Method of Propagation

 

Seed Propagation In coffee, generally the propagation is done through seeds and of late in robusta, the clonal propagation was also established to be successful. To a limited extent, grafted plants are also being planted.

From the selected and certified seed blocks, healthy and fully matured fruits of normal appearance with three quarters of ripening are harvested selectively from the marked plants during November-December in the case of arabicas and in January-February in robustas.

Discarding the floats, the sound fruits are pulped and sieved to remove the defective beans. The beans are then mixed with wood ash @ 0.75 kg per kg of seeds and dried under shade stirring from time to time to facilitate uniform drying. To protect the seeds against any microbial infection, the seeds are treated with either carbendazim @ 1 g or with vitavax @ 0.66 g per kg of seed coffee.

Clonal propagation
 
In the case of robusta, which is highly cross pollinated clonal propagation is more adaptable. In the case of arabica, the stabilization of desirable characters in the selected plants could be easily maintained by adopting clonal or vegetative propagation method. The vertical (orthotropic) shoots are marked after harvest is over in any selected plant.

Single node green wood (semi-hardwood) cutting of 10 cm length and 3 to 6 months old are planted in polythene bags with the medium of jungle soil, sand and cattle manure in the proportion of 6:3:1. The bags with cuttings are arranged in a propagation chamber made of a trench of size 2 x 1 x 0.5 m covered over with a thick polythene sheet (500 gauge) spread over a framework of bamboos.

References Kerala Agricultural University. 2011. Package of Practices Recommendations: Crops. 14th edition. Kerala Agricultural University, Thrissur- 360 p.