Imprelis update

I’ve been continuing to track some of the reports of injury to conifers associated with the new herbicide, Imprelis.  Interest in the problem is likely to escalate given a front page article in the Sunday’s Detroit FreePress. http://www.freep.com/article/20110710/NEWS06/107100467/New-lawn-chemical-chief-suspect-mysterious-deaths-trees

 

I visited about ten sites last week with an applicator that had used Imprelis this spring.  The landscaper was a certified applicator with about 15 years of experience with herbicides, insecticides and fungicides, who was knowledgeable about his chemicals and plants.… Continue reading this article “Imprelis update”

Hot weather and not-so-hot advice

Today I was sent a link to a posting on “droopy leaves.”  Essentially, it suggests that droopy leaves are a means to conserve water on hot days and that watering these plants causes more problems than it solves because the roots don’t get enough oxygen.  A link to the science of transpiration is provided.  The advice is to wait until the evening and if the plants perk back up, then they didn’t need water after all.… Continue reading this article “Hot weather and not-so-hot advice”

Chlorosis mystery uncovered – maybe

Sorry about the long wait in discussing the weekend’s post!  (Technical troubles with access here in BlogVille.)  In any case, many of you zeroed in on the defunct lime kiln as a possible pH adjuster.  It would have been really interesting during those years to see how materials were processed – for instance, was there a lot of lime dust that settled over the area?  Where did the limestone come from – was it carted in by train or was it local?… Continue reading this article “Chlorosis mystery uncovered – maybe”

Consternation in the You-Pick Field

It’s high season at our blueberry farm.  Each morning, the yard fills with cars (at 7:00 a.m. – aargh) and eager blueberry pickers hit our four acres of Northern Highbush berries. No late freezes, lots of hard work by our honey bees, and good rainfall have added up to a blockbuster crop.  Certainly helps with the mortgage.

Running a you-pick ( U-Pick makes me itch) farm is an …interesting experience.  Upside – you do the picking, we weigh the buckets, we take the money – $2.40/lb + tax.… Continue reading this article “Consternation in the You-Pick Field”

Interveinal chlorosis mystery

Today my family took our annual 4th of July weekend hike.  We ended up on a fairly new trail through the Robe Canyon Historic Park.  It was a gorgeous day and we saw all manner of plants and animals.  The highlight of this trail is an old lime kiln; bricks and other remnants of early settlers are scattered around the area.  The kiln closed in the 1930’s.  (The hot link embedded in the park name leads to a 2004 article about the trail and the history of the site.)… Continue reading this article “Interveinal chlorosis mystery”

What Happens to the Horticulturist?

A couple of weeks ago I had the opportunity to talk with a professor in the agronomy department who’s going to be retiring very soon.  We talked about education and field trials, corn and trees, and then we started talking about the future of our departments.  Both of us are concerned that this generation of horticulturists (and agronomists—but I’m just going to deal with horticulture here) will be the last.

Over the last 10 or so years we have been losing horticulture departments. … Continue reading this article “What Happens to the Horticulturist?”

A Garden Professor migrates east, albeit briefly

I was AWOL last week, as I had 3 presentations to get ready for 3 different states all in the span of 4 days.  Yow!  But they are over and done, and I’ll try to keep up on the blog from now on.

This is a short but amusing post (to me anyway).  My second talk was in Virginia, where I spoke to Master Gardeners at their annual conference.  The speaker right before my talk was fellow GP Holly Scoggins. … Continue reading this article “A Garden Professor migrates east, albeit briefly”

Does native matter?

We’ve had lots of lively discussion on my post regarding the Mark Davis et al. comment in Nature on natives and exotics. I have been traveling and otherwise occupied and have not had a chance to comment so I feel a little like the kid that kicked the anthill and then ran away. Fortunately, Holly was gracious enough to forego her post today (I promise to return the favor, Holly!) so I can chime back in.… Continue reading this article “Does native matter?”

Imprelis damage to landscape conifers

Herbicide issues seem to be dominating my life these days. Over the past several weeks reports have surfaced around the Midwest of landscape conifers – primarily spruces and pines – that have developed rapid and severe die-back. While there are a host of insect pests and pathogens that can cause die-back in conifers, the recent cases are noteworthy in the speed with which trees expressed symptoms.

 


Photos: Andy and Carol Duvall

In many cases that have been reported the common thread appears to be the use of Imprelis, a turf herbicide developed and marketed by Dupont.  … Continue reading this article “Imprelis damage to landscape conifers”

Excerpt from Davis et al. letter to Nature on natives vs aliens

In yesterday’s post I linked to a letter in Nature by Mark Davis and a number of other ecologists on the role and native and alien plants.  Unfortunately the journal requires a subscription.   Copyright laws prevent me from re-printing the entire article, however, below is an excerpt from the conclusion, which I think captures most of their message.

“Most human and natural communities now consist both of long-term residents and of new arrivals, and ecosystems are emerging that never existed before.… Continue reading this article “Excerpt from Davis et al. letter to Nature on natives vs aliens”