| Background Information for this page | |||||||
| Return to radar list for Monmouth ME | |||||||
| Chart version of thinner sensitivity ratings | |||||||
| Weather data for Monmouth ME. Forecast values begin August 3, 2008 | |||||||
| Other factors may outweigh the summary
statements made below! Other influences include: fruit diameter, fruit exposure to temperatures >=75 F, pollination, this year's cropload, last year's cropload, warm February-early April temperatures, frost and prolonged cool and cloudy weather during bloom, previous fall weather, foliage condition last summer) Ratings below are for the influence of weather on fruit sensitivity to chemical thinning agents. Ratings assume fruit are less than 13mm diameter. Dates in bottom rows are beyond 18mm diameter for most cultivars, and are intended only for late cultivars. Look at your fruit! |
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| Rough guess McIntosh King fruit diameter dates: 12mm - June 8, Sunday 15mm - June 10, Tuesday 18mm - June 13, Friday |
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| Date after which fruit have exposure to 2 days of daily high temperature of at least 75 F: Sunday, June 8 | |||||||
| Very warm night temperatures (> 69F)
can lead to "EXCESSIVE THINNING RISK", especially if combined with cloudy weather or if NAA is used as thinning agent. Warm nights + Cloudy days -----> Increased sensitivity, maximum thinning. Warm nights + Sunny days -----> Intermediate senstivity, moderate thinning. Cool nights + Cloudy days -----> Reduced sensitivity Cool nights + Sunny days -----> Reduced sensitivity, minimum thinning. |
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| Postbloom thinner Application date Calculations assume morning application. If thinner applied after noon, use rating for next day. |
% CLOUD SHADING Arbitrary categories: 40% or more = "cloudy" 20% or less = "sunny" High shading on 3 days after application increases thinning response. |
AVERAGE NIGHT TEMPERATURE relative to 50 F threshold for following 7pm--7am. Example: Avg. 52F night temp = 2. Values rounded for display, and range from 0 to 20+. High temperature for 3 nights after application increases thinning response. |
SUMMARY of weather influence on sensitivity of fruit to thinning agents applied on morning of listed date Ratings assume fruit are within susceptible diameter range for thinning. |
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| McIntosh
95% Petal Fall Tue, May 27 |
25% | 3 | Stronger influence for reduced sensitivity |
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| 100%
Petal Fall Wed, May 28 |
sunny 1% | 1 | Stronger influence for reduced sensitivity |
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| Thu, May 29 |
sunny 5% | 5 | Reduced sensitivity |
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| Fri, May 30 |
sunny 4% | 3 | Intermediate |
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| Sat, May 31 |
cloudy 64% | 4 | Intermediate |
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| Sun, June 1 |
34% | 9 | Intermediate |
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| Fruit
Set Mon, June 2 |
cloudy 48% | 6 | Intermediate |
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| Tue, June 3 |
28% | 8 | Intermediate |
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| Wed, June 4 |
cloudy 63% | 4 | Intermediate |
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| Thu, June 5 |
cloudy 65% | 5 | Intermediate |
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| Fri, June 6 |
cloudy 68% | 3 | Increased sensitivity |
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| Sat, June 7 |
38% | 13 | Stronger influence for Increased sensitivity |
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| Sun, June 8 |
sunny 5% | 22 | Stronger influence for Increased sensitivity -- sensitivity may be less if fruit diameter is >12mm |
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| Mon, June 9 |
28% | 17 | Increased sensitivity -- fruit >12mm probably have less sensitivity due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Tue, June 10 |
sunny 15% | 14 | Intermediate -- fruit >15mm may have minimal sensitivity due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Wed, June 11 |
sunny 20% | 13 | Intermediate -- fruit >15mm may have minimal sensitivity due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Thu, June 12 |
sunny 3% | 6 | Intermediate -- fruit >15mm may have minimal sensitivity due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Fri, June 13 |
sunny 1% | 8 | Intermediate -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Sat, June 14 |
sunny 4% | 10 | Intermediate -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Sun, June 15 |
cloudy 66% | 6 | Increased sensitivity -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Mon, June 16 |
cloudy 64% | 7 | Increased sensitivity -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Tue, June 17 |
cloudy 56% | 7 | Increased sensitivity -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Wed, June 18 |
39% | 6 | Intermediate -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Thu, June 19 |
cloudy 44% | 7 | Intermediate -- fruit > 18mm are probably beyond predictable chemical thinning due to size and exposure to 2 or more days with high temperatures >= 75F |
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| cloudy 48% | 7 | ||||||
| 28% | 8 | ||||||