Midwest Tree Fruit Spray Guide - Iowa State University Extension ...
Midwest Tree Fruit Spray Guide - Iowa State University Extension ...
Midwest Tree Fruit Spray Guide - Iowa State University Extension ...
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PEAR<br />
PEAR DORMANT TO SILVER TIP Apply before growth starts in spring and when temperatures are above 45°F.<br />
PEST/PROBLEM MATERIAL RATE/ACRE COMMENTS<br />
Fire blight Fixed copper fungicides<br />
(copper hydroxide,<br />
copper oxychloride,<br />
basic copper sulfate,<br />
bordeaux mixture)<br />
PEAR LATE DORMANT Before buds break into green tip in the spring<br />
MIDWEST FRUIT TREE SPRAY GUIDE<br />
24<br />
If fire blight was severe last year, a fixed copper<br />
spray at silver tip is suggested. Do not apply<br />
copper after 1 ⁄4-inch green leaf stage or when<br />
drying conditions are cool and slow because<br />
severe injury can occur. Many fixed copper<br />
fungicides are registered for use on pears.<br />
Fixed coppers can be mixed with oil. However,<br />
never combine copper sulfate alone with<br />
dormant oil.<br />
PEST/PROBLEM MATERIAL RATE/ACRE COMMENTS<br />
Scale insects,<br />
Superior oil<br />
2%<br />
Apply when temperatures are above 40°F<br />
European red mite eggs<br />
—never during freezing weather. Do not<br />
apply within 2 weeks of a sulfur spray or<br />
later than delayed dormant.<br />
European red mite eggs<br />
Pear psylla (adults)<br />
Apollo 4 SC<br />
Savey 50 DF<br />
Ambush 25 WP<br />
Asana XL 0.66 EC<br />
Danitol 2.4 EC<br />
Pounce 25 WP<br />
Proaxis 0.5 EC<br />
Warrior 1 CS<br />
Surround<br />
Mustang Max 0.8 EC<br />
Delegate 25 WG<br />
Superior oil<br />
4–8 fl oz<br />
3–6 oz<br />
25.6 oz<br />
19.2 fl oz<br />
21.3 fl oz<br />
25.6 oz<br />
5.1 fl oz<br />
5.1 fl oz<br />
50 lb<br />
4 fl oz<br />
6–7 oz<br />
1–3 gal<br />
Limit one Apollo or Savey application<br />
per year.<br />
Insecticide may be combined with oil<br />
during dormant and delayed dormant<br />
periods only. Oil on wood inhibits egg<br />
laying. Apply oil as soon as first eggs are<br />
laid and again 7 days later if adults still<br />
present. Apply dilute. Use 3% at dormant,<br />
2% at budburst, and 1% up to whitebud.<br />
Apply this rate of Asana only during<br />
dormant to pre-bloom (white bud) stage.<br />
Rate for Surround is per 100 gallons.<br />
Apply Surround every 7 to 14 days,<br />
beginning no later than green tip.
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