February 3, 2010

Plant and Insect Diagnostic Clinic Update - February 3, 2010


The following are highlights and updates about samples and questions recently received in the Clinic:

 

Insects

 

Roses have hips too!


With Valentine's Day just around the corner – roses are on many people's mind. Cut roses are the perfect gift on Valentine's Day and other special occasions. Rose plants are also at

Pruning Grapevines in the Home Garden


For some home gardeners, pruning grapevines is a difficult, confusing chore. However, it's not really difficult if you understand the basic pruning principles and have the right tools. 

Grapevines produce fruit clusters on the previous season's growth. Before pruning, a grapevine may have 200 to 300 buds capable of producing fruit. If the vine is not pruned, the number of grape clusters would be excessive and the grapevine would be unable to ripen the large crop or produce adequate vegetative growth. 

Seed Catalogs


Gardeners can purchase seeds at local garden centers and mail-order companies. For your convenience, the mailing addresses and web sites of several mail-order seed companies are provided. This list has been updated for 2010. (No endorsement of companies is intended in this listing, nor is criticism implied of similar companies that are not shown.) 


W. Atlee Burpee & Co.


300 Park Avenue


Warminster, Pennsylvania 18974

Look out for Thousand Cankers Disease in Black Walnut Trees


As reported earlier, the recently-recognized disease called thousand cankers of black walnuts has not been found in Iowa or other parts of the black walnut tree (Juglans nigra) native range