ارزیابی علف‎کش‎ها در کنترل علف‎های‎هرز یونجه (Medicago sativa) تازه کاشت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مرکز تحقیقات جیرفت

2 موسسه تحقیقات گیاهپزشکی

چکیده

به منظور کنترل علف های هرز مزارع یونجه تازه کاشت در منطقه جیرفت، آزمایشی به مدت دو سال در قالب طرح بلوک‌های کامل تصادفی با 3 تکرار و 8 تیمار اجرا گردید.  تیمارهای آزمایش شامل ایمازاتاپیر (10 درصد SL) به میزان 5/0، 75/0 و 1 لیتر در هکتار از ماده تجارتی + سیتوگیت به میزان 1 لیتر در هکتار در مرحله 15-10 سانتی متری یونجه پس از سبز شدن علف های  هرز + سیکلوکسیدیم (10 درصد EC) به میزان 2 لیتر در هکتار در زمان 6-3 برگی باریک برگ ها، پندی متالین (33 درصد EC) از ماده تجارتی به میزان 2 و 3 لیتر در هکتار قبل از سبز شدن یونجه و علف های هرز، کلرتال دی متیل (75 درصد WP) از ماده تجارتی به میزان 6 و 8 کیلو در هکتار بعد از کاشت و قبل از سبز شدن یونجه + سیکلوکسیدیم به میزان 2 لیتر در هکتار در زمان 6-3 برگی باریک برگ ها، شاهد وجین در طول فصل رشد بود. نتایج نشان داد که کلرتال دی متیل و پندی متالین پنیرک را بهتر از ایمازاتاپیر کنترل می نماید. در مقابل ایمازاتاپیر کلم اروپایی (Gouan Brassica tourenforti) را بهتر از کلرتال دی متیل و پندی متالین کنترل نمود. با این وجود، کارایی علف کش ها در کنترل سلمه تره (Chenopodium album L.) و تاج خروس بدل ((L.)Mart. Digera muricata) نسبتاً مشابه بود. ایمازاتاپیر 5/0 و 75/0 لیتر در هکتار بهترین علفکش در آزمایش بود و بیشترین وزن خشک یونجه در چین اول و دوم داشت. کلرتال دی متیل باعث افزایش وزن خشک یونجه در چین دوم شد، اما پندیمتالین با ایجاد گیاه سوزی باعث کاهش وزن خشک یونجه گردید و قابل توصیه نیست.

کلیدواژه‌ها

عنوان مقاله [English]

Evaluation of Some Herbicides to Weed Control in Seedling Alfalfa

نویسندگان [English]

  • Ebrahim mamnooie 1
  • Parviz shimi 2
چکیده [English]

of Jiroft in a randomized complete blocks design with 3 replications and 8 treatments for two years. Treatments included Imazethapyr %10 SL at 0.5, 0/75 and 1 Lit/ha + Cytogate at 1Lit/ha in 10-15 cm alfalfa, post emergence of weeds + Cycloxydim %10 EC at 2 Lit/ha post emergence of grass weeds, Pendimethalin %33 EC at 2 and 3 Lit/ha (pre- emergence), Chlorthal-dimethyl %75 WP at 6 and 8 kg/ha + Cycloxydim at 2 Lit/ha, weed free check. The results showed that Chlorthal-dimethyl and Pendimethalin controlled Malva parviflora better than Imazethapyr, and Imazethapyr controlled Brassica tourenforti better than Chlorthal-dimethyl and Pendimethalin. All herbicides showed similar efficiency on Chenopodium and Digera muricata control. Imazethapyr was the best herbicide of the experiment and at 0.5 and 0.75 Lit/ha produced the highest alfalfa biomass in the first and second harvests. Chlorthal-dimethyl increased alfalfa biomass at second harvest, but Pendimethalin caused phytotoxocity on alfalfa and reduced its biomass.

کلیدواژه‌ها [English]

  • chemical control
  • imazethapyr
  • chlorthal-dimethyl
  • pendimethalin

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