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Species/Cultivar Selection

Use of Blight-Tolerant Potato Varieties

One of the effects of climate variability is the changes in pest and disease infestation cycles in crop farms. In Buguias, Benguet, potatoes are easily infected by blight and infested by leaf miners which makes crop management difficult and expensive. Blight and leaf miners prefer warm temperatures and wet environments which highly favors the increase in temperature and irregular patterns brought about by climate change. In order to combat this, blight-tolerant varieties namely LBR PO3 (Igorota) and LBR PO4 (Solibao) were introduced, to maximize potato yields.

Climate Adaptation Effectiveness

Both varieties are resistant to late blight. LBR PO3 is moderately resistant to late blight and leaf miners while LBR PO4 is strongly resistant against blight. The varieties mature in 110 and 90-120 days, respectively.

Climate Hazards

  • Extreme Rainfall
  • Rain-Induced Flooding
  • Tropical Cyclone

Locations

  • Buguias, Benguet, CAR (Cordillera Administrative Region)

Adaptation Sectors

  • Agriculture

CCET Instuments

  • Action Delivery

Target Group based on Vulnerability

Basic Sectors:
  • Children
  • Farmers and Landless Rural Workers
  • Indigenous Peoples
  • Persons with Disabilities
  • Senior Citizens
  • Women
  • Youth and Students

Evaluations

Economic / Financial Effectiveness
Mid

The initial cost of implementation is PhP 187,300/hectare with a 1-year return on investment. Potato farmers in Buguias, Benguet secure an estimated annual profit of PhP 47,700/hectare and internal rate of return of 152%. Even if the potato yield is lower, this practice is still much more profitable than using traditional potato varieties.

Technical Feasibility
Mid

This practice is commonly applied in upland potato farms especially during wet seasons. In Buguias, varieties that are resistant to pests and diseases are used by potato farmers in high elevation areas. The Igorota or Late Blight Resistant (LBR PO3) is a locally-bred potato variety and is moderately resistant to late blight and leaf miner. The Solibao variety (LBR PO4) exhibits high levels of resistance to late blight showing negligible infection of 1% compared to other potato varieties. However, more research is suggested to identify other disease- and pest-resistant potato varieties, and training should be conducted for the implementation of the practice to ensure its success.

Social Acceptability
Low

An estimated 5% of potato farmers in Benguet currently adopt this practice but it is projected to increase to 55% in the upcoming years.

Environmental Impact
Low (+)

Using blight-resistant varieties reduces the pesticide needed to combat late blight. This maintains soil quality and lessens the probability of soil contamination.

Mitigation co-benefit

Less use of pesticides would also reduce greenhouse gas emissions.

Keywords

blight-tolerant potato, increased resistance to pest and disease, reduced chemical inputs, increased income, blight tolerance, potato

References