DiseaseUpdate04

Information about DiseaseUpdate04

Published on October 4, 2007

Author: Haralda

Source: authorstream.com

Content

DISEASE UPDATE 04 Paul E. Bertrand:  DISEASE UPDATE 04 Paul E. Bertrand SPOTTED WILT:  SPOTTED WILT TILLAGE TRANSPLANTS ADMIRE ACTIGARD TILLAGE :  TILLAGE FIELD WEEDS WHEAT (GRASSES) AS A TSWV SOURCE:  WHEAT (GRASSES) AS A TSWV SOURCE 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. 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. 2. WHEAT IS NOT A TSWV HOST. TSWV:  TSWV ACQUIRED FOR TRANSMISSION ONLY BY JUVENILES and --- TSWV:  TSWV NECESSARY JUVENILE STAGE EXISTS ONLY 12 - 15 HRS. so --- TSWV:  TSWV TO TRANSMIT TSWV LATER THRIPS MUST HATCH ON OR NEAR INFECTED PLANTS 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. 2. WHEAT IS NOT A TSWV HOST. 3. TOBACCO THRIPS HATCHED ON WHEAT HAVE NO OPPORTUNITY TO ACQUIRE TSWV. Slide11:  IN FIELD WEED MANAGEMENT IN FIELD WEED MANAGEMENT:  IN FIELD WEED MANAGEMENT CLEAN ROWS WEEDY ROWS WHEAT ROWS IN FIELD WEED MANAGEMENT:  IN FIELD WEED MANAGEMENT 2 ROW 4 ROW 8 ROW TOBACCO Slide16:  2004 EARLY WEEDS SUMNER: 42/90 ELISA+ GRINER: 58/90 ELISA+ EFFECT OF COVER ON SPOTTED WILT :  EFFECT OF COVER ON SPOTTED WILT NEXT TO COVER EFFECT OF COVER ON SPOTTED WILT :  EFFECT OF COVER ON SPOTTED WILT NEXT TO COVER EFFECT OF COVER ON SPOTTED WILT :  EFFECT OF COVER ON SPOTTED WILT NEXT TO COVER Slide20:  WHEAT SUMNER: 0/90 ELISA+ GRINER: 0/90 ELISA+ Slide21:  REDISTRIBUTION OF ADULT THRIPS FROM WHEAT ? SUMNER FARM:  SUMNER FARM ROW FROM COVER % TSWV GRINER FARM:  GRINER FARM ROW FROM COVER % TSWV WHEAT (GRASSES) AS A TSWV SOURCE:  WHEAT (GRASSES) AS A TSWV SOURCE 1. NOT A SOURCE but 2. CAN PLAY A ROLE TILLAGE :  TILLAGE STRIP TILL Slide27:  2001 -2003 RESULTS :  RESULTS % TSWV but--- Slide29:  2004 LITTER LEFT STANDING Slide31:  LAY BY LITTER CUT OUT 5 WEEKS POST TP 2004 RESULTS :  2004 RESULTS % TSWV HOUSE PLANTS vs BED PLANTS:  HOUSE PLANTS vs BED PLANTS Slide34:  ARE THE PLANTS THEMSELVES DIFFERENT ? HOUSE vs BED PLANTS:  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) 2003 PLANT TRIAL RESULTS:  2003 PLANT TRIAL RESULTS INFECTED TRANSPLANTS:  INFECTED TRANSPLANTS HOUSE 0 - 1 % 2/5 LOTS HAD ONE ELISA+ PLANT INFECTED TRANSPLANTS:  INFECTED TRANSPLANTS HOUSE 0 - 1 % BED 0 % 2/5 LOTS HAD ONE ELISA+ PLANT EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % TSWV EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % TSWV EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % STAND EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % STAND EXPECTED RESULTS:  EXPECTED RESULTS BETTER RESPONSE TO TPW ADMIRE WITH HOUSE PLANTS SOME STAND LOSS WITH BED PLANTS & TPW ADMIRE UNEXPECTED RESULTS:  UNEXPECTED RESULTS MORE INFECTED HOUSE PLANTS MORE TSWV WITH HOUSE PLANTS 2004 PLANT TRIAL RESULTS:  2004 PLANT TRIAL RESULTS EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % TSWV EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % TSWV EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % STAND EFFECT OF PLANT SOURCE:  EFFECT OF PLANT SOURCE % STAND 2004 RESULTS SIMILAR TO 2003:  2004 RESULTS SIMILAR TO 2003 MORE TSWV WITH HOUSE PLANTS BETTER RESPONSE TO TPW ADMIRE WITH HOUSE PLANTS SOME STAND LOSS WITH BED PLANTS & TPW ADMIRE INFECTED TRANSPLANTS:  INFECTED TRANSPLANTS HOUSE 1 - 4 96 INFECTED TRANSPLANTS:  INFECTED TRANSPLANTS HOUSE 1 - 4 BED 0 - 6 96 96 2004 RESULTS:  2004 RESULTS SIMILAR TSWV INFECTION IN BED AND HOUSE PLANTS NO CORRELATION BETWEEN ELISA+ TRANSPLANTS AND: STAND LOSS EARLY TSWV FINAL TSWV ADMIRE:  ADMIRE Slide55:  FLOAT HOUSES ~ 65 % OF PLANTS ADMIRE DRENCH TRT. ~ 90 % SUCCESS Slide56:  PLANT BEDS ~ 30 % OF PLANTS ADMIRE TPW TRT. ~ 55 % SUCCESS ADMIRE:  ADMIRE BOTH METHODS CONTROL LATER APHIDS 2004 APPLICATION OF PROVADO TO PLANT BEDS:  2004 APPLICATION OF PROVADO TO PLANT BEDS 2004 TRIALS (4):  2004 TRIALS (4) Slide60:  T-RAIL HOUSES ~ 5 % OF PLANTS ADMIRE DRENCH TRT. ~ 35 % SUCCESS T-RAIL HOUSES:  T-RAIL HOUSES IS IRRIGATION WASHING ADMIRE OUT OF TRAYS ? 2004 TRIALS (6):  2004 TRIALS (6) NOT MUCH TREATMENT DIFFERENCE ACTIGARD: :  ACTIGARD: TRANSPLANT TREATMENT ACTIGARD + ADMIRE:  ACTIGARD + ADMIRE ACTIGARD TREATMENT (HOUSE PLANTS):  ACTIGARD TREATMENT (HOUSE PLANTS) 1.0 oz. / 100,000 PLANTS SPRAY ON 7 - 14 DAYS PRE TP SET IN PRE WETTED BEDS ACTIGARD: :  ACTIGARD: FIELD SPRAYS 2002 TRIALS (9):  2002 TRIALS (9) 2002 RESULTS:  2002 RESULTS FINAL % TSWV 2004 TRIALS (8):  2004 TRIALS (8) 2004 TRIALS (8):  2004 TRIALS (8) 2004 RESULTS:  2004 RESULTS FINAL % TSWV ACTIGARD FIELD SPRAYS:  ACTIGARD FIELD 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:  BLACK SHANK BLACK SHANK :  BLACK SHANK RACE 1 SITUATION Slide75:  BLACK SHANK RACE 1 DISASTER NEW RACE 0 RESISTANCE IS BASED ON A SINGLE GENE :  NEW RACE 0 RESISTANCE IS BASED ON A SINGLE GENE and --- ALL HIGH RESISTANCE VARIETIES HAVE THIS GENE:  ALL HIGH RESISTANCE VARIETIES HAVE THIS GENE NC-71 Sp G168 NC-72 Sp GH20 NC-297 etc. CONTINUOUS PLANTING THESE VARIETIES WILL SELECT RACE 1:  CONTINUOUS PLANTING THESE VARIETIES WILL SELECT RACE 1 BLACK SHANK RACE 1 :  BLACK SHANK RACE 1 MAINTAIN OR INCREASE ROTATION TIME and --- ALTERNATE HIGH RES. WITH K-346 BLACK SHANK RACE 1 :  BLACK SHANK RACE 1 MAINTAIN OR INCREASE ROTATION TIME and --- ALTERNATE HIGH RES. WITH K-346 and --- USE RIDOMIL:  USE RIDOMIL 2001 BROOKS CO. BLACK SHANK TRIAL :  2001 BROOKS CO. BLACK SHANK TRIAL % BLACK SHANK 2001 BROOKS CO. BLACK SHANK TRIAL :  2001 BROOKS CO. BLACK SHANK TRIAL % BLACK SHANK

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