Evaluation of Rodenticide Bromadiolone and Chlorophacinone in Controlling Rodent Infestation at Al-Wadi Al-Gadeed Governorate in Egypt.

Rodent species was surveyed during the four seasons of 2014 and 2015 years, in four locations (El-Kharga at sherka sabaa (the company seven) area, El-Dakhla at Elrashda and Gharb El-Mawhob villages and El-Farafra at bir sitta (the sixth well) area) at Al-Wadi Al-Gadeed governorate of Egypt which located in the southwestern part of the country, in Egypt's Western Desert, part of the Sahara Desert between the Nile, northern Sudan, and southeastern Libya Which represented about 44% of the area of Egypt. Cultivated area about 108067 feddan. Six rodent species, Rattus rattus, Rattus norvegicus, Acomys cahirinus, Meriones libycus, Gerbillus gerbillus and Gerbillus campestriswere founded. R. rattus and R. norvegicus were more abundant species in the four seasons (spring, summer, autumn and winter) than other species. Rodent damage assessment to some field crops as wheat, maize, broad beans and tomato in mature stage was carried out. The highest damage was in maize, broad beans and tomato in all studied area and the lowest damage was in wheat in all studies area during 2014 and 2015. On the other hand, the efficacy of bromadiolone and chlorophacinone anticoagulant rodenticides against rodent was tested under field conditions. The field results revealed that, Bromadiolone achieved 86.44% population reduction in maize crop followed by 79.0% for chlorophacinone compound. Also, the population reduction of rodent in broad bean was 87.6% by bromadiolone and 80.59% by chlorophacinone. In case of tomato, bromadiolone gave 87.68% population reduction followed by 81.87% for chlorophacinone compound.