Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Post-harvest rot diseases of fruits of the African pear (Dacryodes edulis) in south eastern Nigeria.

Abstract

Botryodiplodia theobromae and Rhizopus stolonifer account for 80% of the crop loss of African pear (Dacryodes edulis) and Aspergillus niger and Erwinia spp. account for the remainder. All 4 pathogens grew in culture at 10°C but no growth was recorded at 5 and 40°. No rot developed on inoculated fruits at 5, 10 and 15° but there was progressive decay at 20-30°. Low RH (0-43%) and high RH (80-100%) supported rot development. Pears infected by B. theobromae had a 61% loss in starch and a 2% loss in total nitrogen content. Lipid content increased by 19.6%. A. niger infection caused a 71% starch loss, a 4.6% loss of total lipids and an 89.6% increase in total nitrogen. R. stolonifer caused a starch loss of 81%, a 7.3% loss of total nitrogen and an increase in total lipids of 0.9%.