Table 3.

Effect of the direct return of the cotton stalks and root stubble infected with V. dahliae to the diseased soil containing V. dahliae on the rate of increase or decrease in disease index of the cotton Verticillium wilt.

Treatments	Disease index of the D70	Rate of increase or decrease (%)
Sterilized cotton stalks	12.50 ± 7.22 b	−70.00
Sterilized root stubble	45.83 ± 10.42 ab	+9.98
Sterilized cotton plants	27.08 ± 9.08 ab	−35.01
Cotton Stalks infected with V. dahliae	20.83 ± 20.83 ab	−50.01
Root stubble infected with V. dahliae	50.00 ± 9.55 a	+20.00
Cotton plants infected with V. dahliae	29.17 ± 4.17 ab	−30.00
CK	41.67 ± 5.51 ab