Screening of Guava genotypes to natural infestation of fruit flies (Diptera:Tephritidae) in River Nile, Sennar and North Kordofan States, Sudan

Screening of Guava genotypes to natural infestation of fruit flies (Diptera:Tephritidae) in River Nile, Sennar and North Kordofan States, Sudan



Abdelaziz E. Gesmallah, Mohammed H. Mekki, Igbal A. Abdelatief, Ali E. El Jack, Ali O. Ali



The infesting species and their infestation indices of
fruit flies were determined for guava genotypes (Psidium guajava
L.),grown in River Nile, Sennar and North Kordofan States during
the period from June to August 2010 .Twenty genotypes were selected from
each state to be evaluated ,where ten mature fruits from each
genotypes were harvested randomly from insecticide unsprayed trees.
Fruits were brought to the laboratory and placed in individual plastic
vials containing sand at the bottom to obtain the pupae. Infestation
indices were estimated by means of total number of pupae/fruit. Pupal
viability was then calculated based on the percentage of pupae
resulted in fly emergence. Data was analyzed using analysis of variance
and Duncan multiple range test for mean separations. Results showed that
Guava fruits were infested by four fruit fly species Ceratitis cosyra,
C.quinaira, C capitata and Bactrocera dorsalis constitute (82.2),
(0.8), (16.7), (0.3% ) and 28.35 ,0.01 ,10.1 and 61.56% in River Nile
and Sennar States respectively. While in North Kordofan State guava
fruits were infested by C.cosyra, C.capitat and B.dorsalis 98.4,0.4 and
1.2% respectively. All the evaluated genotypes in River Nile and Sennar
States were infested by the fruit fly with varying degrees only two
genotypes 15 red flesh fruit and 19 white flesh fruit in Kordofan state
were found free from fruit fly infestation. Infestation was much higher
in Sennar and River Nile states (32 and 29 pupae/fruit) respectively
compared to North Kordofan (1.6 pupae/fruit).The higher infestation rate
occurred in ripe guava fruits (33) compared to 18 and 6 pupae/fruit in
mature green and immature green fruit respectively. 



10.22161/ijeab/2.3.16



http://ijeab.com/upload_document/issue_files/16%20IJEAB-APR-2017-45-Screening%20of%20Guava%20genotypes%20to%20natural.pdf



http://ijeab.com/submit-paper/

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