- Timing is everything when it comes to effective pest management. Knowing when a pest is susceptible to which kind of pesticide is the key for successful control. Coupled with OBLR phenology, Dr. Jones identified four windows in time when OBLR control is effective: 1) 90 degree-days (DD) – larvicide application, when overwintering larvae are becoming active in spring, 2) 720 DD – ovicide application (e.g. oil), when eggs of the first summer generation are being deposited, 3) 900 DD – larvicide + oil application, when eggs and young OBLR larvae are abundant, and 4) 1800 DD – larvicide + oil application, when eggs and young OBLR larvae of the second summer generation are abundant.
- Cracking is one of the of the primary cull factors in sweet cherry production. There are two causes of cracking: rain-induced and plant internal-water-induced (internal-water) cracking. Rain-induced cracking is more common and is characterized by cracking in the stem-bowl or tip. Rain-induced cracking occurs when water is osmotically absorbed into the fruit from the fruit surface. Internal-water cracking is caused from excessive soil water being transported to, and accumulating in the fruit. Side cracking is often a symptom of internal-water cracking but can also be symptomatic of rain-induced side cracking if a water droplet collects between two adjacent fruit.
- Weed size is a significant factor influencing the management of weeds with foliar applied herbicides. Larger weeds are notoriously difficult to control, as compared to smaller-sized plants. Herbicide escapes can compete with the current crop by competing for light, nutrients, and water. Weed escapes can also affect crop performance in following seasons via the seeds that they contribute to the soil seedbank.
- With the large number of fire blight infections last year plan as if fire blight is in your neighborhood this year. Time will tell in the next week or so if conditions will be favorable during bloom. But I think this year it is important to be prepared for high pressure. Using biologicals as part of your integrated program for conventional or organic is an important tool to help reduce the build up of the pathogen in flowers. Consider using Blossom Protect (Aureobasidium pullulans, yeast) or Bloomtime biological (less russet risk). When using Blossom Protect make sure to follow these tips.
- Pear psylla control is becoming increasingly difficult, especially in regions of the Pacific Northwest like the Wenatchee Valley where pear orchards dominate the landscape. In high pressure locations, an important factor in pear psylla control is delaying their immigration and egg laying in the early spring. WSU recently tested a number of products for repellency. Results are reported here.
- Drs. Bruce Barritt, Ines Hanrahan and Mr. Tom Auvil describe WA38 'Cosmic Crisp™' cultivar characteristics, tree handling, rootstocks, pollination, thinning, the issue of stem punctures, stem clipping, fruit size, shape, color and post harvest performance.
- An evaluation of the use of photoselective anti-hail netting is underway to reduce sunburn and improve productivity of 'Honeycrisp' apple in trials a commercial orchard in Quincy, WA. This video describes the methods used and preliminary observations.