Document Type: Original Article


1 Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Mohaghegh Ardabili; Ardabil, Iran

2 Weed Science Researcher. Member of Young Researchers and Elite club, Islamic Azad University, Iran

3 Department of Plant Protection, College of Agriculture, Bu-Ali Sina University, Hamedan, Iran

4 University College of Omran and Tosseeh, Hamedan, Iran.

5 Professor, Department of Weed Research, Plant Pest and Disease Research Institute, Tehran, Iran



The current study evaluated the ill-effects of different doses of an herbicide i.e. Imazethapyr on the population density of some natural enemies such as ladybug, earwig and Carabid beetles. The experiment was carried out on weed-infested established alfalfa farms for the two consecutive growing seasons i.e. spring and summer during 2014–2015. The experiment was laid out in a randomized complete block design (RCBD) with eight treatments and four replications. The results showed that heavy doses application of Imazethapyrhas badly affected lady beetle, earwig and carabid beetle population, until one week after spraying. Severe losses were observed as Incrementally with high doses of Imazethapyr; therefore, it is important not to exceed the recommended, standard dose (0.5 L/ha).


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