Test of sweet corn varieties were 30 toward destruction of bacteria Erwinia chrysanthemi pathovar zeae causes โรคลำต้น rot of sweet corn. All the tests 6 series of experiments, including infections 4 isolates 151XH104-5-57 98-12-2-51 ATS5_03-2,,,, ATS5_10 water steamed, sterilized and Ecc. (negative control) were 10 early on a series of experiments. By inoculation with the use of a toothpick, sterilized and kick colonies of bacteria cultured on NA age 12 hours dip. Into the corn stalk deep around 0.5 cm above the ground level 2-3 cm and plugs with Vaseline, and covered with plastic to control the relative humidity. Then evaluate the index of disease, and that 2 4 6 days after inoculation with the disease each level to calculate the percentage of index of disease. And break the disease resistance is 6 characteristics, it was found that the bacteria isolate 1 corn resistance to many (highly resistant < = 17%) 6 varieties. And is very weak (highly susceptible = 85-100%) 2 varieties, bacteria Isolate 2 corn resistance to many 2 varieties and light แอมา much 7 varieties,. Bacterial isolate 3 corn resistance to many 0 breed and very weak 8 varieties, bacterial isolate 4 มีข้าวโพด very 2 resistance varieties. And is very weak 7 varieties, water and sterilized Ecc make corn showed symptoms of disease.
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