Patato late blight R & D program in the Philippines: a country report
Zenaidia N. Ganga (Benguet State University, Benguet, Philippines)
The Philippine highlands, particularly the provinces of Benguet and Mt. Provinces are the major producers of potato in the country. Late blight caused by Phytophthora infestans is the major constraint to potato production. Although farmers control late blight by spraying fungicides, the use of resistant varieties in combination with other control measures such as proper cultural management is still the best approach. The disease resistant breeding program started from 1980s. Many of the evaluated germplasms came from the International Potato Center (CIP). The work was conducted with the following objectives: a). Combine late blight resistance with golden nematode (Globodera rostochiensis) resistance, b). Improve the local adaptation of late blight resistant clones and c). Incorporate processing traits into selected late blight resistant varieties. The following summarizes the highlights of the different studies conducted: 1). Four late blight resistant varieties were selected and officially recommended to farmers, 2). Two of the varieties Igorota and Solibao have acceptable processing traits and are now commercially planted by the highland farmers, 3). Selected introduced processing varieties with good adaptation and yield are Disco,Columbus, Hermes, Agria, Snowden and Atlantic, 4). Results of the metalaxyl test showed that most of the isolates were metalaxyl resistant or intermediate, 5). Studies on the combination of resistant variety and fungicidal spraying showed that chemical spraying can be reduced as much as 50% using our recommended varieties Igorota and Solibao.
【CateGory Index】： S435.32