Category: IPM

By Terence Bradshaw As we settle into summer, it’s time to shift our focus from weekly scab management to insects, and one disease in particular. Codling moth (CM) trap captures around the state declined last week, which indicates that the first generation flight has subsided. But it’s not the adult moths that we worry about,…

By Terence Bradshaw By now, you should have thinned shoots down to 4-6 per foot of cordon length, and spaced them evenly through the canopy. Growing shoots are beginning to lignify at the base, which makes combing possible (and timely). Combing the canopy on high-wire training systems by manually separating shoots and pulling them down…

By Terence Bradshaw The near-daily rain the past week hasn’t amounted to much accumulation, so any protective fungicides applied during the narrow low-wind window of June 10-11 are likely still present on the surface of leaf tissues. However, plentiful moisture plus the warm, sunny weather on tap the next few days and grapes’ propensity for…

By Terence Bradshaw After the past week of rain I expect any remaining apple scab ascospores to have been released. Maintain fungicide coverage through the next week or so, and check orchards methodically for scab lesions to determine if you’re really done managing the disease for 2016. Summer diseases, particularly sooty blotch and fly speck…

By Terence Bradshaw This joint apple/grape notice is in reference to the amount of rain that fell Sunday. Rainfall amounts at all NEWA stations in Vermont were between one and two inches, and closer to the latter. Most pesticides can be considered completely depleted by two inches of precipitation, so we can assume that most…

By Terence Bradshaw Vines are growing rapidly in Vermont, we have shoots over 16” in the UVM vineyard, and we will be approaching the ‘immediate prebloom’ period when phomopsis, black rot, powdery mildew, and downy mildew are al active. Rain is expected Sunday June 5-Wednesday June 8, and low winds are expected tomorrow, June 4.…

By Terence Bradshaw June 3, 2016 By now all orchards should be past petal fall and many fruit are sizing up into the 10 mm range. There are a number of factors to consider in the week ahead. Rain is expected Sunday through Wednesday of next week. Apple scab should still be protected against. Even…

By Terence Bradshaw http://northerngrapesproject.org/wp-content/uploads/2016/06/June-2016-News-You-Can-Use-Disease-and-Insect-biology-and-management.pdf News You Can Use Grape Disease, Insect, and Mite Control and Biology June 2016 A single grape phylloxera leaf gall (left), with the side of the gall opened to show adult female and many yellowish eggs (photo by J. Ogrodnick) and anthracnose lesions on grape berries (right) (photo by W. Wilcox).…

By Terence Bradshaw Apologies if pictures don’t come through in this message, attached photos may be found in the corresponding blog post: http://blog.uvm.edu/fruit/2016/05/28/vineyard-management/ Grapes are moving fast in Vermont vineyards, with most cultivars in the UVM vineyard at about 3” shoot growth. Shoot thinning now will give best results before the vines waste energy on…