EVALUATION OF PARTIAL BAIT SPRAYING EFFICIENCY ON THE POPULATION OF Ceratitis capitats WIED. IN GUAVA AND CITRUS GROVES IN SOUTH GAZA STRIP

Field study was conducted to evaluate the efficiency of three cases in
applied Bait Application Technique (SAT) as area-wide control proqrarns against
Medfly Ceratitis capitata Wied. in KhanYunis And Rafah Governorates. The first case
was real partial bait spraying BAT as traditional treatments. the second was high
BAT frequency treatments programs (10-20 days around) in Valencia orange and
guava groves and the third was low BAT frequency treatments programs (more than
30 days round) also in above fruit trees during two successive seasons; 2002 & 2003.
Investigation was conducted on all agricultural areas treated traditional BAT
treatments: two guava groves for every high and low BAT (requency and two
Valencia orange groves also for every high and low SAT frequency treatments
program in both seasons. Jackson traps with the male attractant trimedlure were used
in all groves study for monitoring the population fluctuation under three cases used of
BAT. The capture males per trap Iday (CTO) for 36 dates of inspection In season was
considered as indicator for efficiency three cases used of BAT against C. capitata and
to estimate Medfly population in fields study. Results show exist statistically
differences mean number CTD of C.capitata in three cases BAT used (traditional.
high, low frequency) in all groves. guava and Valencia. While this differences not exist
between two seasons 2002 and 2003 for all groves (traditional treatments) In both
Governorates. However the data indicated that high frequency BAT (10-20 days
round) in g:lava and Valencia orange groves reduce significantly the population of
Medfly comparison with the low BAT frequency (more then 30 days round) in guava
and Valencia groves. In seasons 2002 & 2003, eTO of C. cap < /em>itala ranged between
2.54.2.47 respectively in all groves treated first case BAT treatment (traditional). The
grand mean of 36 inspection every season in guava groves treated high and low BAT
frequency the eTO of Medfly was ranged 3.37-4.32 , 7.12-7.5 respectively. In
Valencia orange groves the grand mean of 36 inspection every season treated high
and low BAT frequency the CTO of C. capitata was ranged 3.60-3.56 . 3.82-7.12
respectively. Relationship between fruil availability of host fruit, climatic condition and
Medfly numbers have been observed in this study. Percentages fruit infestation in
guava ranged between 25 % 10 48% while the percentage infestation in Valencia
orange ranged between 0.0% to 56.9% in KhanYunis and Rafah during harvesting
periods in 2002 & 2003 seasons.