Chrysanthemum white rust has been officially confirmed in Connecticut. Given the wet weather this year, it is very important to carefully scout your crops, especially before shipping.
The message posted June 11th on the New England Greeenhouse Update Website has been updated and contains information on identification, varieties infected in past, prevention and what to do if your mums have this disease. Here is the direct link:
http://www.negreenhouseupdate.info/index.php/search-form/392-chrysanthemum-white-rust
Two Spotted Spider Mites – with the increase in temperatures, more spider mites and their damage are appearing, both on herbaceous perennials and pot crops. Spider mites have been observed on Buddleia, Chelone, Filipendula, hardy geraniums, Hibiscus, and Papaver to name a few. Look for stippling on the upper surface. On thicker leaved plants, symptoms may resemble a nitrogen deficiency as leaves turn yellow in color, as chlorophyll is removed when the spider mites feed.
Fortunately, there are a number of miticides that work well. If spray coverage is difficult, consider translaminar miticides such as Avid, TetraSan, Pylon or Judo that will move thru the leaf. Read the label carefully regarding plant safety precautions before applying.
Commercially available predatory mites active against spider mites include the fast acting Phytoseiulus persimilis and the slower acting Neoseilus californicus.
Silverleaf whiteflies on poinsettias are starting to appear. Scout your crops carefully (using both yellow sticky cards and foliar inspections). For suggestions on treatments, see
Q Biotype Page at http://www.q-biotypewhiteflies.com/
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| 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. |
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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.