One of the conditions observed in vineyards, that may seem alarming, is the shedding and loss of bark on loss on grape vine trunks. Cursory research shows this is not a condition to be concerned about, unless you are just growing vines for lawn ornaments. The process is a natural succession in the plant’s growth cycle. The vascular cambium, or …
Throughout much of southern Minnesota, Japanese Beetle (JB) emergence is underway. It will be several weeks before adult feeding damage becomes a concern for fruit crops, so growers have time to prepare and review pest management strategies. Adult beetles, with an appetite for >300 host plants –including several fruit crops, sweet corn, linden trees and roses, to name a few …
As if there weren’t enough trunk diseases impacting California vineyards, UC Davis Plant Pathologist Akif Eskalen has been researching a newly identified disease causing a canker on the trunk of grapevines accompanied by fruit disease/sour rot symptoms. Watch this brief interview with Akif, and read more about it disease management in American Vineyard Magazine Please thank this video’s sponsor Ranch Systems for …
University of Georgia Extension — Out in the Watkinsville Hort Farm on June 15, I noticed some Japanese beetles – the season is upon us! Below is some information that Dr. Brett Blaauw shared previously that some of you may find helpful. Let me know what ya’ll are seeing in your own vineyards – how has it compared to previous years? Japanese …
The arch nemesis pest of the California grape industry continues to spread to more grape growing areas. Vine mealybug damage not only leads to black sooty mold on grapevine leaves and clusters, but it can also transmit and spread grapevine leafroll associated viruses that have been devastating vineyards. Watch this brief interview with UCCE Kern County Entomology Advisor David Haviland …
With grapevine red blotch disease widespread across the west, what’s a grower to do with a young or old vineyard that contracts this disease? How does it impact grape yield and quality and are there ways to mitigate the detrimental effects of this disease? Watch this brief interview with the new UCCE San Joaquin County Viticulture Advisor Justin Tanner to …
Spotted lanternfly, Lycorma delicatula (White), is an invasive pest that is being watched closely in many states – not only the states with current infestations, but also areas where the insect is likely to show up next, or those with the most vulnerable crops. The most vulnerable crop is grape, so this will be of interest to many readers here. Spotted lanternfly …
A demanding management program is required to effectively control the intense insect and disease pests of bunch grapes in the Southeast. One such pest is the grape root borer (GRB), Vitacea polistiformis (Harris) (Lepidoptera: Sesiidae) (Figure 1). This clearwing moth attacks the roots of both wild and cultivated grapes, and as such, is a significant pest in Southeastern grape production. The life cycle …
I was recently asked to give a talk about foliar fertilization in vineyards by the Willamette Valley Winegrowers Group and wanted to share some of that information here. Applying fertilizers or plant nutrients to foliage has a long history, and there is an extensive number of papers published on the subject. However, it may surprise some of you to learn …
One of the diseases you need to consider soon after bud break is Phomopsis cane and leaf spot. It causes minor leaf spots, which are more evident to our eyes, but necrotic lesions cause more critical damage on shoots and rachis. It also causes berry rot; however, it is not common with wine grapes because of our spray programs. Disease …
