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DISEASE UPDATE 04 Paul E. Bertrand. SPOTTED WILT. TILLAGE TRANSPLANTS ADMIRE ACTIGARD. TILLAGE. FIELD WEEDS. WHEAT (GRASSES) AS A TSWV SOURCE. WHEAT (GRASSES) AS A TSWV SOURCE. 1 . MOST THRIPS LEAVING WHEAT ARE CEREAL THRIPS WHICH DO NOT TRANSMIT TSWV .

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Disease update 04 paul e bertrand l.jpg
DISEASE UPDATE 04Paul E. Bertrand


Spotted wilt l.jpg
SPOTTED WILT

  • TILLAGE

  • TRANSPLANTS

  • ADMIRE

  • ACTIGARD


Tillage l.jpg
TILLAGE

FIELD WEEDS


Wheat grasses as a tswv source l.jpg
WHEAT (GRASSES)AS A TSWV SOURCE


Wheat grasses as a tswv source5 l.jpg
WHEAT (GRASSES)AS A TSWV SOURCE

1.MOST THRIPS LEAVING WHEAT

ARE CEREAL THRIPS WHICH

DO NOT TRANSMIT TSWV.


Wheat grasses as a tswv source6 l.jpg
WHEAT (GRASSES)AS A TSWV SOURCE

1.MOST THRIPS LEAVING WHEAT

ARE CEREAL THRIPS WHICH

DO NOT TRANSMIT TSWV.

2.WHEAT IS NOT A TSWV HOST.


Slide7 l.jpg
TSWV

ACQUIRED FOR

TRANSMISSION

ONLY BY JUVENILES

and ---


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TSWV

NECESSARY JUVENILE

STAGE EXISTS ONLY

12 - 15 HRS.

so ---


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TSWV

TO TRANSMIT TSWV LATER THRIPS MUST HATCH ON OR NEAR INFECTED PLANTS


Wheat grasses as a tswv source10 l.jpg
WHEAT (GRASSES)AS A TSWV SOURCE

1.MOST THRIPS LEAVING WHEAT

ARE CEREAL THRIPS WHICH

DO NOT TRANSMIT TSWV.

2. WHEAT IS NOT A TSWV HOST.

3.TOBACCO THRIPS HATCHED ON

WHEAT HAVE NO OPPORTUNITY

TO ACQUIRE TSWV.


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IN FIELD WEED

MANAGEMENT


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IN FIELD WEEDMANAGEMENT

  • CLEAN ROWS

  • WEEDY ROWS

  • WHEAT ROWS


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IN FIELD WEEDMANAGEMENT

  • 2 ROW

  • 4 ROW

  • 8 ROW

TOBACCO


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2004

EARLY WEEDS

SUMNER: 42/90 ELISA+

GRINER: 58/90 ELISA+


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EFFECT OF COVER ON SPOTTED WILT

NEXT TO COVER


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EFFECT OF COVER ON SPOTTED WILT

NEXT TO COVER


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EFFECT OF COVER ON SPOTTED WILT

NEXT TO COVER


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WHEAT

SUMNER: 0/90 ELISA+

GRINER: 0/90 ELISA+


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REDISTRIBUTION OF

ADULT THRIPS FROM WHEAT ?


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SUMNER FARM

% TSWV

ROW FROM COVER


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GRINER FARM

% TSWV

ROW FROM COVER


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WHEAT (GRASSES)AS A TSWV SOURCE

1.NOT A SOURCE

but

2.CAN PLAY A ROLE


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TILLAGE

STRIP TILL



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RESULTS

% TSWV

but---


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2004

LITTER LEFT STANDING


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LAY BY

LITTER CUT OUT

5 WEEKS POST TP


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2004 RESULTS

% TSWV


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HOUSE PLANTSvsBED PLANTS


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ARE THE PLANTS

THEMSELVES

DIFFERENT ?


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HOUSE vs BED PLANTS

  • 9 SOURCES OF PLANTS

  • COLLECTED THE SAME DAY

  • GROWN AT 2 LOCATIONS

  • SET THE SAME DAY

  • ADMIRE 2.0 oz /1,000 (TPW)


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2003 PLANT TRIALRESULTS


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HOUSE

0 - 1 %

INFECTED TRANSPLANTS

2/5 LOTS HAD ONE ELISA+ PLANT


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HOUSE

0 - 1 %

BED

0 %

INFECTED TRANSPLANTS

2/5 LOTS HAD ONE ELISA+ PLANT






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EXPECTED RESULTS

  • BETTER RESPONSE TO TPW ADMIRE WITH HOUSE PLANTS

  • SOME STAND LOSS WITH BED PLANTS & TPW ADMIRE


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UNEXPECTED RESULTS

  • MORE INFECTED HOUSE PLANTS

  • MORE TSWV WITH HOUSE PLANTS


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2004 PLANT TRIALRESULTS






2004 results similar to 2003 l.jpg
2004 RESULTSSIMILAR TO 2003

  • MORE TSWV WITH HOUSE PLANTS

  • BETTER RESPONSE TO TPW ADMIRE WITH HOUSE PLANTS

  • SOME STAND LOSS WITH BED PLANTS & TPW ADMIRE


Infected transplants51 l.jpg
INFECTED TRANSPLANTS

HOUSE

1 - 4

96


Infected transplants52 l.jpg
INFECTED TRANSPLANTS

HOUSE

1 - 4

BED

0 - 6

96

96


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2004 RESULTS

  • SIMILAR TSWV INFECTION IN BED AND HOUSE PLANTS

  • NO CORRELATION BETWEEN ELISA+ TRANSPLANTS AND:

    • STAND LOSS

    • EARLY TSWV

    • FINAL TSWV



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FLOAT HOUSES

~ 65 % OF PLANTS

ADMIRE DRENCH TRT.

~ 90 % SUCCESS


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PLANT BEDS

~ 30 % OF PLANTS

ADMIRE TPW TRT.

~ 55 % SUCCESS


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ADMIRE

BOTH METHODS

CONTROL

LATER APHIDS


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2004APPLICATION OFPROVADO TOPLANT BEDS



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T-RAIL HOUSES

~ 5 % OF PLANTS

ADMIRE DRENCH TRT.

~ 35 % SUCCESS


T rail houses l.jpg
T-RAIL HOUSES

IS IRRIGATION

WASHING ADMIRE

OUT OF TRAYS ?


2004 trials 6 l.jpg
2004 TRIALS (6)

NOT MUCH

TREATMENT

DIFFERENCE


Actigard l.jpg
ACTIGARD:

TRANSPLANT

TREATMENT



Actigard treatment house plants l.jpg
ACTIGARD TREATMENT(HOUSE PLANTS)

  • 1.0 oz. / 100,000 PLANTS

  • SPRAY ON

  • 7 - 14 DAYS PRE TP

  • SET IN PRE WETTED BEDS


Actigard66 l.jpg
ACTIGARD:

FIELD SPRAYS



2002 results l.jpg
2002 RESULTS

FINAL % TSWV




2004 results71 l.jpg
2004 RESULTS

FINAL % TSWV


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ACTIGARDFIELD SPRAYS

  • NOT CONSISTANT (FARM TO FARM)

  • 1 SPRAY INCREASED TSWV

  • 5 SPRAYS WORK BEST:

    • 0,7,14,21,28 DAYS POST T P

    • $125 / Ac

  • LAST 2 SPRAYS (21&28 DAYS) ?


  • Slide73 l.jpg

    BLACK

    SHANK


    Black shank l.jpg
    BLACK SHANK

    RACE 1SITUATION


    Slide75 l.jpg

    BLACK SHANK

    RACE 1 DISASTER


    New race 0 resistance is based on a single gene l.jpg
    NEW RACE 0 RESISTANCEIS BASED ON ASINGLE GENE

    and ---


    All high resistance varieties have this gene l.jpg
    ALL HIGH RESISTANCE VARIETIES HAVETHIS GENE

    NC-71 Sp G168

    NC-72 Sp GH20

    NC-297

    etc.


    Continuous planting these varieties will select race 1 l.jpg
    CONTINUOUS PLANTINGTHESE VARIETIESWILL SELECT RACE 1


    Black shank race 1 l.jpg
    BLACK SHANKRACE 1

    • MAINTAIN OR INCREASE ROTATION TIME

      and ---

    • ALTERNATE HIGH RES. WITH K-346


    Black shank race 180 l.jpg
    BLACK SHANKRACE 1

    • MAINTAIN OR INCREASE ROTATION TIME

      and ---

    • ALTERNATE HIGH RES. WITH K-346

    and ---


    Use ridomil l.jpg
    USERIDOMIL


    2001 brooks co black shank trial l.jpg
    2001 BROOKS CO.BLACK SHANK TRIAL

    % BLACK SHANK


    2001 brooks co black shank trial83 l.jpg
    2001 BROOKS CO.BLACK SHANK TRIAL

    % BLACK SHANK


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