| 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, 2010 | |||||||
| 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 - May 26, Wednesday 15mm - May 29, Saturday 18mm - June 2, Wednesday |
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| Date after which fruit have exposure to 2 days of daily high temperature of at least 75 F: Monday, May 24 | |||||||
| 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 Fri, May 14 |
cloudy 43% | 1 | Stronger influence for reduced sensitivity |
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| 100%
Petal Fall Sat, May 15 |
cloudy 50% | 1 | Stronger influence for reduced sensitivity |
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| Sun, May 16 |
sunny 4% | 1 | Stronger influence for reduced sensitivity |
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| Mon, May 17 |
sunny 1% | 1 | Stronger influence for reduced sensitivity |
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| Tue, May 18 |
sunny 5% | 0 | Stronger influence for reduced sensitivity |
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| Wed, May 19 |
cloudy 70% | 1 | Reduced sensitivity |
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| Fruit
Set Thu, May 20 |
sunny 9% | 8 | Stronger influence for reduced sensitivity |
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| Fri, May 21 |
sunny 1% | 1 | Stronger influence for reduced sensitivity |
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| Sat, May 22 |
sunny 7% | 3 | Reduced sensitivity |
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| Sun, May 23 |
sunny 14% | 6 | Intermediate |
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| Mon, May 24 |
sunny 7% | 12 | Intermediate |
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| Tue, May 25 |
sunny 3% | 20 | Reduced sensitivity -- but true sensitivity may be less because of fruit exposure to 2 or more days with high temperatures >= 75F |
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| Wed, May 26 |
sunny 12% | 4 | Stronger influence for reduced 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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| Thu, May 27 |
sunny 8% | 2 | Stronger influence for reduced 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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| Fri, May 28 |
sunny 5% | 2 | Reduced 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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| Sat, May 29 |
sunny 13% | 9 | Reduced sensitivity -- fruit >15mm may have minimal sensitivity due to size and exposure to 2 or more days with high temperatures >= 75F |
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| Sun, May 30 |
sunny 16% | 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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| Mon, May 31 |
sunny 5% | 5 | 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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| Tue, June 1 |
cloudy 48% | 7 | 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 2 |
35% | 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 3 |
cloudy 64% | 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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| Fri, June 4 |
28% | 10 | 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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| Sat, June 5 |
cloudy 55% | 11 | 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 6 |
cloudy 64% | 4 | Reduced 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 7 |
sunny 15% | 3 | Reduced 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 8 |
34% | 1 | Reduced 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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| sunny 19% | 5 | ||||||
| cloudy 70% | 1 | ||||||