Performance of Spodoptera litura Reared on Maize Sprayed with Methyl Jasmonic Acid and Relationship with Defensive Proteins of Maize

th instar were both reduced for those fed on MeJA-treated maize. In addition, the activity of trypsin inhibitor (TI) on MeJA-treated maize was significant higher than on the control and this result suggested a negative correlation may occur between TI activity and growth performances of S. litura. Base on results, maize sprayed with MeJA might not kill the S. litura directly, but could decrease the growth efficiency of larvae.