It's one of the most beautiful, incredible images of a leafcutter bee we've ever seen. Talented...
An amazing image of a leafcutter bee carrying a leaf segment back to her nest. This image, used with permission, is by Donna Sanders of Emerald, Queensland, Australia.
A male leafcutter bee, Megachile spp., on rock purslane, Calandrinia grandiflora, in Vacaville, Calif. The seventh annual International Pollinator Conference is set Wednesday, July 17 through Saturday, July 20 in the UC Davis Conference Center. (Photo by Kathy Keatley Garvey)
A male leafcutter bee, Megachile spp., peers over a rock purslane petal. (Photo by Kathy Keatley Garvey)
In a recent post about lemon shape being affected by high temperatures
a grower sent an image of what I thought was a blurred view of something that was circled. I responded saying that I couldn't make it out, and a better image should be sent.
The grower resent the image, but this time it was about the long yellow thing in the background that was being asked about. The tree is planted next to a chile pepper plant and the question was whether the shape was affected by the chile proximity.
The grower had never seen anything like it before and I haven't either. But rack it up to the high temperature wave during flowering and the rapid fruit growth period and hormones gone amuck. if temperature extremes become more common, unusual fruit shapes will likely become more common.
The Häagen-Dazs Honey Bee Haven is the place to "bee" on Saturday, March 30 for youngsters who...
Gardening tools for youngsters at the UC Davis Häagen-Dazs Honey Bee Haven, located on Bee Biology Road, west of the central campus. A Junior Bee Gardeners' Day is set from 9 a.m. to 10:30 a.m. on Saturday, March 30. (Photo by Kathy Keatley Garvey)
A six-foot-long ceramic and mosaic sculpture, "Miss Bee Haven," anchors the Häagen-Dazs Honey Bee Haven. It is the work of self-described "rock artist" Donna Billick of Davis. (Photo by Kathy Keatley Garvey)
Children enjoying the Häagen-Dazs Honey Bee Haven. (Photo by Kathy Keatley Garvey)
This sign greets Junior Bee Gardeners at the Häagen-Dazs Honey Bee Haven on Bee Biology Road, UC Davis. (Photo by Kathy Keatley Garvey)
Have you listened to a Growing the Valley podcast? Here are a couple you might want to check...
I've recently had a number of calls concerning an increasing amount of leaf blotch on strawberry. This makes sense, since we've had continuing rains and the subsequent lengthy periods of free moisture coupled with the warming weather ideal for propogation of this pathogen.
For those unfamiliar with this disease, it is caused by the fungal pathogen Zythia fragaraiae. The disease appears as tan to gray blotches often occurring at the margins of the leaves, and one tends to see more disease on the older leaves than the younger ones. The blotches are irregular in shape and can cover pretty well the whole leaf and spread to the fruit calyces in advanced cases. A diagnostic feature of the disease are tiny brown to black fruiting bodies nestled within the blotches. These are the fruiting bodies of the pathogen which produce the spores to spread the disease around.
The call has always been that this is a minor disease, and not worthy of taking any action beyond keeping an eye on it. Personally, outside of minor marketable fruit loss to the unsightly brown calyces, I have yet to see major plant damage, much less total plant loss to this pathogen. That is not to say that it won't happen, and our new small fruit plant pathologist Akif Eskalen asks that I mention here how a minor disease could get to be a major issue when the right environmental conditions come up, that is to say, this year.
I couldn't agree more with Akif that the problem of leaf blotch could someday and sometime be serious, so we are developing a competence on it. Akif already has a bunch of Zythia samples that I sent to his laboratory for fungicide sensitivity analysis (in other words which materials offer promise and which ones don't). Currently he has them ID'd by DNA analysis and will soon proceed to test them.
So, while I still would not be overly concerned about Zythia on strawberry right now, it nevertheless serves our purposes to be ready should it ever be a problem. And that is exactly what we are doing.
Leaf blotch caused by Zythia fragariae in strawberry. Note the purple margin on the edge of the blotch.