April 2 snow at Rock Springs. Photo: Rob Crassweller, Penn State
The Network for Environment and Weather Applications (NEWA) IPM Monitoring system is available to any grower in PA. As in the past, you can link to the closest weather station to your orchard and utilize the weather data from that station.
Spring is slowly arriving kicking and screaming and unlike our last few springs, this year’s arrival seems more normal to the long-standing average. The Northeast Regional Climate Center phenology map for Empire shows that much of the area of the southern counties on the Maryland/West Virginia borders should be in green tip to half-inch green.
One of the new features added to the NEWA IPM Monitoring at growers’ request, was a change in the biofix and orchard characteristics. The apple diseases, apple carbohydrate thinning, and apple irrigation tools on NEWA will now save the green tip date, first blossom open date, orchard blight history selection, bloom date, petal fall date, trees per acre, and age of orchard, that you entered when last using the tool.
The disease models for apple scab, fire blight, and sooty blotch/flyspeck have been altered to save their particular biofix and orchard characteristics. The horticultural model for the MaluSim Carbohydrate thinning will now save the green tip and bloom date on the cultivar of interest. The apple irrigation model will save green tip, trees per acre, and age of orchard for the cultivar of interest. The dates and orchard characteristics cached are specific to the weather station location and the year used. The information saved is what you last entered when using the tool for that weather station and year. This information is saved locally in your browser’s cache. Local storage from your browser is not backed up, so if it is cleared (deleted), it will need to be reentered. Always keep a record of your biofix dates and orchard characteristics. We developed an Apple Biofix Record Sheet to help growers keep track of the apple disease and insect biofix information. Feel free to adapt this to benefit your operation and use of NEWA tools.
If you are operating the carbohydrate model for different blocks or cultivars, you will still need to enter the biofix values each time you change to a different block. For example, if you sent me the green tip and bloom dates for Gala and you want to run the Carbohydrate Model for Fuji which may have a different green tip or full bloom date, you will need to enter those dates each time you run the model.
With that new feature, we have received notification from three orchards in the MaluSim Carbohydrate Network of reaching green tip. This year to present uniform comparison across the state, the participants will record green tip and full bloom for Gala. We chose Gala because we felt everyone has this particular cultivar.
As of April 10, the stations that have reported green tip are listed below. I am sure that others will soon be reporting green tip soon.
|Station||Green Tip Date|
Gala flower buds April 10 at Rock Springs. Photo: Rob Crassweller, Penn State
Empire flower buds April 10 at Rock Springs. Photo: Rob Crassweller, Penn State