Inhibition of Amphiphilic N-Alkyl-O-carboxymethyl Chitosan Derivatives on Alternaria macrospora

Table 2

Effective concentration for 50% inhibition (EC50) to Alternariamacrospora of test chemicals and their characteristics.

Compound (starting material)	Side chain length	EC50 mg/ml
CCS (CCS 1)	0	0.392
ACCS 1 (CCS 1)	C4	0.422
ACCS 2 (CCS 1)	C8	0.243
ACCS 3 (CCS 1)	C10	0.212
ACCS 4 (CCS 1)	C12	0.169
ACCS 5 (CCS 2)	C8	0.236
ACCS 6 (CCS 3)	C8	0.196
Chlorothalonil (−)	-	0.159

Mean values followed by different letters are significantly different (). CCS: carboxymethyl chitosan; ACCS: alkyl carboxymethyl chitosan.