|
|
|
| Authors: | C. Ntonifor, C. Martin, P. Demo |
| DOI: | 10.17660/ActaHortic.1994.380.101 |
Abstract:
Between February 1988 and August 1989, a batch of 25 TPS progenies were recieved from CIP, Lima, Peru and evaluated at Mfonta (1 300 m.a.s.l.) in North West Province of Cameroon.
Progenies were sown in nursery beds containing unsterilized soil.
Only Furadan was applied to control soil insects.
Seedlings were transplanted to another nursery bed 35–45 days after sowing.
The transplanting density was 100 seedlings/m2. Late blight was partially controlled with 4 applications of Mancos/Manesan in 1988. Yield, plant adaptability and vigor, adaptability to transplant stress, and uniformity were recorded.
Plants were harvested 90 days after transplanting.
TPS germination was over 88% for all progenies.
The two best yielding progenies in 1988 were CIP 983011 (3.3 kg/m2) and CIP 9B7004 (3.0 kg/m2). In the following year, highest yielding progenies were CIP 986004 (6.0 kg/m2), CIP 9878001 (4.3 kg/m2), as well as CIP 985001 and CIP 985004 (4.2 kg/m2). The main difference in yields between the two years ralate to improvement in the subtrate of the nursery beds.
Seedling-tubers planted in the field have been shown to yeild more than tubers from imported varieties, and the tubers are iniform.
|
  
|