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OUST EXTRA COMBINATIONS FOR HERBACEOUS WEED CONTROL AND LOBLOLLY PINE SEEDLING PERFORMANCE J.L. YEISER STEPHEN F. AUSTIN STATE UNIVERSITY A.W. EZELL MISSISSIPPI.

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Presentation on theme: "OUST EXTRA COMBINATIONS FOR HERBACEOUS WEED CONTROL AND LOBLOLLY PINE SEEDLING PERFORMANCE J.L. YEISER STEPHEN F. AUSTIN STATE UNIVERSITY A.W. EZELL MISSISSIPPI."— Presentation transcript:

1 OUST EXTRA COMBINATIONS FOR HERBACEOUS WEED CONTROL AND LOBLOLLY PINE SEEDLING PERFORMANCE J.L. YEISER STEPHEN F. AUSTIN STATE UNIVERSITY A.W. EZELL MISSISSIPPI STATE UNIVERSITY

2 INTRODUCTION IMPACT OF HWC WIDELY TESTED WELL DOCUMENTED COMMONLY ACCEPTED PRACTICE JUSTIFIES CONTINUED REFINEMENT

3 CLARIFICATION VELPAR DF=VELPAR OUST XP=OUST ESCORT XP=ESCORT ARSENAL AC=ARSENAL

4 OBJECTIVE TO COMPARE: ARSENAL, ESCORT, OUST, AND VELPAR MIXTURES FOR: HWC AND PINE GROWTH

5 METHODS STURGIS, MSNACOGDOCHES, TX PHYSIOGRAPHYUPPER CP SOILRUSTON FINE SANDY LOAM pH 5.3 SANDY CLAY LOAM OVER CLAY LOAM pH 5.0 PREVIOUS STANDNATURALPLANTATION HARVESTED2001DEC-00

6 METHODS STURGIS, MSNACOGDOCHES, TX SITE PREP #1APR-02 MAY-02 4 LB ULWSINGLE CHOP SITE PREP #2SEP-02JUN-02 BURNARSENAL+ACCORD+REBOUND 16+64+32OZ @ 10 GPA PLANTEDJAN-03 HAND BARE ROOT DEC-02 MACHINE BARE ROOT

7 METHODS STURGIS, MS 13-APR-03 NACOGDOCHES, TX 8-APR-03 BAREGROUND<50%60% FORBS+GRASSES35%15%+8% FORBSCOMMON RAGWEED HORSEWEEDWOOLY CROTON LATE BONESET GRASSESBROOMSEDGEPANICUMS WOOLY PANIC GRASS WOODY15% SWEETGUM, OAKS<1% SWEETGUM, OAKS SEMI-WOODYAMERICAN BEAUTYBERRY NONE RUBUS<1%15%

8 NACOGDOCHES, TX 8-JUN-03 60 DAT OUSTAR 13ozCHECK ARSENAL+OUST+ESCORT 6+3+1oz

9 NACOGDOCHES, TX 8-JUN-03 60 DAT OUST+ESCORT 3+1oz ARSENAL 6oz ARSENAL+OUST+ESCORT 6+3+1oz

10 NACOGDOCHES, TX 8-JUL-03 90 DAT CHECK OUSTAR 13oz

11 NACOGDOCHES, TX 8-JUL-03 90 DAT CHECK ARSENAL+OUST+ESCORT 6+3+1oz

12 NACOGDOCHES, TX 8-OCT-03 180 DAT CHECK ARSENAL+OUST+ESCORT 6+3+1oz OUSTAR 13oz

13 STURGIS, MS ARSENAL+OUST+ESCORT 6+3+1oz 13-JUN-03 60 DAT

14 STURGIS, MS ARSENAL+OUST+ESCORT 6+3+1oz 13-JUL-03 90 DAT

15 STURGIS, MS ARSENAL+OUST+ESCORT 6+3+1oz 13-AUG-03 120 DAT

16 STURGIS, MS ARSENAL+OUST+ESCORT 6+3+1oz 13-SEP-03 150 DAT

17 MONTHLY RAINFALL TOTALS NEAR NACOGDOCHES, TX 2003

18 NACOGDOCHES, TX BAREGROUND8-MAY-03 30 DAT 8-JUN-03 60 DAT 8-JUL-03 90 DAT 8-OCT-03 180 DAT CHECK26f24g 4d2e OUST 1383a74bcdef28c24bcd VO 21.33+276ab76bcde31bc23bcd VO 10.67+174abc61f26c18bcde AR 660cde66ef18cd10de AR 446e70cdef18cd13cde O+E 3+154de74bcdef23c19bcde O+E 2.25+.7556de69def21c19bcde A+O+E 6+3+181a94a66a44a A+O+E 6+2.25+.7569bcd83ab45b32abc A+O+E 4+3+165bcd86abc45b36ab A+O+E 4+2.25+.7556de80bcd28c19bcde

19 NACOGDOCHES, TX ARSENAL Bareground 30 DAT60 DAT90 DAT120 DAT180 DAT 456a78a30a26a23a 670a82a43a38a28a Grass Cover 47a4a7a11a14a 68a3a5a10a Forb Cover 413a12a49a47a52a 6 9a 41a44a45a Rubus Cover 418a16a19a 23a 610a14a17a 21a

20 NACOGDOCHES, TX c b a Duncan’s New Multiple Range Test b ab a b a a c b a b a

21 NACOGDOCHES, TX b ab a Duncan’s New Multiple Range Test b ab a b a b a a b a b

22 NACOGDOCHES, TX b b a Duncan’s New Multiple Range Test b b a b a a b a b b a b

23 NACOGDOCHES, TX SEEDLING SURVIVAL TREATMENTSS1 (%)S2 (%)S3 (%) A+O+E 4+3+1oz100a 99a A+O+E 6+2.25+.75oz 98ab 98a96a A+O+E 6+3+1oz100a A+O+E 4+2.25+.75oz 96ab 94a OUSTAR 13oz 98ab 98a VO 10.67+1oz 98ab 96a94a VO 21.33+2oz 96ab 96a O+E 3+1oz 92b 92a O+E 2.25+.75oz100a AR 6oz 96ab 96a AR 4oz100a 90a CHECK100a 98a

24 NACOGDOCHES, TX TOTAL HEIGHT TREATMENTSHT1 (FT)HT2 (FT)HT3 (FT) OUSTAR 13oz1.93a5.32a8.07a A+O+E 4+3+1oz 1.84ab5.32ab8.14a VO 10.67+1oz 1.77abc5.08abc7.91a A+O+E 6+2.25+.75oz 1.75abc4.86abc7.71a A+O+E 6+3+1oz 1.75abc5.03abc8.01a VO 21.33+2oz 1.72bc4.95abc7.54a O+E 2.25+.75oz 1.63cde4.57abcd7.91a AR 6oz 1.66bcd4.48abcd7.11ab A+O+E 4+2.25+.75oz 1.60cde4.70abcd7.34ab AR 4oz 1.47de4.07cd6.88ab O+E 3+1oz1.44e4.30bcd6.69ab CHECK1.43e3.72d6.03b

25 NACOGDOCHES, TX GROUND LINE DIAMETER TREATMENTSGLD1 (IN)GLD2 (IN)GLD3 (IN) A+O+E 6+3+1oz0.420a1.31ab2.07ab A+O+E 4+3+1oz 0.414ab1.36a2.12a OUSTAR 13oz 0.409abc1.36a2.09ab A+O+E 6+2.25+.75oz 0.399abc1.24abc2.04abc VO 21.33+2oz 0.379abcd1.24abc1.96abc VO 10.67+1oz 0.374bcd1.19abc1.87abc O+E 2.25+.75oz 0.361cde1.14abc1.96abc AR 6oz 0.352de1.06abcd1.73abc A+O+E 4+2.25+.75oz 0.346ef1.09abcd1.76abc O+E 3+1oz 0.326ef1.01bcd1.68bcd AR 4oz0.294f0.96cd1.64cd CHECK0.293f0.80d1.32d

26 NACOGDOCHES, TX VOLUME INDEX TREATMENTSVI1 (FT 3 X10 -3 )VI2 (FT 3 x10 -2 )VI3 (FT 3 ) A+O+E 4+3+1oz2.76a7.81a.281a A+O+E 6+2.25+.75oz2.73a6.79ab.264a OUSTAR 13oz2.63a7.57a.261a A+O+E 6+3+1oz2.40a6.79ab.262a VO 10.67+1oz2.15ab5.76abc.210ab VO 21.33+2oz2.04ab6.06abc.221ab O+E 2.25+.75oz2.04ab5.01abcd.243ab A+O+E 4+2.25+.75oz1.54bc4.55abcd.180abc AR 6oz1.98ab4.23bcd.173abc O+E 3+1oz1.37bc4.06bcd.165abc AR 4oz0.98c3.12cd.140bc CHECK1.09c2.15d.088c

27 Duncan’s New Multiple Range Test NACOGDOCHES, TX c a b ab b a b a 8.1 7.0 7.5

28 Duncan’s New Multiple Range Test NACOGDOCHES, TX c a b ab b a b a 2.10 1.90 1.69

29 Duncan’s New Multiple Range Test NACOGDOCHES, TX b a ab NS c a ab

30 NACOGDOCHES, TX TREATMENTSJUNE MEAN BAREGROUND MEAN VI (FT 3 ) A+O+E 6+3+1oz69.262 A+O+E 6+2.25+.75oz56.264 A+O+E 4+3+1oz55.281 OUSTAR 13oz49.261 VO 21.33+2oz48.221 VO 10.67+1oz44.210 A+O+E 4+2.25+.75oz43.180 O+E 3+1oz42.165 O+E 2.25+.75oz41.243 AR 6oz38.173 AR 4oz36.140 CHECK21.088

31 STURGIS, MS BAREGROUND13-MAY-03 30 DAT 13-JUN-03 60 DAT 13-JUL-03 90 DAT 13-SEP-03 150 DAT CHECK26f24g 4d2e OUSTAR 1383a74bcdef28c24bcd VO 21.33+276ab76bcde31bc23bcd VO 10.67+174abc61f26c18bcde AR 660cde66ef18cd10de AR 446e70cdef18cd13cde O+E 3+154de74bcdef23c19bcde O+E 2.25+.7556de69def21c19bcde A+O+E 6+3+181a94a66a44a A+O+E 4+3+165bcd86abc45b36ab A+O+E 6+2.25+.7569bcd83ab45b32abc A+O+E 4+2.25+.7556de80bcd28c19bcde

32 STURGIS, MS GRASS COVER13-MAY-03 30 DAT 13-JUN-03 60 DAT 13-JUL-03 90 DAT 13-SEP-03 150 DAT CHECK21b15b12ab13ab OUSTAR 134a 1a 9a VO 21.33+25a 2a 2ab10ab VO 10.67+15a 2a 2ab 9ab AR 65a 1a1b9b AR 43a 2a2b7b O+E 3+13a 2a 2ab 19b O+E 2.25+.754a 1a 1ab20a A+O+E 6+3+16a 1a 1ab 9a A+O+E 4+3+11a 15a1a A+O+E 6+2.25+.751a 8a1a A+O+E 4+2.25+.753a 1a 11a

33 STURGIS, MS FORB COVER13-MAY-03 30 DAT 13-JUN-03 60 DAT 13-JUL-03 90 DAT 13-SEP-03 150 DAT CHECK53c85c90c94d OUSTAR 137a 6a36b69c VO 21.33+25a 2a14a60c VO 10.67+16a 8a41b65c AR 613b50b78c90d AR 421b49b80c88d O+E 3+14a 8a38b O+E 2.25+.753a 31b A+O+E 6+3+14a 2a 5a10a A+O+E 4+3+14a 2a 18ab A+O+E 6+2.25+.754a 6a35b A+O+E 4+2.25+.754a 3a 5a 20ab

34 AGE 1 & 2—STURGIS, MS TREATMENTSHT1 (FT)HT2 (FT)D1 (IN)D2 (IN) A+O+E 4+3+1oz1.84a5.30a.53a1.34a A+O+E 6+2.25+.75oz1.73ab4.90ab.37c1.22a A+O+E 6+3+1oz1.75ab5.05a.51a1.32a A+O+E 4+2.25+.75oz1.73ab5.13a.52a1.24a OUSTAR 13oz1.84a4.76b.43b1.12b VO 10.67+1oz1.70ab4.78b.38c1.06b VO 21.33+2oz1.52b4.33c.36c1.03b O+E 3+1oz1.60b4.57bc.42b1.11b O+E 2.25+.75oz1.69ab4.78b.43b1.09b AR 6oz1.61b4.21c.36c.91b AR 4oz1.63b4.51bc.41b.99b CHECK1.55b3.97c.32d.75c

35 AGE 1 & 2—STURGIS, MS TREATMENTSBAREGROUNDGLD (IN) A+O+E 6+3+1oz91.51 A+O+E 4+2.25+.75oz88.52 A+O+E 4+3+1oz87.53 O+E 2.25+.75oz82.43 A+O+E 6+2.25+.75oz83.37 O+E 3+1oz80.42 VO 21.33+2oz75.36 OUSTAR 13oz66.43 VO 10.67+1oz65.38 AR 6oz39.36 AR 4oz37.41 CHECK6.32

36 CONCLUSIONS NO HERBICIDE DAMAGE OBSERVED THREE-WAY MIXTURES: MOST BARE GROUND MORE MONTHS BG % GROWTH TXMS 1 A+O+E THREE-WAY MIXTURES11 2 HEX TWO-WAYS23 3 OUST EXTRA TWO-WAYS32 4 ARSENAL STAND ALONE44 5 CHECK55 Arsenal AC did not control Rubus and common ragweed Velpar DF+Oust XP did not control wooly croton and Rubus Escort XP controlled horseweed and Rubus and partial on wooly croton ACROSS BOTH SITES 3+1oz WAS BETTER THAN 2.25+.75oz

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