New England Apple Decision Support System maps (experimental)

Note: phenology is not taken into account when producing these maps, only if weather conditions are favorable for disease/insect development. The first image in each row is yesterday (observation, but note Last Update date, which is Forecast Day 1) and then followed by days 1-7 forecast. These maps should be considered experimental and used with other appropriate Decision Support Systems such as NEWA or AgRadar.

Last Update: Thursday, 17-September, 2015 (Day 1 Forecast)

Apple scab

Observation (16-Sept)
Forecast Day 1 (17-Sept)
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7 (23-Sept)

Fire blight**

Observation (16-Sept)
Forecast Day 1 (17-Sept)
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7 (23-Aug)

Codling moth***

Observation (16-Sept)
Forecast Day 1 (17-Sept)
Day 2
Day 3
Day 4
Day 5
Day 6
Day 7 (23-Sept)


*Apple Scab Model

The Apple Scab Disease model results depict disease severity based on suitability of environmental conditions for disease development. Suitability is determined or forecast based on wetness events and associated temperature. A wetness event is defined as a rainfall event or due formation. Disease severity is organized into classes: inactive (no infection), active but no infection, and five severity levels: very low, low, moderate, high and very high.

Model Key

Disease Severity (Disease Severity in key) shows disease severity using unique color classes for each of the five severity classes.

These maps do not indicate that Apple Scab disease is present at a given location, but that conditions are favorable for disease development if inoculum is present.


**Fire Blight Model

The Fire Blight model results depict disease severity based on suitability of environmental conditions for disease development. Suitability is determined or forecast based on wetness events and associated temperature. A wetness event is defined as a rainfall event or dew formation. Disease severity is organized into three classes. These classes are inactive (no infection), active, but no infection, and active and infectious.

Model Key

Disease Severity (Apple Fire Blight in key) shows disease severity using unique colors for each class.

These maps do not indicate that Fire Blight disease is present at a given location, but that conditions are favorable for disease development if inoculum is present.


***Apple Codling Moth Model

The Apple Coddling Moth (CM) model results depict the development of the insect during the critical part of its life stage using a degree day model. The model uses a base of 50° F with an upper threshold of 88° F to calculate degree days.

Model Key

The progression (Percent of Critical Development in key) through the critical stages of development is shown as percent of development from 1 to 100.

There may be up to three generations in a given year.

© 2015 UMass Fruit Advisor