|Published online: November 22, 2014||$US5.00|
The Guava (Psidium guajava L.) fruit is a lovable dessert in Sudan. It is known, however, to be infested by a number of fruit fly species, three belonging to the genus Ceratitis (viz. capitata, quinaria and cosyra), and the invader fly (Bactrocera invadens Drew Trusta and White), in addition to a newly reported coleopteran (Carpophilus hemipterus L.). A number of combinations (regimes) of relatively high temperature/time were tested to disinfest fruit flies from guava in Khartoum State, Sudan in 2010. These treatments include 35°C, 40°C, 45°C, 50°C, and 55°C for one hour (hr), 55°C for ½ hr, and 55°C for ¼ hr. The results of these treatments reflect that the 55°C is the only temperature capable of disinfesting the guava fruits at all the three different time periods tested (1, ½, & ¼ hr). However, the least significant difference (LSD) was significant (at 0.05 level) for all the treatments used (except 35°C/1 hr regime) as compared to the control. Accordingly, the 55°C for ¼ hr regime can be recommended to produce quality guava fruits free of insect infestation. That is, the total soluble solids (TSS) tests reflected figures higher than the control.
|Keywords:||Guava, Fruit Flies, Hot Water Treatment, Sudan, TSS, Quality|
Associate Research Professor, Grain Technology Department, Food Research Center, Ministry of Science and Communication, Khartoum, Khartoum, Sudan
Research Professor (Entomologist), Institute of Environment and Natural Resources, Crop Protection Section, National Center for Research, Khartoum, Khartoum, Sudan