الفهرس 
Persistence of Monceren, Euparen, Rizolex and Thiram fungicides residues on treated cotton seeds ston·d at laboratory tempera I ureOnly 14 pages are availabe for public view
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Abstract
I _ Physical compatability was carried out between the used fungicides and herbicides. No
creamy separation, or precipitation. hut homoge nious emulsions or suspensions were observed.
The used herbicides decreased the fungicidal activity of colton seed coating fungicides which could
be a result of decreasing adsorption, increasing leaching and I or decreasing penetration through
the target
membrane.
2 _ The fungicitoxicity of Rizolex-T and Monceren - Euparcn was more detected in the media
against R. solani than that resulted from
rolfsii culture.
3. Cotton seed dressing with the recommended rates of Monceren - Eu-
.
paren, or Rizolex-T lowered the disease percent to 23.7 and 26.2 in
R. solani infestation; and 27.50 or 36.20 in rolfsii respectively.
4 _ High response of R. solani to fungicides application was found, it seems that
Monceren - Euparen was active against both fungi in greenhouse or in laboratory
experiments. Such data of greenhouse or field were almost similar germination of treated
cotton seeds com
pared with untreated.
5 . Cotoran or Stomp have no effect on the linear growth of R. solani and s_ rolfsii on
the media.
6 . The binary applications of fungicides - herbicides gave an antagonis tic or additive
effect depending on the concentration of the fungicide.
No synergistic effect of herbicides was detected. The antagonistic ef fect was clear in Rizolex-T
treatments at lower concentrations when mixed with Stomp while Cotman showed a lower effect.
Mixtures of Monceren - Euparen herbicides gave a stable tendency of antagonism decreasing the
fungitoxicity of Moncercn- Euparen treat ments up to 32.0 ppm.
7 . The co-toxicity factors of herbicides were less in values for
R. solani than those recorded for S.... rolfsii. Such effect was the same with Monceren - Euparcn,
where less values were detected in its her bicides mixtures than those of Rizolex-T mixtures.
However, the co
toxicity factor of Cotoran was clearly lower than of Stomp in all treat ments except with Rizolex-
T mixture against S. rolfsii.
8 . The in effectiveness Cotoran and Stomp on R., solani or rolfsii on media was
confinned in the greenhouse. These two herbicides did not affect the cotton seedlings survivals in
fungal- infc tcd soils. even when they were applied as binary applications with fungicides.
9 . l11e effect of Stomp in delaying the efficacy of Monccren - Euparen in increasing infection
with both fungi and Rizolex- T with R. sol ani was higher than that of Cotoran. Cotoran gave in
laboratory test an addi tive effect when mixed with Monceren - Euparen for growth inhibi tion
of both fungi and with Rizolex-T at 2.0 ppm only for R. solani.
I 0. The effect of adding superphosphate fertilizer on fungicidal activity of fungicide
-herbicide mixtures was slightly antagonistic in general.
However, such effect was highly detected with the mixtures of lower cone. of Monceren - Euparen
especially against R. solani.
II. The fungitoxicity of both Rizolex-T and Monceren- Euparen to
R. solani and S. rolfsii on media was significantly decreased by stor age of treated cotton seeds.
The gnmination of fungicidal treated cot ton seeds in greenhouse was reduced when stored before
sowing un der laboratory conditions.
The pre -emergence application of the herbicides on the soil that was sown with stored dressed
seeds showed an adverse effect on the cot ton seed germination and this should bad to a big damage
to the field crop.
12. The fungicide type and the storage period have an important role in determining the residual
activity of the tested fungicides treated on cotton seeds. It is evident that Thiram and Rizolex
rapidly decline within one month from storage, comparing with Moncercn and Eupar en their residual
activities were almost similar after 5 month from trat
ment table (14 ).