The 2016 Midwest Fruit Pest Management Guide (ID-465) is available for purchase from the Purdue Education Store. This publication replaces two previous annual publications: The Midwest Tree Fruit Spray Guide (ID-168) and The Midwest Small Fruit and Grape Spray Guide (ID-169). This guide provides pest management recommendations for commercial tree fruit, small fruit, and grape[Read More…]
Bramble Fruit
There has been some talk about the use of promalin to help overcome the damaging effects of freezing temperatures. Only a small amount of research has been conducted on this. Dr Steve McArtney showed that promalin applied after damaging freeze events could increase parthenocarpic (seedless) fruit development. Keep in mind this was only shown to[Read More…]
What is the best way to assess bud damage from cold temperatures? Drs. Tara Baugher and Jim Schupp at Penn. State University have put together a nice page with some excellent photos explaining how to assess fruit bud survival: http://extension.psu.edu/plants/tree-fruit/news/2016/assessing-fruit-bud-survival-and-crop-potential I would add that unless you find that more than 90% of your buds have[Read More…]
Frost and freeze damage was minor in small fruits and grapes. Below is a review of general guidelines for when we expect damage to buds, flowers and fruit. Developmental stage 10% kill (°F) 90% kill (°F) Apples Silver tip 15 2 Green tip 18 10 Half-inch green 23 15 Tight cluster 27 21 Pink 28[Read More…]
Early spring is a good time to make the first herbicide application of the year. There are several options for grapes, brambles and blueberries including both pre and post-emergent herbicides. In most situations, there will be some emerged weeds present in the planting at this time of the year. That means a post-emergent herbicide will[Read More…]
March is a good time to finish pruning summer-bearing brambles. Last years fruited canes should be removed now if they were not removed last summer or fall. Remove weak or spindly floricanes and thin to 4-6 canes per foot of row. Laterals on blackberries and black and purple raspberries should be trimmed back to about 2/3[Read More…]
The most important spray of the season for control of anthracnose on brambles is the delayed dormant spray of lime sulfur, Sulforix or copper hydroxide. If you have a problem with anthracnose, this is one spray that you can’t afford to miss. One of these materials should be applied when new leaves are exposed 1/4[Read More…]