Midwest Tree Fruit Spray Guide - Iowa State University Extension ...

APPLE GREEN TIP CONTINUED
PEST/PROBLEM MATERIAL RATE/ACRE COMMENTS
San Jose scale,
Superior oil
2%
Apply oil when temperature is above 40°F;
European red mite eggs, plus one of the following
never during freezing weather. Check label for
aphid eggs
Lorsban Advanced 4 E 0.5–4 pt fungicide/oil compatibility. Oil is most effective
Lorsban 50W
3 lb
when sprayed dilute under calm conditions to
Lorsban 75 WG
2–2.67 lb assure thorough coverage of all woody tissue.
Supracide 25 WP
4–12 lb
Supracide 2 E
8–12 pt Where San Jose scale is a main target of oil
Diazinon 50W
1–4 lb sprays, the best timing for application is at
Diazinon AG 600
See label. green tip. Wait until half-inch green or pink if
European red mite or rosy apple aphid is the
primary target. Although Lorsban, Supracide,
and Diazinon are labeled for use with oil to
increase scale control, trials have shown that oil
alone results in greater than 98 percent control
of scales if coverage is thorough. Adding an
insecticide does improve aphid control.
APPLE HALF-INCH GREEN
Spotted tentiform
leafminer, adults
Esteem 35 WP
Vydate L
Endosulfan 3 EC
3–5 oz
2–4 pt
3.33 qt
MIDWEST FRUIT TREE SPRAY GUIDE
8
Put pheromone traps in place now to monitor
adult leafminer activity.
PEST/PROBLEM MATERIAL RATE/ACRE COMMENTS
Primary scab
Same as for green tip
Esteem controls scale anytime between halfinch
green and second cover. When used at
San Jose scale
Same as for green tip
half-inch green it also controls rosy apple aphid.
or
When used at pink it also controls leafminer. The
Esteem 35 WP
4–5 oz minimum rate is effective when used pre-bloom,
but the maximum rate is needed if application is
European red mite eggs Superior oil
2%
delayed until the crawler stage in early summer.
Delaying oil application until this time will give
better control of mites than earlier applications.
Control of spotted tentiform leafminer adults at
half-inch green may be improved by spraying
in the evening when moths are most active, but
killing spotted tentiform leafminer adults at halfinch
green is not as effective as killing hatching
eggs at petal fall. The pyrethroids Ambush,
Asana, Baythroid, Danitol, Mustang Max,
Pounce, Proaxis, Renounce, Voliam Xpress,
and Warrior also are labeled for control of adult
spotted tentiform leafminers but are not recommended
because they kill predaceous mites that
feed on European red mite and twospotted
spider mite, thereby triggering outbreaks of
these pests.