2001 2002 TOBACCO PROGRAM

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MANAGINGSPOTTED WILT
Paul F. Bertrand, PathologistUniversity of
Georgia
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WHAT CAN BE DONE ?

• TRANSPLANT DATE
• ADMIRE / PLATINUM
• PLANT SOURCE ?
• ACTIGARD
• GOOD STAND
• MAKE CROP GROW

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TRANSPLANT DATE

• TRANSPLANT DATE IS IMPORTANT
• but
• NOT CONSISTENT FROM YR. TO YR.
• NOT CONSISTENT FROM FARM TO
• FARM WITHIN A YR.

so ---
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CONCLUSION
SPECIFIC BEST TRANSPLANT DATE CANNOT BE
DETERMINED
but ---
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TRANSPLANT DATE
this means ---
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TRANSPLANT DATE
RISK OF MOST SPOTTED WILT 2X GREATER
PLANTING BEFORE 7 APRIL
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TRANSPLANT DATE
also ---

• NOT CONSISTENT FROM FARM TO
• FARM WITHIN A YR

therefore ---
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TRANSPLANT DATE
PLANTING BY THE MOON WONT AFFECT SPOTTED WILT !
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ADMIRE and SPOTTED WILT
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ADMIRE CAN GIVE25 - 35 CONTROL OF TSWV
CONCLUSION BASED ON 94 TRIALS
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WHY ADMIRE ?
THE EFFECT APPEARS RELATED TO A UNIQUE MODE OF
ACTION WHICH TERMINATES FEEDING
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RESULTS WITH ADMIRE HAVE BEEN ERRATIC
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ADMIRE RESULTS
HOUSE PLANTS _at_ 1.0 oz. / 1,000
0 - 61 TSWV CONTROL IN 70 TRIALS 0 - 55
TSWV CONTROL IN 24 TRIALS
60 / 70 TRIALS SHOW TSWV CONTROL
BED PLANTS _at_ 1.8 oz. / 1,000
13 / 24 TRIALS SHOW TSWV CONTROL
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REASONS FOR ERRATICPERFORMANCE W/ ADMIRE

• APPLICATION
• UP-TAKE (ESP. FROM TPW)

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ADMIRE APPLICATION
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ADMIRE APPLICATION
PLANT HOUSETRAY DRENCH
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ADMIRE APPLICATION
PLANT HOUSE TRAY DRENCH

• 1.0 - 2.8 oz. / 1,000 TRAY CELLS
• SPRAY ON RINSE OFF
• RINSE BEFORE ADMIRE DRIES
• IF DRY PLANTS LOOK CHALKY
• ADMIRE DID NOT RINSE OFF
• IT MUST BE RE-APPLIED
• gt 2.0 oz. / 1,000 MAY STUNT PLANTS

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ADMIRE APPLICATION
PLANT HOUSE TRAY DRENCH IMPROVING RINSE OFF

• TREAT WHEN PLANTS ARE WET
• RIG A TRAILING BOOM HOOKED TO
• GARDEN HOSE ON A REEL
• USE A HOSE WAND SPRINKLER
• but ---

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ADMIRE APPLICATION
PLANT HOUSE TRAY DRENCH IMPROVING RINSE OFF

• DO NOT OVER RINSE

LOOK FOR MILKY OOZE UNDER TRAYS JUST AFTER RINSE
OFF
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ADMIRE APPLICATION
TRANSPLANTWATER
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ADMIRE APPLICATION

• 1.8 - 2.8 oz. / 1,000 PLANTS
• MIX WELL MIX SOME MORE
• NURSE TANKS - MIX 3-5 MIN.
• BEFORE EACH REFILL

TRANSPLANT WATER
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ADMIRE APPLICATION
TRANSPLANT WATER PROBLEMS

• CALIBRATION DIFFICULT

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ADMIRE APPLICATION CALIBRATION
2
1
VS
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ADMIRE APPLICATION

• TPW AND ADMIRE WILL DISPERSE
• MORE IN DRY SOIL
• PLACEMENT ERRATIC

TRANSPLANT WATER DIFFICULTIES
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MOST ADMIRE ENDS UPBETWEEN PLANTS
24
16
but ---
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BARE ROOT PLANTS ADMIRE vs NO ADMIRE IN
TRANSPLANT WATER
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ADMIRE RATE
IF APPLICATION IS GOOD INCREASING ADMIRE
RATE INCREASES TSWV CONTROL

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ADMIRE UP-TAKE
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ADMIRE UP-TAKE

• ADMIRE PUT NEAR THE ROOTS
• INFECTION THROUGH LEAVES
• ADMIRE MUST MOVE INTO
• ROOTS UP TO LEAVES
• BEFORE THRIPS FEED

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ADMIRE (1.0 oz / 1,000)vsPLATINUM (0.8 oz /
1,000)
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ADMIRE vs PLATINUM
FINAL TSWV
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PLANT SOURCEHOUSE PLANTS vs BED PLANTS
NO REAL DIFFERENCE ?
except ---
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STAND LOSS ?
WITH BED PLANTS
GREATER CHANCE OF USING INFECTED TRANSPLANTS
AND SUFFERING SOME STAND LOSS
and---
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ADMIRE
TPW TREATMENT BED PLANTS ( 54 CHANCE OF
BENEFIT) VS PLANT HOUSE TRAY DRENCH ( 86
CHANCE OF BENEFIT)
why ? ---
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HOUSE PLANTTRAY DRENCH

• SOME UPTAKE BEFORE TRANSPLANT
• ADMIRE BOUND IN ROOT ZONE
• NO ADMIRE DISPERSAL IN DRY SOIL
• NO ADMIRE PLACED BETWEEN PLANTS
• LESS DELAYED UPTAKE WHILE
• NEW ROOTS CUT