WEED MANAGEMENT PROGRAMS FOR FIELD- GROWN NURSERY STOCK JOHN AHRENS EMERITUS PLANT SCIENTIST CONNECTICUT AGRICULTURAL EXPERIMENT STATION WINDSOR
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1 WEED MANAGEMENT PROGRAMS FOR FIELD- GROWN NURSERY STOCK JOHN AHRENS EMERITUS PLANT SCIENTIST CONNECTICUT AGRICULTURAL EXPERIMENT STATION WINDSOR
2 SITE PREPARATION APPLY ROUNDUP 2 TO 3 TIMES THE YEAR BEFORE PLANTING TREAT EXISTING WEED GROWTH; DO NOT TILL BETWEEN TREATMENTS; RETREAT AFTER REGROWTH OCCURS. NOT EFFECTIVE ON NUTSEDGE. THE TIME TO CONTROL MOST PERENNIAL WEEDS IS BEFORE PLANTING. FUMIGATION MAY BE NECESSARY IN HIGH VALUE CROPS,SUCH AS IN BEDS TO CONTROL YELLOW NUTSEDGE AND MUGORT.
3 PREEMERGENCE GRASS HERBICIDES SURFLAN - ORYZALIN BARRICADE - PRODIAMINE PENDULUM / HURDLE - PENDIMETHALIN TRILIN / TREFLAN - TRIFLURALIN DEVRINOL - NAPROPAMIDE PENNANT MAGNUM - S- METOLACHLOR PREDICT - NORFLURAZON
4 PREEMERGENCE BROADLEAF HERBICIDES PRINCEP & OTHERS SIMAZINE- FOR MANY WOODY ORNAMENTALS. GOAL 2XL-OXYFLUORFEN FOR CONIFERS AND SHADE TREES. GALLERY 75 DF- ISOXABEN FOR MANY ORNAMENTALS,INCLUDING SOME PERENNIALS. RONSTAR 2G-OXADIAZON OXADIAZON-FOR WOODY ORNAMENTALS.
5 COMBINING PRE BROADLEAF & PRE GRASS HERBICIDES CAN GIVE BROAD-SPECTRUM CONTROL PRINCEP PLUS SURFLAN, PENDULUM BARRICADE OR PENNANT. GALLERY PLUS SURFLAN,PENDULUM OR BARRICADE. GOAL PLUS PENNANT GRANULAR COMBINATIONS-RONSTAR PLUS DEVRINOL,PRE-PAIR,SNAPSHOT PAIR,SNAPSHOT TG, OH-2, ETC.
6 BROAD SPECTRUM PREEMERGENCE HERBICIDES CASORON 4G- DICHLOBENIL-FOR ANNUAL AND PERENNIAL WEEDS IN WOODY ORNAMENTALS. SUREGUARD 51DG AND BROADSTAR.25 G- FLUMIOXAZXIN -FOR ANNUAL GRASS AND BROADLEAF WEEDS, PRIMARILY IN WOODY ORNAMENTALS.
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9 Control escapes before they spread
10 Slide 9 J.F.A1 John F. Ahrens, 12/28/2005
11 SureGuard Sprays at 8, 16 and 32 oz/a on Shrub Liners on April 2 Caused early necrosis and suppression on Viburnum nanum Farreri when applied during bud swell. Recovery was complete in 2 months. Caused no early injury to dwarf winged euonymus (EAC) when applied when buds were tight (dormant).however,plant vigor was reduced 20% by mid- summer,only at 32oz product/a.
12 Fat buds of viburnum prone to SureGuard injury
13 Untreated
14 SureGuard injury
15 Timing study
16 SureGuard Injury to hemlock at bud break
17 SureGuard injury to hemlock in June
18 Crabgrass & C. ragweed seedlings
19 2 weeks after SureGuard
20 Results of Timing Study SureGuard gave excellent preemergence and early postemergence control of crabgrass and ragweed. SureGuard caused no visual injury to the arborvitae, junipers or Taxus at any date. Eastern hemlock was injured only slightly at budbreak but was severely injured during active growth in June or July.No injury occurred in October.
21 Observations Flumioxazin (SureGuard)) did not control yellow nutsedge or quackgrass,but did control seedling poplars.
22 SureGuard Summary Susceptible woody ornamentals include actively growing deciduous plants and some actively growing conifers such as firs and hemlock ; also Colorado spruce and poplars from seed Tolerant woody ornamentals include dormant deciduous and conifers and some actively growing conifers such as juniper, arborvitae and Taxus. When we consider its efficacy in controlling many important weeds it is safe to say that SureGuard will be an extremely useful tool for weed management in woody plants.
23 POSTEMERGENCE HERBICIDES BROAD SPECTRUM-NON NON-SELECTIVE - ROUNDUP-GLYPHOSATE FINALE -GLUFOSINATE CERTAIN BROADLEAF- LONTREL-CLOPYRALID GRASSES-FUSILADE FUSILADE-FLUAZIFOP-P-BUTYL VANTAGE-SETHOXYDIM ENVOY -CLETHODIM
24 SHIELDED SPRAYS OF ROUNDUP WILL BECOME MORE COMMON: a) TO REDUCE COSTS. b) TO REDUCE RISKS OF LEACHING. c) TO IMPROVE CONTROL OF PERENNIAL WEEDS.
25 MANKAR ULV SPRAYERS APPLY UNDILUTED ROUNDUP AT ABOUT 1 QUART/A. A SHIELDED CONTROLLED DROPLET APPLICATOR (CDA).
26 Shielded sprayer
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29 SUCCESSFUL WEED MANAGEMENT REQUIRES IDENTIFYING THE PROBLEM WEEDS. SELECTING HERBICIDES FOR THE WEEDS AND THE CROPS. TIMING-ACCORDING TO HERBICIDE ACTION. RAINFALL OR IRRIGATION TO ACTIVATE PREEMERGENCE HERBICIDES.
30 THE MOST SUCCESSFUL GROWERS HAVE HERBICIDE / PESTICIDE OR PLANT HEALTH MANAGERS WEEDS SHOULD NOT TAKE A BACK SEAT TO DIGGING AND SHIPPING!
31 VALUABLE REFERENCES WEED IDENTIFICATION WEEDS OF THE NORTHEAST- CORNELL UNIV. PRESS. HERBICIDE PROPERTIES & USES WEED CONTROL SUGGESTIONS FOR CHRISTMAS TREES, WOODY ORNAMENTALS AND FLOWERS- N.C. STATE UNIV. RALEIGH.
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