Microstegium vimineum. Microstegium vimineum Management and Impacts on Native Plant Communities. Current management guidelines.

Transcription

1 Mirostegium vimineum Mngement nd Impts on Ntive Plnt Communities Cren A. Judge, Joseph C. Nel, Theodore H. Sher, nd Jeffrey F. Derr North Crolin Stte University Mirostegium vimineum Jpnese stiltgrss Summer nnul invsive grss (Poee) C 4, shde-tolernt Wetlnds, woodlnds, utility esements, lwns, lndspes Objetives To use n biologil nd eologil bsed reserh progrm to mke sound mngement reommendtions for Jpnese stiltgrss Current mngement guidelines Prevent seed prodution (Tu ) Methods (lte-seson) Hnd-removl Mehnil (mow) Nonseletive herbiide ( glyphoste) Questions nd onerns? Lte-seson ontrol llows ompetition to redue ntive speies Non-seletive methods (Roundup nd mowing) kill ntive speies Mngement must be timely 4 Dy Length (hours) 1 (2-4) Dy of Eh Month

2 4 Dy Length (hours) 1 (2-4) Dy of Eh Month 4 Dy Length (hours) 1 Approximte florl indution (2-4) Dy of Eh Month 4 Dy Length (hours) 1 Approximte florl indution (2-4) Dy of Eh Month Seed development Ot. 7 Ot. 21 Nov. 2 Nov. Hrvest infloresenes t vrious times in the reprodutive yle Germintion of immture seed Colletion Dte Ot. 7 Ot. 21 Nov. 2 Nov. % Germintion 57b 7 1 Stiltgrss PRE Control 8 WAT Brride Surfln XL Pendulum Preen Snpshot Ronstr Tem Pro Devrinol Pennnt *** LSD= P=.5 Perent ** *

3 Stiltgrss & Crbgrss PRE Control Brride Surfln XL Pendulum Preen Snpshot Ronstr Tem Pro Devrinol Pennnt stiltgrss rbgrss Perent Stiltgrss POST Control 8 WAT Finle Vntge Fusilde II Alim Extr Envoy Bueno 6 Drive *** *** ** LSD= P=.5 Perent * Stiltgrss & Crbgrss POST Control Finle Vntge Fusilde II Alim Extr Envoy Bueno 6 Drive stiltgrss rbgrss Perent Timing experiment Herbiides Alim Extr Vntge Plteu Timing Erly seson Mid seson Lte seson Dt olletion & nlysis Timing: Herbiide effet 2 yers (2 & 3) 2 lotions (NC nd VA) RCBD, 4 replitions, ANOVA Perent ontrol ( 2 nd 3) Perent seedhed redution ( 3) Perent stnd redution (My 4) Perent Control Herbiide NS Timing NS Biomss Redution Herbiide NS Timing NS Seedhed Redution 3 Herbiide.1 Timing NS b b Stnd Redution 4 Alim Vntge Plteu

4 Timing effet Ot 3 Nontreted Alim Extr: June Alim Extr: My Alim Extr: August Herbiide, rte, nd frequeny Non-treted Vntge 1X-2 pps 2 yers (NC) Herbiides Alim Extr Vntge Rtes - 1/2X, 1X # Applitions 1 pplition (mid-seson) 2 pplitions (4 wk intervl) Herbiide, rte, nd frequeny 1 ANOVA: Yer (NS), Herbiide (NS), Rte (P =.3), Frequeny (P <.1), Rte*Frequeny (P =.3) Herbiide, rte, nd frequeny Ot 3 Perent Control 6 4 Nontreted Vntge 1/2X: 1 pp Vntge 1/2X: 2 pp 1/2 X 1 pp 1/2 X 2 pps 1X 1 pp 1X 2 pps Vntge 1X: 1 pp Vntge 1X: 2 pp Summry Conventionl vs. seletive All three seletive herbiides were effetive t eh pplition timing Multiple pplitions were more effetive thn single pplitions (whether 1/2X or 1X) Hndweed: August : August Mow: August Alim Extr: June x2

5 Dt olletion & nlysis Perent over: 2 to 4 Mid-summer Lte-summer Soil ores: 2 to 4 2 per plot (1 x 5 m) Identified speies # of individuls ANOVA (P.5) Seletive vs. nonseletive 2 Alim Extr August November Seletive vs. nonseletive 3 Alim Extr Seletive vs. nonseletive 4 Alim Extr July September June September End of 3 rd seson omprisons Alim Extr nontreted Perent Jpnese stiltgrss over: Duke Forest NS Yer 2 Yer 3 b b b b k mow lte hnd lte hnd ll ll

6 Perent Herbeous diot over: Duke Forest b b b b b Yer 2 Yer 3 k mow lte hnd lte hnd ll ll Herbeous diot over: Duke Forest 2 1% % 6% 4% % % ll other (<%) flse nettle mphor weed Am. burnweed dogfennel Herbeous diot over: Duke Forest 3 1% % 6% 4% % % ll other (<%) flse nettle mphor weed Am. burnweed dogfennel Herbeous diot over: Duke Forest 4 1% % 6% 4% % % ll other (<%) flse nettle mphor weed Am. burnweed dogfennel Summry Jpnese stiltgrss All tretments effetive ontrol & seed bnk redution Herbeous diots Greter diversity in seletive tretment The future? Wht will hppen fter we ontrol Jpnese stiltgrss? Will re-estblished plnt ommunities be less suseptible to invsion? Cn we truly exhust the seed bnk?

7 Questions??