April 12, 2017

Foxglove aphids have been reported on Ipomoea ‘Marguerite’ and other aphids on ornamental grasses, many perennials, dahlias, zonal geraniums and tomato bedding plants. Watch for aphids including the foxglove, green peach aphids and melon aphids. Foxglove aphids tend to feed first on the underside of the lowermost leaves and then migrate to the flowers. Because foxglove aphids reproduce faster at 50˚ to 60˚ F than at 77˚ F, they are more of a problem if your crops are grown cool.

Topics: Insects and Mites Content Type: Update
April 4, 2017

Cloudy, rainy weather, cool nights and greenhouses full of plants provide an ideal environment for Botrytis. Botrytis symptoms may include leaf spots, flower blights, bud rots, stem cankers, and stem and crown rots and can be mistaken for other causes.

Topics: Diseases Content Type: Update
March 28, 2017

Tarsonemid mites including cyclamen mite and broad mite can cause serious damage to a wide range of greenhouse crops such as New Guinea impatiens, garden impatiens, dahlias, gerbera, ivy, lantana, snapdragon, verbena, zinnia, peppers and other vegetable plants.

Topics: Insects and Mites Content Type: Update
March 13, 2017

39 pounds per square foot – That’s the weight of snow I had in my yard in Ashford after the January 2011 snow and rain storms.  The Connecticut Building Code calls for a design load of 30 pounds per square foot (psf) and many greenhouses are designed for significantly less as the code assumes that the greenhouse will be heated to a minimum 50ºF during a storm.

Topics: Engineering Content Type: Update
March 8, 2017

Begin by using fresh seeds. 

If using leftover seeds from the previous year, test for germination first.  Place a specific number of seeds, such as 10, 50 or 100 on a moistened paper towel. Fold the moistened paper over the seeds and put it in a plastic bag in a warm place. Take the paper towel out and inspect the seeds twice a day, spraying with water as needed to maintain moisture around the seeds. After the usual number of days required to germinate that variety, count to see how many have germinated and calculate the percentage of germination.

Topics: Cultural Practices, General Content Type: Update