Herbicide selectivity in tree species used in plant restoration projects

Abstract

The lack of knowledge about the behavior of seedlings of native tree species in relation to the herbicide selectivity , coupled with the current strategies in restoration of degraded natural ecosystems , justifies the execution of this project. They will be tested 80 species that occur in semideciduous forests, and are widely used in restoration projects :Bauhinia forficata Link., Croton urucurana Bail., Guazuma ulmifolia Lam., Inga vera Willd. , Senna Multijuga (Rich.) H.S. Irwin & Barneby, Solanum granulosoleprosum Dunal, Heliocarpus popayanensis Kunth (Heliocarpus americanus L.), Acnistus arborescens (L.) Schltdl., Alchornea triplinervia (Spreng.) Muell. Arg. , Allophylus edulis (A.St.-Hill.) Radlk., Aloysia virgata (Ruiz & Pav.) Juss., Anadenanthera colubrina (Vell.) Bren., Astronium graveolens Jacq., Balfourodendron riedelianum (Engl.) Engl., Brysonima laxiflora, Cabralea canjerana (Vell.) Mart., Campomanesia gaviroba, Campomanesia xanthocarpa O. Berg, Cariniana estrellensis (Raddi) Kuntze., Casearia gossypiosperma Briq., Cedrela fissillis Vell. , Ceiba speciosa, Centrolobium tomentosum Guillemin ex Benth. , Colubrina glandulosa Perkins, Cordia superba Cham., Cordia trochotoma (Vell.) Arrab. ex Steud, Dalbergia nigr, Eugenia brasiliensis, Eugenia pyriformis Cambess., Eugenia uniflora L., Ficus obtusifolia, Gallesia integrifolia ( Spreng. ) Harms, Gochnatia polymorpha (Less.) Cabrera, Guapira opposita (Vell.) Reitz, Guarea kunthiana A. Juss., Handroanthus chrysotrichus (Mart. ex DC.) Mattos (Tabebuia crysotricha), Helietta apiculata Benth. , Hyeronima akchorneoides, Inga laurina (Sw.) Willd., Jacaranda micrantha, Lafoensia pacari A. St. -Hil., Lithraea molleoides (Vell.) Engl. , Luehea candicans Mart., Luehea divaricata Mart., Magnolia ovata, Miconia chamissois , Miconia rigidiuscula Cogn., Mimosa bimucronata, Mollinedia uleana, Myracridruon urundeuva Allemão, Myrocarpus frondosus Allemão, Myrsine coriacea (Sw.) R. Br. ex Roem. & Schult., Ocotea puberula (Rich.) Nees,Ocotea silvestris Vattimo , Parapiptadenia rigida (Benth.) Brenan, Peltophorum dubium (Spreng.) Taub., Piptadenia gonoacantha (Mart.) J.F. Mac- Br., Poecilanthe parviflora Benth. , Posoqueria acutifolia Mart. , Prunus myrtifolia (L.) Urb. , Psidium catteleianum Sabine, Psidium myrtoides O. Berg, Sapindus saponaria L. , Schinus terebinthifolius Raddi, Senna silvestris (Vell.) H.S. Irwin & Barneby, Solanum pseudoquina A. St.- Hil., Sorocea bonplandii (Baill.) W.C. Burguer; Lanj. & Wess. Boer, Strychnos brasiliensis (Spreng.) Mart. , Tabebuia insignis (Miq.) Sandwith, Tabebuia rosealba (Ridl.) Sandwith, Tachigali denudata (Vogel) Oliveira- Filho, Terminalia brasiliensis (Cambess, ex A.St.- Hil.) Eichler , Tetrorchidium rubrivenium, Trichillia pallens C.DC., Xylosma cilliatifolia (Clos) Eichler, Myrcia ilheosensis, Maytenus gonoclada, Eugenia Brevistyla D. Legrand, Erythroxylum argentinum O. C. Schulz, Raulinoreitzia crenulata, Erythroxylum ambiguu, Peyr. , Tibouchina granulosa Cogn. The sulfentrazone , oxyfluorfen and haloxyfop-methyl is applied in different doses (0D , 1 / 2D , 1D and 2 D, where D = commercial dose of each product ) on the seedlings of different tree species in order to assess whether the products differentially affect the plant survival and growth. The experiments will be conducted at the Center for Agricultural Sciences , UFSCar , Araras , SP . The herbicide selectivity assay will have a completely randomized design with four replications. After the application will be assessed phytotoxicity at 7, 14 , 21, 30 and 45 days after treatment ( DAT ) and the dry matter of the aerial part to 50 DAT . The data will be interpreted by analysis of variance (ANOVA ) - which means between treatments will be compared by Tukey test or t-test ( p = 0.05 ) and linear regression analysis.