the law.Warning! Agrochemicals/pesticides are dangerous. Read and follow all instructions and safety precautions on labels. Carefully handle and store agrochemicals/pesticides in originally labeled containers immediately in a safe manner and place. Contact the Connecticut Department of Environmental Protection for current regulations.The user of this information assumes all risks for personal injury or property damage.Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Kirklyn M. Kerr, Director, Cooperative Extension System, The University of Connecticut, Storrs. The Connecticut Cooperative Extension System offers its programs to persons regardless of race, color, national origin, sex, age or disability and is an equal opportunity employer.

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