الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Moloukhia, cowpeaand tomato plants were treated with
prothiofos and sulprofos at tre rates of 1000 and 720 grams
active ingredient per feddan r~pectively uSing the
emulsifiable concentrate fonwulations 43, 87 and 77 days
after planting at Kaba, Kalyobia Gevernorate during 1979
Chemical analYses for the resisdues were conducted
utilyzing gas chromatographic and thin layer techniques.
The results indicated the ~ollowing:
I-Higher deposits were detected where prothiofos was Used
indicating tr~ Correlation between the concentration of
the pesticidal chemical and too amounts of residues
detected.
2- The highest l’,’vel of residues were found on and in
molcukhia le’,ves While tre lowest were those on <ind in
tomato fruits. This finding demonstrat!,d the relationship
between the treated surface and the amounts of residues
deposited.
3- The initial depOSits were 50.58 and 42.54 ppmon and in
moloukhia leaves, 17.66 and 5.01 ppmon and in cowpea.
green pods and 1.29 and 0.79 ppm on and in tonnto fruits
where prothiofos and sulprofos were applied respeotively.
4- StudYing the rate of persistence of the two pesticides on
the three oommodities, indicated that Prothiofos residues
were more persistent too t those of sulprof’os. Deposits
were reduced to 49.21 and 1.2 % on and in mOloukhia leaves,
to 8. 73 and 1.00 % on and in cowpea pods and to 16.28 and
10.1) % on and .in tomato fruits six days after treatment
with prothiofos and sulprofos respectively.
57 Silica gel thin layer chromatographic tecnique showed
the presenoe of the parent compound of prothiofos only in
all the samples taken from the treated plots. Applying au
sulprofos, besides the parent OOmpound, two’,other degredation
compounds having the Rf values of 0.16 and 0.23: at
defferent periods in the three treated commodities.
6~ Since there is no established tolerance for the two pesticidal
chemicals up till now and accodring to the data
obtained, it is SUggested that:
a. Prothiof’o8 should not be recommended for Use on m
mOloukhia plants. Treating cowpea and tomato plants,
the crops xcould be-iarvested 12 and 15 days after tr
treatment respectively.
b. MOloukhia plants, cowpea green pods and tomato fruits
could be marketed for human consumption 12, 9 and 9
days after treating the plants with sulprofo8
respectively.
c. Produced matuxe cowpea seeds contained undetectable
amounts of either prothiofos or sUlprofos after tre
treating the plants and could be cons~d safely.