Lessons learned from Pam Charbonneau OMAF and MRA Turfgrass Specialist

Transcription

1 Lessons learned from 2013 Pam Charbonneau OMAF and MRA Turfgrass Specialist

2 New OMAF Publication 384 Protection Guide Web only Available Spring 2014 Soil fertility, water management will be incorporated in a new Turf IPM Manual

3 Continued in 2013 ONturf - twitter

4 ONturf Blog ONturf Timely You can send me comments

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8 Objectives: Annual bluegrass weevil adult monitoring Local data on ABW spring migration A better understanding of ABW biology Observe flowering plants in the landscape that coincide with key events of ABW migration and insecticide timing More accurate timing of insecticide control using chlorantraniliprole

9 Annual bluegrass weevil adult monitoring

10 Technique Soap flushes 3x a week From May 1, 2013 to July 2, 2013 GTI pathology green Kept track of flowering plants during this period Within 1 m of tree lined edge

11 Emily Hartwig summer student extraordinaire!

12 Some of the plants that were tracked

13 01-May May May May May May May May May May May May May May May May Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jul-13 No. of adults 60 ADULT ABW SAMPLING GTI

14 Adult ABW migration pattern Bimodal migration First migration wave peaked on May 6th, 2013 Second wave peaked on May 31 st, 2013 Move from tree line through rough and congregate at fairway edges

15 ABW Migration Events and Plant Phenology Indicators 1 st peak adult migration Event Species Flowering Stage Photo Forsythia Full bloom Magnolia Early bloom Serviceberry Full bloom

16 ABW Migration Events and Plant Phenology Indicators Event Species Flowering Stage Photo 2nd peak adult migration Horse chestnut Full bloom Bridal wreath spirea Early bloom Iris Full bloom

17 Chlorantraniliprole Timing and Plant Phenology Indicators Event Species Flowering Stage Photo Chlorantraniliprole application start date Peony Full bloom Magnolia Full bloom Red Bud Full bloom

18 Chlorantraniliprole Timing and Plant Phenology Indicators Event Species Flowering Stage Photo Chlorantraniliprole application end date Lilac Late bloom Iris Full bloom Honeysuckle Early bloom

19 RTF, RPR and Home Lawn Mix Trial Collaborator Dr. Michael Brownbridge, VRIC Seeded Sept. 21, 2011 at GTI Rhizomatous tall fescue kg/100m2 Regenerative perennial ryegrass 3.0 kg/100m2 Home lawn mixture (50% Kentucky bluegrass, 20% perennial ryegrass 30% fine fescue) 2.0 kg/100m2 Irrigated plots were irrigated to supply 25 mm of water in a one week period during June, July and August

20 RTF, RPR and Home Lawn Mix Trial Fertility Fertilized 3 x per season at a rate of 50kg/ha of N Mowing Mowed weekly at 5 cm height of cut

21 RTF, RPR and Home Lawn Mix Trial Fall 2012

22 RTF, RPR and Home Lawn Mix Trial Data Point quadrats monthly summer of 2012 and 2013 % Rhizomatous tall fescue % Regenerative perennial ryegrass % Kentucky bluegrass/ perennial ryegrass and fine fescue in home lawn mixture % broadleaf weeds % bare % dead/brown % annual bluegrass (2013)

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24 Irrigated plot Each irrigated plot was irrigated separately with a flow meter and hose end nozzle.

25 Rain and irrigation for June mm of Rain for the month of June Irrigation events June

26 Rain and irrigation for July All plots mm of rain Irrigation July

27 Plots July 2012

28 Date 29-May May May Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun Jun 24-Jun Jun Jun Jun Jun Jun Jun-13 Date Precipitation (mm) 35 Rainfall for June 2013 (mm/day) Date

29 Precipitation (mm) 45 Rainfall for July 2013 (mm/day) Date

30 % species composition 120 Percent species composition Aug. 4th, 2012 Percent species composition Oct. 18, Dead/Brown TF KB FF Bare TF FF PR PR 40 Bare KB BLW BLW 20 0

31 RTF Non-irrigated RTF Irrigated RPR Non-irrigated RPR Irrigated

32 Conclusions: Mid-summer 2012 Non-irrigated rhizomatous tall fescue Less dead/brown during the drought period than nonirrigated HLM or RPR Irrigated rhizomatous tall fescue Had the most broadleaf weeds >64% vs. 31% for HLM and RPR

33 Conclusions: Year 1 Non-irrigated rhizomatous tall fescue >40 % broad leaf weeds 20% bare 10% tall fescue Irrigated rhizomatous tall fescue <25% broadleaf weeds <65% tall fescue Almost no bare ground

34 Conclusions: Year 1 Non-irrigated regenerative perennial ryegrass 30% bare 52% perennial ryegrass 12% BLW (far fewer than RTF) Irrigated regenerative perennial ryegrass Almost no bare ground 89% perennial ryegrass 9% BLW

35 Non-irrigated home lawn mix Conclusions: Year 1 37% bare 16% broad leaf weeds 20 % perennial ryegrass 20% fine fescue 0.5% Kentucky bluegrass Irrigated home lawn mix No bare ground 16%broad leaf weeds 40% fine fescue 33% perennial ryegrass 11% Kentucky bluegrass

36 Conclusions: Year 1 Non-irrigated Greatest % bare ground

37 % species composition % species composition 100 % Species composition May 21, % % Species composition Oct. 11, % 80 80% 70 70% 60 60% Bare AB TF FF PR KB BLW 50% 40% 30% 20% Bare AB TF FF PR KB BLW 10 10% 0 0% Treatments Treatments

38 % species composition % species composition 100 % Species composition May 21, % % Species composition Oct. 11, % 80 80% 70 70% 60 60% Bare AB TF FF PR KB BLW 50% 40% 30% 20% Bare AB TF FF PR KB BLW 10 10% 0 0% Treatments Treatments

39 % species composition % species composition 100 % Species composition May 21, % % Species composition Oct. 11, % 80 80% 70 70% 60 60% Bare AB TF FF PR KB BLW 50% 40% 30% 20% Bare AB TF FF PR KB BLW 10 10% 0 0% Treatments Treatments

40 Conclusions: Year 2 Non-irrigated rhizomatous tall fescue Weak spreader 20% annual bluegrass Irrigated rhizomatous tall fescue Good overall cover of tall fescue Out-competed broadleaf weeds Very little annual bluegrass

41 Conclusions: Year 2 Non-irrigated regenerative perennial ryegrass Weak spreader 10% bare Irrigated regenerative perennial ryegrass 95% perennial ryegrass

42 Conclusions: Year 2 Non-irrigated home lawn mix Very little bare annual bluegrass16% 25 % perennial ryegrass 50% fine Kentucky bluegrass Irrigated home lawn mix ~ 1/3 Kentucky bluegrass, 1/3 fine fescue, 1/3 perennial ryegrass

43 Ideal growing conditions in 2013 Conclusions: Year 2 All species irrigated and non-irrigated out-competed broadleaf weeds RTF and RPR showed evidence of weak spreading

44 Grubs HLM Nonirrigated HLM Irrigated

45 Grub assessment Cup changer 6 plugs per 2 x 2 m plot in 2012 and 4 plugs in 2013 Taken in November Visual assessment of digging Visual rating Taken in November

46 Number of grubs 14 Mean # of grubs/0.1m2 in Mean # of grubs 0.1m Treatment

47 Any thoughts?????

48 Anecdotal information 2012 Irrigation effect Irrigated RTF and HLM plots had more grubs Better egg survival or female adults preferred laying there Skunk digging preference Irrigated home lawn mix plots were preferred by skunks Species composition easier to dig (fine fescue)

49 Anecdotal information Grub infestation vs. species or irrigation Overall no trend!

50 Opportune Bioherbicide (MBI-005) Thaxtomin compound produced by Streptomyces acidiscabies RL-110 T Works by disrupting cellulose biosynthesis Selective control of broadleaves and sedges (but not nutsedge) postemergence; Good safety to turf, wheat, corn, rice Potent broad spectrum pre-emergence activity based upon seed size, soil type very important to activity Shows synergistic activity with several chemical herbicide chemistries US EPA approval 2012; PMRA listed Dec Launch 2014? Poa annua Untreated MBI 005

51 MBI-005 Shows Good Pre-Emergent Activity Common name Scientific name Efficacy Rating + to ++++ Crabgrass Digitaria sanguinalis ++++ Bluegrass Poa annua +++ Perennial Ryegrass Lolium perenne ++ Ragweed Ambrosia artemisifolia ++++ Plantain Plantago lanceolata ++++ Mustard Brassica kaber ++++ Lambsquarters Chenopodium album +++ rating symbol % Germination Poor Fair Good Very Good

52 Acknowledgements Dr. Michael Brownbridge, Paul Coté and Taro Saito, VRIC Ken Carey, GTI Karen Montgomery-Wilson and Emily Hartwig, OMAFRA SEP Peter Coons, Quality Seeds and Tim Johnson, Marrone Bio-Innovations

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