The window for thinner applications is rapidly closing in the south central and eastern part of the state. Four day carbohydrate average balances for the most part are positive numbers representing the fact that shoot growth is rapidly increasing as shoots become net exporters and the response to thinners is more difficult.
We had optimal conditions for apple scab infections this month and it’s time to start scouting the orchard for possible infection. Fire blight symptoms have been slow due to the chilly weather over the last several weeks; however, with the warm weather this week, fire blight may become more symptomatic. Be vigilant when scouting for fire blight and prune infections as soon as possible. In addition: newly planted blocks that may be blooming need protection to prevent blossom blight right now.
As we suggested last week and early this week the temperatures and solar radiation levels are very high setting up 4 Day Average Balances that are quite negative for all the sites.
A new set of tools is currently being developed to help you manage crop pests and increase your profitability. The Integrated Pest Information Platform for Extension and Education (iPiPE) is a national Web-based IT platform that combines user-contributed pest observations and translates them to real-time pest distribution maps and forecasts of pest risk. Throughout the season iPiPE informs you about the pests and diseases in your vicinity and provides management recommendations from professionals to help you make decisions about protecting your crop. The project is funded by a USDA Food Security Program grant and involves 28 crops around the nation.
The weather has finally broken with temperatures in Adams County to be in the 80s for most of the week. Today’s run does not contain as many sites due to discrepancies in some of the data reported to Rainwise.
The codling moth egg hatch developmental model provided by SkyBit Inc., initiated on May 7 (biofix in Penn State Fruit Research and Extension Center orchards), forecasts about 5 to 10 percent egg hatch to occur on May 30 for the Biglerville area. This is an optimal timing to initiate management activities against codling moth.
The majority of the sites are showing a 4DB of slightly positive carbohydrate levels (3.07 to 15.15 g/day) to slightly negative(-2.12 to -16.32 g/day). The trend through the weekend into early next week shows positive 4DB for six of the sites.
This past week we were finally able to establish the biofixes for codling moth and tufted apple budmoth on May 07 and May 10, respectively.
Pennsylvania had a little bit of everything in yesterday’s weather – snow, rain, wind, and cold temperatures.
Please note that we have added another site in Schuylkill County in Hegins, PA.
Chemical thinning is a complex process that annually challenges the professional apple grower. In recent years, many growers have started using the MaluSim Carbon Balance Model to assist them in managing the crop load of their trees.
Generally we had the most sunshine Saturday and Sunday that we have had in over a week. Most sites are calling for a decrease in the rate of thinner
The colder than usual weather during the last two weeks is slowing the normal activities of most insects, including the most important fruit pests. However, while some fruit pests may be slower to complete their development, the current weather will not prevent potential injuries.
As a new grape season approaches, you all may be asking yourselves, “What is going to be my biggest headache this season?” As far as insects go, I would have to answer, as always, the grape berry moth (GBM). In this blog I would like to touch on the most recent research regarding the grape berry moth, as well as, other insects to scout for in your vineyards in the early part of the growing season.
According to the models, we have been in an apple scab infection period since April 27 and will continue to have favorable disease conditions through the weekend. This is an extremely important infection period since the scab spores are peaking. Be sure to get complete coverage of your trees and tank mix with a broad spectrum (EBDC or captan) for maximum protection of your trees.
More orchards have entered full bloom over the weekend. In some cases, there was as much as a week’s difference in full bloom with some cultivars.
Understanding insecticide modes of action may not be easy but following the IRAC MoA Classification for resistance management is as simple as rotating the numbers.
After a dry April, rain has crept into the forecast making conditions ideal for apple scab, fire blight, and cherry leaf spot. Other diseases to keep an eye for management are powdery mildew and bacterial spot. For those who had their stone fruit crop frozen out in April, disease management is still needed. Disease infection periods are being posted for regions in Pennsylvania and Maryland.
After an early beginning to the growing season that saw green tip stage reached on average about 18 days ahead of last year, the weather cooled off and for stations reporting full bloom as of the morning of April 30, they are only 11 to 12 days ahead of last year. Obviously frost damage to flowers and spur leaves will be a compounding factor in deciding whether and when to thin this year.
The spring weather, and its impact on the development of insects, continues to be a roller coaster ride. The Oriental fruit moth biofix (first sustained moth flights for the season) was established on April 12, the second earliest date on record.