May 5, 1995

Trellis Construction

Grapevines can be supported and trained to a variety of structures. In the home garden, structures range from the decorative arbor to the conventional trellis.

Construction of a grape trellis is similar to constructing a farm fence. The trellis must be substantial enough to carry the weight of the vines plus a heavy crop during high winds. Basically, the trellis consists of 1, 2, or 3 wires stretched tightly and secured to firmly set posts.

Must Producers Post Fields Under WPS?

In most cases, fields do not have to be posted under the Worker Protection Standard. Review the Agricultural Use Requirements box on the pesticide label to determine if posting is required. The majority of pesticides do not have a posting requirement.

Even if the label requires posting, you do not have to post if:


Free Worker Protection Standard Publication

Training manuals and safety posters are among the free Worker Protection Standard publications you can order from ISU's Extension Distribution office.

The complete details of the Standard are contained in PAT-12, The Worker Protection Standard for Agricultural Pesticides--How to Comply manual. This EPA manual provides the information you need to comply with the federal standard that went into effect January 1, 1995. Every employer of agricultural crop production workers and pesticide handlers should have one.

Hortline Hours

Hortline hours from May through August will be from 9:00 a.m. to 5:00 p.m., Monday through Friday. Student interns will be helping answer calls during this period. The extended hours will hopefully give clients greater access to Hortline.


This article originally appeared in the May 5, 1995 issue, p. 58.

Pine Tree Insect Pests

May is an important month in the control of insect pests of pine trees. Pine needle scale, a common but variable pest, could still be controlled in the egg stage with a dormant oil spray before bud break (an unusual situation but a possibility in "late" springs like this one), though more typically we think of May as the time to control the crawler stage.