عنوان مقاله
تاثیر سورفکتانت ها بر علف کش های به کار رفته در دو گونه کوخیا (Kochia scoparia) و بوته خار روسی (Salsola iberica)
فهرست مطالب
چکیده
مقدمه
مواد و روش ها
نتایج و بحث
بخشی از مقاله
تاثیر علف کش
در مورد کوخیا و بوته خار روسی در گلخانه از علف کش استفاده گردید. برآورد بصری کاهش زیست توده 14 روز بعد از کار با مقایسه گیاهان تیمار شده با گیاهان تیمار نشده تعیین گردید. کوخیا و بوته خار روسی تقریباً 1 سانتی متر بالای سطح خاک برش خورده و وزن تازه آنها تعیین گردید. کاهش زیست توده به صورت درصد کاهش وزن تازه گیاهان تیمار شده در مقایسه با گیاهان تیمار نشده محاسبه گردید.
کلمات کلیدی:
Surfactants affect herbicides on kochia (Kochia scoparia) and Russian thistle (Salsola iberica) James D. Harbour Department of Plant Sciences, North Dakota State University, Fargo, ND 58105-5051. Present address: DuPont Crop Protection, Fargo, ND 58104 Calvin G. Messersmith Department of Plant Sciences, North Dakota State University, Fargo, ND 58105-5051 Bradford K. Ramsdale Corresponding author. Department of Plant Sciences, North Dakota State University, Fargo, ND 58105-5051; brad.ramsdale@ndsu.nodak.edu The effects of surfactants on retention, absorption, and efficacy were determined for bromoxynil, 2,4-D amine, and glyphosate on kochia and Russian thistle. Bromoxynil, 2,4-D amine, and glyphosate retention were similar for both species. Surfactants improved spray retention on kochia and Russian thistle compared with spray mixtures without surfactant. Herbicides mixed with allinol 810-60 surfactant were generally retained better than with MON 0818, oxysorbic 20, or R-11 surfactant. Bromoxynil phytotoxicity was not affected by surfactants, and all surfactants equally enhanced 2,4-D amine phytotoxicity. Glyphosate phytotoxicity to kochia was enhanced only by MON 0818 and oxysorbic 20, and phytotoxicity to Russian thistle was enhanced only by MON 0818. Bromoxynil, with or without surfactants, was absorbed similarly by kochia and Russian thistle. 2,4-D amine and glyphosate absorption were greater with surfactants than without. Kochia and Russian thistle leaves had visibly similar crystalline epicuticular wax structure when plants were grown at # 40% or $ 80% relative humidity, which did influence absorption of these herbicides. Nomenclature: Bromoxynil; 2,4-D amine; glyphosate; kochia, Kochia scoparia (L.) Schrad. KCHSC; Russian thistle, Salsola iberica L. SASKA. Key words: Adjuvant, 14C-herbicides, linear alcohol ethoxylate surfactant, relative humidity.
