| Background Information for this page | |||||
| Return to radar list for Greenville RI | |||||
| This table estimates fungicide intervals for suppressing spread of secondary scab if it should occur. Use the appropriate primary scab respray guidelines instead of this table until ascospore releases are completed. Rules used to estimate protection depletion change after fruit set and again after terminal bud set. See Background Information page for details. | |||||
| Brown text with grey background indicates dates when 2nd generation scab lesions from the
final ascospore release have had time to begin appearing. After this date it is possible to confirm
the status of primary scab control. If
successful control of primary apple scab infections has been confirmed, this
table is no longer needed, and fungicide application dates can be made with
the extended intervals adequate to prevent flyspeck and other summer
diseases. But if there are enough active scab infections present to cause an unacceptable risk of fruit scab infection, this table provides estimates for respray dates to keep scab infections from spreading. If active lesions are found, fungicide protection is needed until those lesions exhaust their supply of spores, which takes about 4 weeks. Depending on scab severity, market sensitivity, temperature, and proximity to harvest; shorter or longer fungicide intervals to suppress spread from active scab lesions may be more appropriate than the estimates shown below. |
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| The estimated date
for 95+% scab ascsopore release at this site is May 16. The estimated McIntosh fruit set date for this site is May 20. The approximate terminal bud set date for this site is June 30. |
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| Weather data for Greenville RI. Forecast values begin October 14, 2011 | |||||
| Previous Spray Date Estimates assume that fungicide was applied BEFORE rain on spray date |
Inches Rain | Protection
End Date against Secondary Scab for full-dose captan, mancozeb or other protectant fungicide |
Percent primary scab potential beginning to show as (1st generation) & 2nd gen. lesions by protection end date |
Respray
Deadline = Start date for next scab infection period after protection ends |
|
| Fri, May 27 | 0 | June 7, Tue | (98%) | 59% | June 8, Wed |
| Sat, May 28 | 0 | June 8, Wed | (98%) | 59% | June 8, Wed |
| Sun, May 29 | 0 | June 9, Thu | (98%) | 59% | June 9, Thu |
| Mon, May 30 | 0 | June 12, Sun | (98%) | 59% | June 14, Tue |
| Tue, May 31 | 0 | June 12, Sun | (98%) | 59% | June 14, Tue |
| Wed, June 1 | 0.64 | June 12, Sun | (98%) | 59% | June 14, Tue |
| Thu, June 2 | 0 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Fri, June 3 | 0 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Sat, June 4 | 0 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Sun, June 5 | 0.01 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Mon, June 6 | 0 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Tue, June 7 | 0 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Wed, June 8 | 0.04 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Thu, June 9 | 0.83 | June 13, Mon | (98%) | 59% | June 14, Tue |
| Fri, June 10 | 0 | June 15, Wed | (100%) | 97% | June 17, Fri |
| Sat, June 11 | 0.65 | June 15, Wed | (100%) | 97% | June 17, Fri |
| Sun, June 12 | 1.17 | June 19, Sun | 97% | June 22, Wed | |
| Mon, June 13 | 0.07 | June 24, Fri | 98% | June 25, Sat | |
| Tue, June 14 | 0.16 | June 24, Fri | 98% | June 25, Sat | |
| Wed, June 15 | 0 | June 24, Fri | 98% | June 25, Sat | |
| Thu, June 16 | 0 | June 24, Fri | 98% | June 25, Sat | |
| Fri, June 17 | 0.60 | June 24, Fri | 98% | June 25, Sat | |
| Sat, June 18 | 0.03 | June 30, Thu | 100% | July 1, Fri | |
| Sun, June 19 | 0 | June 30, Thu | July 1, Fri | ||
| Mon, June 20 | 0 | June 30, Thu | July 1, Fri | ||
| Tue, June 21 | 0 | June 30, Thu | July 1, Fri | ||
| Wed, June 22 | 1.02 | June 30, Thu | July 1, Fri | ||
| Thu, June 23 | 0.52 | July 7, Thu | July 8, Fri | ||
| Fri, June 24 | 0.04 | July 8, Fri | July 12, Tue | ||
| Sat, June 25 | 0.36 | July 9, Sat | July 12, Tue | ||
| Sun, June 26 | 0.02 | July 10, Sun | July 12, Tue | ||
| Mon, June 27 | 0 | July 11, Mon | July 12, Tue | ||
| Tue, June 28 | 0 | July 12, Tue | July 13, Wed | ||
| Wed, June 29 | 0.07 | July 13, Wed | July 13, Wed | ||
| Thu, June 30 | 0 | July 14, Thu | July 18, Mon | ||
| Fri, July 1 | 0.02 | July 14, Thu | July 18, Mon | ||
| Sat, July 2 | 0 | July 14, Thu | July 18, Mon | ||
| Sun, July 3 | 0.07 | July 14, Thu | July 18, Mon | ||
| Mon, July 4 | 0 | July 14, Thu | July 18, Mon | ||
| Tue, July 5 | 0 | July 14, Thu | July 18, Mon | ||
| Wed, July 6 | 0 | July 14, Thu | July 18, Mon | ||
| Thu, July 7 | 0 | July 14, Thu | July 18, Mon | ||
| Fri, July 8 | 1.37 | July 14, Thu | July 18, Mon | ||
| Sat, July 9 | 0.27 | July 23, Sat | July 23, Sat | ||
| Sun, July 10 | 0 | July 24, Sun | July 25, Mon | ||
| Mon, July 11 | 0 | July 25, Mon | July 26, Tue | ||
| Tue, July 12 | 0.19 | July 26, Tue | July 26, Tue | ||
| Wed, July 13 | 0.69 | July 27, Wed | July 29, Fri | ||
| Thu, July 14 | 0.34 | July 28, Thu | July 29, Fri | ||
| Fri, July 15 | 0 | July 29, Fri | July 29, Fri | ||
| Sat, July 16 | 0 | July 30, Sat | August 2, Tue | ||
| Sun, July 17 | 0 | July 31, Sun | August 2, Tue | ||
| Mon, July 18 | 0.08 | August 1, Mon | August 2, Tue | ||
| Tue, July 19 | 0 | August 2, Tue | August 2, Tue | ||
| Wed, July 20 | 0 | August 3, Wed | August 6, Sat | ||
| Thu, July 21 | 0 | August 4, Thu | August 6, Sat | ||
| Fri, July 22 | 0 | August 5, Fri | August 6, Sat | ||
| Sat, July 23 | 0.08 | August 6, Sat | August 6, Sat | ||
| Sun, July 24 | 0 | August 7, Sun | August 8, Mon | ||
| Mon, July 25 | 0.34 | August 8, Mon | August 8, Mon | ||
| Tue, July 26 | 0.42 | August 8, Mon | August 8, Mon | ||
| Wed, July 27 | 0 | August 8, Mon | August 8, Mon | ||
| Thu, July 28 | 0 | August 8, Mon | August 8, Mon | ||
| Fri, July 29 | 0.15 | August 8, Mon | August 8, Mon | ||
| Sat, July 30 | 0 | August 8, Mon | August 8, Mon | ||
| Sun, July 31 | 0 | August 8, Mon | August 8, Mon | ||
| Mon, August 1 | 0 | August 8, Mon | August 8, Mon | ||
| Tue, August 2 | 0.26 | August 8, Mon | August 8, Mon | ||
| Wed, August 3 | 0 | August 9, Tue | August 10, Wed | ||
| Thu, August 4 | 0 | August 9, Tue | August 10, Wed | ||
| Fri, August 5 | 0 | August 9, Tue | August 10, Wed | ||
| Sat, August 6 | 0.09 | August 9, Tue | August 10, Wed | ||
| Sun, August 7 | 1.86 | August 9, Tue | August 10, Wed | ||
| Mon, August 8 | 0.44 | August 16, Tue | Too early to estimate | ||
| Tue, August 9 | 0.86 | August 16, Tue | |||
| Wed, August 10 | 0.48 | August 16, Tue | |||
| Thu, August 11 | 0 | August 16, Tue | |||
| Fri, August 12 | 0 | August 16, Tue | |||
| Sat, August 13 | 0 | August 16, Tue | |||
| Sun, August 14 | 0.16 | August 16, Tue | |||
| Mon, August 15 | 2.26 | August 16, Tue | |||
| Tue, August 16 | 0.02 | August 29, Mon | |||
| Wed, August 17 | 0 | August 29, Mon | |||
| Thu, August 18 | 0 | August 29, Mon | |||
| Fri, August 19 | 0 | August 29, Mon | |||
| Sat, August 20 | 0.16 | August 29, Mon | |||
| Sun, August 21 | 0.18 | August 29, Mon | |||
| Mon, August 22 | 0.35 | August 29, Mon | |||
| Tue, August 23 | 0 | August 29, Mon | |||
| Wed, August 24 | 0 | August 29, Mon | |||
| Thu, August 25 | 0 | August 29, Mon | |||
| Fri, August 26 | 0.08 | August 29, Mon | |||
| Sat, August 27 | 0.68 | August 29, Mon | |||
| Sun, August 28 | 2.54 | August 29, Mon | |||
| Mon, August 29 | 0 | September 8, Thu | |||
| Tue, August 30 | 0 | September 8, Thu | |||
| Wed, August 31 | 0 | September 8, Thu | |||