Distribution of methylisothiocyanate and chloropicrin in boles or roots of Douglas-fir trees

Autor:	Paul G. Forsyth, Jeffery J. Morrell, Walt G. Thies
Rok vydání:	1994
Předmět:	Phellinus weirii Global and Planetary Change Chemical concentration Ecology biology Chloropicrin Forestry biology.organism_classification chemistry.chemical_compound Horticulture chemistry Botany Chemical control Douglas fir Mathematics
Zdroj:	Canadian Journal of Forest Research. 24:2324-2329
ISSN:	1208-6037 0045-5067
Popis:	The distribution of the fumigants methylisothiocyanate (MITC), Vorlex, and chloropicrin, used to control Phellinusweirii (Murr.) Gilb., was assessed 10 years after application to sites near the bases of living Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco). MITC was detected up to 8 m above the original application site, and fumigants were present at the highest levels near the pith of the tree. MITC was detectable as far as 2.1 m down the roots in trees treated with the largest dosage, and Vorlex was detectable 1.5 m from the application site. Levels of chloropicrin were generally greater than levels of MITC or Vorlex, but chloropicrin was detected only up to 3 m above the application site; lower water solubility probably accounted for the restricted diffusion of this chemical. The results indicate that fumigants can diffuse for considerable distances through Douglas-fir boles and roots. Further studies are underway to establish the efficacy of the concentrations measured in these trees.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::53b34d1cc9df62f97bc75b9f37f22e8c https://doi.org/10.1139/x94-300 Zobrazit plný text záznamu