برهمکنش مخلوط حشره کش های هگزافلومورون و فلوبن دیامید روی لارو بید کلم Plutella xylostella

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه گیاه پزشکی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران، ایران

2 موسسه تحقیقات گیاه پزشکی ایران، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران.

چکیده

بید کلم نسبت به حشره­ کش­ ها مقاومت ذاتی بالایی دارد. یکی از راه­کار­های کاهش سرعت رشد مقاومت به آفت ­کش­ ها، استفاده از مخلوط حشره ­کش ­ها با نحوه تاثیر متفاوت است. در این تحقیق حشره­ کش­ های هگزافلومورون و فلوبن­دیامید به تنهایی و مخلوط با هم، روی لارو سن سوم بید کلم مورد آزمایش قرار گرفتند. در اختلاط نیز سه غلظت از هر حشره­ کش استفاده شد. مقدار LC50 برای لارو سن سوم، 48/1 و 27/10 میلی ­گرم بر لیتر به­ ترتیب برای فلوبن­دیامید و هگزافلومورون محاسبه شد. زیست­ سنجی ترکیب دو حشره­کش فوق روی لارو سن سوم نشان داد که اختلاط در غلظت ­های پایین دو حشره­ کش اثر تشدیدکنندگی دارد، اما اختلاط در غلظت­ های بالای هر دوی آن­ها دارای اثر برهمکنش از نوع تجمعی است. اضافه کردن غلظت­ های پایین حشره ­کش فلوبن­دیامید به هگزافلومورون می‌­تواند ضمن افزایش مرگ و میر لاروها، فاصله زمانی بین تیمار- مرگ و میر را کاهش داده و در نهایت درصد خسارت لاروها را بعد از سمپاشی کاهش دهد. بنابراین استفاده از مخلوط حشره ­کش ­ها در مدیریت بید کلم با توصیه کارشناس و در یک محدوده غلظت از آن­ها امکان ­پذیر است.

کلیدواژه‌ها


عنوان مقاله [English]

Interaction of hexaflumuron and flubendiamide mixture against the larvae of diamondback moth Plutella xylostella

نویسندگان [English]

  • F. Afsari 1
  • A. Sheikhigarjan 2
  • S. Imani 1
  • Y. Ostadi 1
1 Department of Plant Protection, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.
چکیده [English]

Diamondback moth has a high potential for insecticide resistance. Usage of insecticides with different modes of action as a mixture is one of the strategies of insecticide resistance management. It can reduce the resistance development rate. In this study, hexaflumuron and flubendiamide were tested as alone and their mixture against the third instar larva of diamondback moth. Three concentrations of each insecticide were used in the mixture. The LC50’s values of hexaflumuron and flubendiamide were calculated as 1.48 and 10.27 mg L-1 against the third larvae, respectively. Bioassay of both insecticide mixtures showed that the mixture at the low concentrations had a synergistic effect, whereas it was cumulative effect at the highest concentration mixture. Binary combination of flubendiamide at the lower concentration with hexaflumuron can increase larval mortality. It reduces latent effectiveness of hexaflumuron and causes to decrease crop loss after treatment. Therefore, the use of mixed insecticides in IPM of diamondback moth is possible only with expert advice in the limited concentrations of them.

کلیدواژه‌ها [English]

  • Bioassay
  • cumulative
  • mixture
  • synergism
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