August 23, 2006

Plant Disease Clinic Update - August 23, 2006

Samples with the following problems have been seen in the Plant Disease Clinic recently:

Anthracnose on hosta

Anthracnose on oak

Apple scab on crabapple

Micronutrient Deficiencies of Trees

What are micronutrients?

Micronutrients are mineral elements that are essential for growth of plants, but they are only needed in very small quantities. Micronutrients include iron, manganese, zinc, copper, boron, silicon, and molybdenum. These are in contrast to macronutrients (nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur), which are required in much larger amounts and make up a larger proportion of the plant tissue.

Harvesting and Storing Apples and Pears

In order to obtain the highest quality fruit, apples and pears must be harvested at the proper stage of maturity. Once harvested, proper storage is necessary to maximize storage life.