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اکبر علی وردی محمد شریفی

چکیده

در آزمایش گلدانی، وجود اثر متقابل بین نوع نازل و ساعت کاربرد در روز بر کارایی پاراکوات در مهار گاوپنبه بررسی شد. تیمارها شامل پنج مقدار پاراکوات (0، 75، 150، 300 و 600 گرم ماده موثره در هکتار) بود که با سه نوع نازل (ضد بادبردگی یک بادبزنه، ضد بادبردگی دو بادبزنه 2020 و ضد بادبردگی دو بادبزنه 7030) در دو شماره نازل (110015 و 11002) در چهار ساعت در ­روز (20:00، 22:00، 05:00 و 07:00) در چهار تکرار بر روی اندام­های هوایی گاوپنبه پاشیده شده بود. در هر چهار زمان کاربرد، افزایش شماره نازل در نازل ضد بادبردگی یک بادبزنه سبب افزایش مقدار پاراکوات لازم برای گیاه­سوزی 90 درصدی گاوپنبه شد. ولی بجز در برخی زمان­ها (22:00 و 07:00 در مورد نازل ضد بادبرگی دو بادبزنه 2020 و 05:00 در مورد ضد بادبردگی دو بادبزنه 7030)، افزایش شماره نازل در نازل­های دو بادبزنه سبب کاهش مقدار پاراکوات لازم برای گیاه­سوزی 90 درصدی گاوپنبه شد. به طور کلی، در هر شماره­ای از هر نوع نازلی، کارایی پاراکوات تحت تاثیر زمان­های مختلف روشنایی روز (20:00 و 07:00) قرار نگرفت. برعکس، کارایی پاراکوات تحت تاثیر زمان­های مختلف تاریکی روز (22:00 و 05:00) قرار گرفت به طوری که کارایی پاراکوات در زمان کاربرد در 22:00 از زمان کاربرد در 05:00 کمتر بود. به عنوان بهترین تیمار، کاربرد پاراکوات با نازل ضد بادبرگی دو بادبزنه 7030 با شماره 11002 در ساعت 22:00 که به کمترین میزان پاراکوات (04/342 گرم ماده موثره در هکتار) برای گیاه­سوزی 90 درصدی گاوپنبه نیاز داشت به کشاورزان توصیه می­شود.

جزئیات مقاله

کلمات کلیدی

علف¬کش, حرکت برگی, نازل یک بادبزنه, نازل دو بادبزنه

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ارجاع به مقاله
علی وردیا., & شریفیم. (2020). اثر متقابل بین نوع نازل و ساعت کاربرد در روز بر کارایی پاراکوات در مهار گاوپنبه (Abutilon theophrasti Medicus.). مطالعات حفاظت گیاهان, 34(1), 113-123. https://doi.org/10.22067/jpp.v34i1.84218
نوع مقاله
علمی - پژوهشی