CRDI-1 Cotton Variety

CRDI-1 is a cotton variety developed by the Cotton Research and Development Institute (now CODA), and was approved by the Philippine Seed Board as a commercial cotton variety.

The variety is an improved population of Deltapine 90 (DP 90) introduced in the country in 1992. It was constituted after several years of selection and re-selection for hairiness and productivity within the original variety. Subsequent testings were done in different locations throughout the country.

Yield and agronomic features

CRDI-1 grows as tall as 100-120 cm at maturity and flooses at 113 days after emergence. A single plant bears nine bolls, each boll weighs an average of 4.9 grams. Thus a hectare field yields as much as 2.2 MT seedcotton. The first pick is 39.5% of the total seedcotton harvest.

It has a plant height of 100-120 cm at maturity and flosses at 113 days after emergence. The first pick is 39.5% of the total seedcotton harvest.

Lint recovery and fiber properties

CRDI-1 has high lint recovery averaging 40.8 percent.

Its fiber properties are within the standards set by textile miller: fiber length of 28.4 mm, fiber fineness (micronaire index) of 4.31 ug/in and fiber strength of 19.4 g/tex.

Resistance to leafhoppers

CRDI-1 is more resistant to leafhoppers than the other commercial varieties owing to its denser and longer trichomes which hinder sucking pests from penetrating the lamina.

Resistance to damping-off disease

The variety is additionally resistant to damping-off disease caused by Sclerotium rolfsii. Damping-off is becoming a serious seedling disease of cotton.

Adaptability

CRDI-1 is specifically adapted in Mindanao where it gives at least 10% higher seedcotton yield than the current UPL-C2 commercial variety.