19456
Mayfly and caddisfly species were most sensitive to short - term imidacloprid exposures ( 10 tests ) , whereas the mayflies showed by far the most sensitive response to long - term exposure of all seven arthropod species tested ( 28 - d EC10 values of approximately 0 . 03 micro g / L ) .
 Chemical: imidacloprid
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: imidacloprid