| Pome Fruit |
Amid-Thin® W Plant Growth Regulator Chemical thinning optimizes fruit size and quality and is one of the most important seasonal applications in pome fruit, like apples and pears. Amid-Thin® W Plant Growth Regulator is easy on foliage and offers a wide margin of crop safety when applied at recommended concentrations. Optimizes fruit size and quality in apples and pears Easy on foliage How To Use—Apple Thinning Apply Amid-Thin W at a rate of 25 to 50 ppm at full bloom or up to petal fall. Limit the use of higher concentrations of Amid-Thin W to difficult-to-thin and/or vigorous trees with ample pollination and good initial fruit set. Use the lower concentration on easy-to-thin varieties and/or weaker, less vigorous trees with less energy reserves. Amid-Thin W Application Rates for Thinning Apples at Full Bloom 1 , Petal Fall 2 in Normal Years 3 Apple Varieties Rate (NAA ppm) Amount of Amid-Thin W 100 gallons/A 150 gallons/A 300 gallons/A 4 Easy-to-thin:
Baldwin, Braeburn, Cortland, Cripps Pink, Granny Smith, Idared, Jonathan, McIntosh, Northern Spy, Red Delicious, Rhode Island Greening, Rome Beauty, Stayman and more Moderately difficult-to-thin: Cameo, Empire, Gala, Gingergold, Golden Supreme, Honeycrisp, Jerseymac, Jonagold, Mutsu, Olenburg (Duchess) Red Astrachan, Rome, Spartan, Williams Early, Yellow Transparent and more Difficult-to-thin: Early McIntosh, Fuji, Golden Delicious, Jonamac, Lodi, Macoun, Paula Red, Taylor Rome, Yellow Newton, York and more
0.25–0.4 lb (4–6.4 oz)
0.38–0.6 lb (6.1–9.6 oz)
0.75–1.2 lb (12–19.2 oz)
25–40
0.25–0.5 lb (4–8 oz)
0.38–0.75 lb (6.1–12 oz)
0.75–1.31 lb (12–20.9 oz)
25–50
0.4–0.5 lb (6.4–8 oz)
0.6–0.75 lb (9.6–12 oz)
1.2–1.31 lb (19.2–20.9 oz)
40–50
NAA = Napthaleneacetic acid 1 Full bloom: When 90% of the blossoms are fully open with petals beginning to fall from the king flower. 2 Petal fall: When approximately 90% of petals have fallen off. 3 Spraying can be delayed up to 3 weeks (21 days) after full bloom if unusually cool weather has slowed growth during
a cold year when daytime temperatures are consistently below 50°F. 4 At 300 gallons/A the maximum rate that can be applied is 44 ppm NAA.
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