PFA in walnut at the Central Valley of Chile

C. González R., G. Lemus S., V. Jelves A., N. Puelles A., H. Guerra A., B. Cuevas I., I. Romero P., G. Guerrero, M. Henríquez M., R. Corrales E.
Female flower abortion caused by lack and excess of pollen was studied during 3 seasons (2014 to 2016), at San Bernardo, and at Paine orchards, close to Santiago, Chile. Cultivars studied were ‘Serr’, ‘Chandler’, ‘Howard’, and ‘Franquette’. The first season ‘Serr’ showed 37.2% abortion, where 27.8% was due to excess of pollen. ‘Serr’ was the most affected cultivar for this cause, compared with the other cultivars under evaluation. In the season 2015-16 ‘Serr’ presented 56.3% abortion and excess of pollen was 36.7%. In the 2016-17 season, ‘Serr’ showed 38.3% abortion. Excess of pollen induced 32% of that abortion, compared with ‘Franquette’, which had only 5% abortion; 4% caused by excess of pollen. The differences between cultivars are probably genetic. However, differences between seasons are due to chilling accumulation each winter time.
González R., C., Lemus S., G., Jelves A., V., Puelles A., N., Guerra A., H., Cuevas I., B., Romero P., I., Guerrero, G., Henríquez M., M. and Corrales E., R. (2021). PFA in walnut at the Central Valley of Chile. Acta Hortic. 1318, 87-90
DOI: 10.17660/ActaHortic.2021.1318.14
pollination, abscission, cultivars

Acta Horticulturae