Features Ag News Elsewhere  (fresh daily from the Web)

Weed and caterpillar control

By John Fulton       Send a link to a friend

[MAY 14, 2004] 

Broadleaf weed control

Everyone seems to have been waiting for warmer temperatures and the appointed date to begin broadleaf weed control programs. Well, that time has arrived! The first item of business is to know what type of weeds you want to control. This will make a big difference in what product or products you select.

The main products used for broadleaf weed control in lawns are 2,4-D, MCPP, dicamba, a combination of those three products and triclopyr. Let's start with the triclopyr since it's probably the easiest to discuss. Its place in weed control is for violet control. It is death on violets. It can be added to one or more other chemicals to provide broad-spectrum control.

The old standby is 2,4-D. It is good on carpetweed, chicory, dandelion, lamb's-quarters, plantains and wild carrot. MCPP is good on chicory, lamb's-quarters and white clover. Dicamba is good on black medic, chickweeds, chicory, dandelion, dock, henbit, knotweed, lamb's-quarters, pearlwort, purslane, red sorrel, thistles, white clover, wild carrot and yarrow. The combination of all three products will pick up all of those listed for the individual products, plus a few more such as mallow, speedwell and wild onion. The combinations are sold under many different trade names, so check the active ingredient list for ones you need.


[to top of second column in this article]

My annual disclaimer for application of these types of products is: "Beware of potential drift from these products." Not only can the spray move under windy conditions while you are spraying, but particularly with dicamba the product can drift as a vapor for up to two weeks after spraying with hot and humid conditions.

Eastern tent caterpillars

Egg hatch has been completed for the Eastern tent caterpillar's first generation. These are the larvae that get about half an inch long and move outside of the tent to feed. During cool nights the larvae all go back to the tent and the entire mass can be removed. Sprays of Bt, or most insecticide sprays, will control the small larvae.

The other name for these caterpillars is "ugly nest caterpillars." The name is most appropriate. There are two generations per year, and the one in the late summer to fall gets most of the attention. That generation can strip most of the leaves off small trees in heavily affected areas. The good point is that leaves that time of year aren't very efficient producers of food, so the end result is a slightly weakened tree that also is very bare.

[John Fulton,
Logan County Extension office]

Previous articles by John Fulton

Logan County Fair

Back to top


News | Sports | Business | Rural Review | Teaching & Learning | Home and Family | Tourism | Obituaries

Community | Perspectives | Law & Courts | Leisure Time | Spiritual Life | Health & Fitness | Teen Scene
Calendar | Letters to the Editor