June 23, 2015

Now that you are scouting your outdoor herbaceous perennials, it is important to keep an eye out for native beneficial insects and mites. If they are present in sufficient numbers, they can do your work for you! These good guys may be either generalist predators that feed on many pests during their lifetime or more specialized host specific parasitic wasps that may parasitize aphids.

Topics: Biological Control Content Type: Update
June 10, 2015

Begin the mum season by reviewing your fertilizer program and teaching new employees to recognize symptoms of Chrysanthemum white rust.

Topics: Cultural Practices, Cultural Problems, Diseases, Plant Nutrition Content Type: Update
May 22, 2015

Plants on display in your garden center or farm stand require regular, gentle watering to maintain high quality. Watering should be completed during the daylight hours, to allow plants to dry before dark. The drying will help prevent foliar diseases. If plants are to be watered by hand, be sure to furnish sufficient time and personnel to water thoroughly. Anything less, and plant quality will decline rapidly.

Place hanging baskets in areas beside the aisles, not over aisles where water and fertilizer will drip onto customers and create a hazard.

Topics: Cultural Practices Content Type: Update
May 12, 2015

Tarsononemid 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
May 7, 2015

Symptoms of bacterial leaf spot caused by Pseudomonas cichorii on basil appear as brown and black spots on leaves and streaking on the stems. The leaf spots are angular or irregular or delineated by the small veins. The bacterium has a wide host range and infects chrysanthemum, geranium, and many other ornamental and foliage plants but is not known to be host specific. P. cichorii can be present on asymptomatic plants allowing long distance distribution of the bacterium via propagative material. On basil, seed and infected plugs are the most likely sources of infection.

Topics: Diseases Content Type: Update