ABACA Activities in the Philippines - Unido

Ref. No. CFC/FIGHF/09 CFC/UNIDO/FIDA 49
1 Results of several agronomic trials using the specified varieties.
2 Data taken 27 MAP
Table 15. Mosaic infection versus yield loss (Davao)
Variety Potential yield
(kg/Ha/yr) 1
Computed
yield
(kg/Ha/yr)
Musa tex 51
Inosa
Laguis
2,084
1,320
1,075
No fiber yield
since all the
varieties
succumbed to
Mosaic
incidence
(%) 2 Yield loss (%)
86.36
77.01
77.15
100% yield loss
since no
harvestable stalk
remained. Disease
Linawaan
Tangongon
Maguindanao
1,270
1,500
2,100
the disease. 78.40
65.48
84.42
incidence was high
even at an early
stage of growth
(14MAP)
1 Results of several agronomic trials using the specified varieties.
2 Data taken 14 MAP
5. Conclusion and Recommendations
There was no extensive field screening of indigenous abaca varieties/strain that had been conducted
to determine their resistance to the viral diseases. The activities undertaken in this project resulted to
assessment of field reactions of varieties to the bunchy-top and mosaic infection which were the basis for
their selection to be adopted/recommended to the farmers. The abaca varieties which possessed relative
degree of resistance were identified either to be planted in specific location or be adapted in other abacagrowing
areas. For instance, the Abuab variety which is a Bicol variety can be planted in the Visayas since it
possesses degree of resistance to mosaic both in Bicol and Leyte. It is also true for other varieties such as
Laguis, Linawaan, Inosa and Maguindanao. The regresssion and correlation analysis which supported the
symptomatology method of disease assessment had validated the reactions of the varieties to the two viral
diseases of great importance. Although, yield loss estimates can also be useful in measuring the degree of
resistance, this was not considered in the selection index, but utilized in correlating the disease incidence as a
predictor of yield loss. It was also a known fact that agro-climatic conditions are contributory factors to yield
loss. The following varieties with resistance to mosaic which can be recommended for commercial planting
are as follows:
Region V- Abuab, Linawaan, Musa Tex 51
Region VIII – Laguis, Abuab and Inosa
Region XI - Tangongon, Inosa and Laguis
While those varieties with resistance to bunchy-top which can be recommended for commercial planting are:
Region V - Maguindanao, Inosa, Musa Tex 51
Region XI – Maguindanao, Laguis and Linawaan