Detailed introduction to the new cotton variety Chuanmian 65

Chuanmian 65 was bred by the Cash Crop Research Institute of the Sichuan Academy of Agricultural Sciences, (641400 Jianyang). In June 2002 it passed the approval of the Sichuan Provincial Crop Variety Approval Committee and was officially named "Chuanmian 65".

In the 1998-1999 Sichuan provincial regional trials, this variety had a Verticillium wilt index of 18.4-18.5, averaging 18.5, 63.2% lower than the control Simian 2, showing resistance to Verticillium wilt. Its Fusarium wilt index was 4.9-8.6, averaging 6.8, 86.4% lower than the control Simian 2, showing high resistance to Fusarium wilt. In continuous evaluations by Huazhong Agricultural University from 1999 to 2001, the spider mite damage rating was 1.29-1.39, averaging 1.33, 42.2% lower than the control Emian 18, showing resistance to cotton spider mites. The seed damage rate from pink bollworm was 6.3-9.0%, averaging 8.1%, 50.6% lower than the control Emian 18, showing resistance to pink bollworm.

Samples submitted from the 1998-1999 Sichuan provincial regional trials and tested by the Cotton Quality Supervision and Testing Center of the Ministry of Agriculture showed that all fiber indices were significantly better than those of the control Chuanmian 56, meeting the national quality cotton fiber standards.

This variety is a medium-early maturing upland cotton, with a growth period of about 135 days; the plant is medium in height, tower-shaped, relatively compact in plant type, with steady growth; the leaves are medium-sized and slightly lighter in color; it has strong boll-setting ability, with flowering and boll-setting concentrated, large bolls that are oval and slightly pointed, easy boll opening, few rotten bolls, and pure white lint; single boll weight is 5.4 grams, lint percentage 43.0%, lint index 6.6 grams, and seed index 8.7 grams.