| Background Information for this page | |||
| Return to radar list for Greenville RI | |||
| Weather data for Greenville RI. Forecast values begin September 20, 2011 | |||
| These estimates of maximum safe
intervals between sampling dates for European red mite (ERM) are based on
temperature-driven development rate.
The time required for ERM to grow from egg to reproductive adults
changes dramatically between cool versus hot temperatures. Weekly sampling is usually adequate, but is
more frequent than needed during cool temperatures. Knowing the number of days between
generations allows growers to reduce sample frequency during cool weather,
and during hot weather indicates when intervals between samples may need to
be as short as 4 days to detect population increase before foliar damage and
tree stress occurs. The resample dates are constrained to require at least one sample during the 7 days before egglaying starts for each generation. Date for 2nd generation eggs is in green italic font, 3rd generation in red, and 4th generation in blue. The 3rd and 4th generation egglaying start dates may be in July. Recommended treatment thresholds change through the summer. See Background page for details. |
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| Date on which mites were monitored | Number of days before resampling if mite density was "below threshold" |
Resample date if mite density was "below threshold" |
|
| McIntosh
95% Petal Fall Fri, May 13 |
---> 14 ---> | May 27, Fri | |
| Sat, May 14 | ---> 13 ---> | May 27, Fri | |
| Sun, May 15 | ---> 12 ---> | May 27, Fri | |
| Mon, May 16 | ---> 11 ---> | May 27, Fri | |
| Tue, May 17 | ---> 10 ---> | May 27, Fri | |
| Wed, May 18 | ---> 9 ---> | May 27, Fri | |
| Thu, May 19 | ---> 8 ---> | May 27, Fri | |
| Fri, May 20 | ---> 9 ---> | May 29, Sun | |
| Sat, May 21 | ---> 9 ---> | May 30, Mon | |
| Sun, May 22 | ---> 8 ---> | May 30, Mon | |
| Mon, May 23 | ---> 7 ---> | May 30, Mon | |
| Tue, May 24 | ---> 7 ---> | May 31, Tue | |
| Wed, May 25 | ---> 7 ---> | June 1, Wed | |
| Thu, May 26 | ---> 7 ---> | June 2, Thu | |
| Fri, May 27 | ---> 8 ---> | June 4, Sat | |
| Sat, May 28 | ---> 9 ---> | June 6, Mon | |
| Sun, May 29 | ---> 9 ---> | June 7, Tue | |
| Mon, May 30 | ---> 8 ---> | June 7, Tue | |
| Tue, May 31 | ---> 8 ---> | June 8, Wed | |
| Wed, June 1 | ---> 8 ---> | June 9, Thu | |
| Thu, June 2 | ---> 7 ---> | June 9, Thu | |
| Fri, June 3 | ---> 6 ---> | June 9, Thu | |
| Sat, June 4 | ---> 8 ---> | June 12, Sun | |
| Sun, June 5 | ---> 8 ---> | June 13, Mon | |
| Mon, June 6 | ---> 8 ---> | June 14, Tue | |
| Tue, June 7 | ---> 9 ---> | June 16, Thu | |
| Wed, June 8 | ---> 10 ---> | June 18, Sat | |
| Thu, June 9 | ---> 10 ---> | June 19, Sun | |
| Fri, June 10 | ---> 10 ---> | June 20, Mon | |
| Sat, June 11 | ---> 10 ---> | June 21, Tue | |
| Sun, June 12 | ---> 9 ---> | June 21, Tue | |
| Mon, June 13 | ---> 9 ---> | June 22, Wed | |
| Tue, June 14 | ---> 9 ---> | June 23, Thu | |
| Wed, June 15 | ---> 9 ---> | June 24, Fri | |
| Thu, June 16 | ---> 9 ---> | June 25, Sat | |
| Fri, June 17 | ---> 9 ---> | June 26, Sun | |
| Sat, June 18 | ---> 9 ---> | June 27, Mon | |
| Sun, June 19 | ---> 8 ---> | June 27, Mon | |
| Mon, June 20 | ---> 8 ---> | June 28, Tue | |
| Tue, June 21 | ---> 8 ---> | June 29, Wed | |
| Wed, June 22 | ---> 8 ---> | June 30, Thu | |
| Thu, June 23 | ---> 7 ---> | June 30, Thu | |
| Fri, June 24 | ---> 6 ---> | June 30, Thu | |
| Sat, June 25 | ---> 7 ---> | July 2, Sat | |
| Sun, June 26 | ---> 6 ---> | July 2, Sat | |
| Mon, June 27 | ---> 6 ---> | July 3, Sun | |
| Tue, June 28 | ---> 6 ---> | July 4, Mon | |
| Wed, June 29 | ---> 6 ---> | July 5, Tue | |
| Thu, June 30 | ---> 5 ---> | July 5, Tue | |