Effect Of Emamectin Benzoate On Root-knot Nematodes And Tomato Yield

China is one of the most important producting countries of protected vegetable in the world. Meantime, protected vegetable is the most dynamic industry in agriculture of China,playing a key role in the development of modern agriculture. However, many greenhouse crops suffer from attack by nematodes, soil-borne pathogens as well as to competition from weeds. At present, the standard treatment for the management of nematodes, soil-borne pathogens and weeds is preplant soil fumigation with methyl bromide(MB). However,developing countries are committed to totally phasing out MB production and use by 2015 due to its detrimental effects on stratospheric ozone. The absence of MB from market will impact agricultural, silvicultural, and horticultural production unless safe and efficacious alternatives are found. Emamectin benzoate is one of the promising chemicals to control nematodes. Therefore, in this study, a series of laboratory test, greenhouse pot experiment and field trials were conducted to determine the bioactivities of emamectin benzoate for its potential to control nematode. The results of this study will offer a theoretical foundation to the use of emamectin benzoate on greenhouse vegetable industry. The results were as follows:1. Laboratory toxicity results showed that the LC50 and LC90 of emamectin benzoate to second-stage juveniles(J2) of Meloidogyne incognita were 3.59 and 18.20 mg/L, respectively.2. Field trials in tomato were conducted determine the efficacy of emamectin benzoate for its potential to control nematode. The results revealed that emamectin benzoate exhibited excellent control effects to M. incognita while with certain yield increase.