rtokens: Proponents of the plan discount the worries of the U.S. growers and say the plan has enough safeguards built into it to eliminate any significant threat to American producers .
pos: JJ NNS VBP IN EX VBZ DT JJ NN IN DT NN , CC IN PRP VBZ JJ IN JJ NN NNS IN DT NNP NNP NNP .
tokens: Mexican officials contend that there is no scientific basis for the ban , and that it is illegal under international trading rules of the World Trade Organisation .
ltokens: California growers have charged that removing the restrictions , even on a limited basis , would endanger the $ 1 billion U.S. industry if potentially harmful Mexican insects were brought into the country along with the avocados .