3077
After eight generations of selection , larvae of the selected strain ( Imida - R ) showed a 5 . 4 - fold increased tolerance to imidacloprid while adult tolerance level remained low .
 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