الفهرس 
The effect of pesticide combinationsOnly 14 pages are availabe for public view
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Abstract
Eleven potassium o-alkyl xanthates were synthesized, analyzed and its biological e f f e c t s were t e s t e d against Fusarium solani, -Rh-iz-oc-ton ia -aola-ni, Pythium ultimum and Aspergillus niger. Also, 4 commercial pesticides were tested a g a i n s t t h e same fungi. Phytotoxic e f f e c t s of xanthate d.erivatives were evaluated on bothe cotton and wheat seedlings. In t h i s r e s p e c t , t h e e f f e c t s on chloro- Phyll content, dry weight,fresh weight and e f f e c t s on both shoot and root systems were d-etemined. The data, of t h i s work coirld be summarized i n the following points:- (1) -.- The fung-i cidal action of the synthesized xanthate P .- . derivatives’against the different fun@ in liquid media : (a) In case of Fusarium solani, all derivatives were very toxic at concentration of ( M/IO ), At concentr tion of ( M/50 ), no hyphal growth was observed with all derivatives except iso-propyl, iso-butyl and heptyl derivatives, At concentration of (M/100), ethyl xanthate WRS the most toxic deriv~tive followed by methyl xanthate, The inversion phenomenon eppeared on using n-butyl which was more toxic at (~/5000 ) than (M/1000), also octyl xanthate which was more toxic at ( l%/1o4 ) than (~/5000) and (!~/10~). (b) In case of Aspergillus niger,all derivatives were very toxic at concentration of (M/IO) ,Ethyl,n-propyl and n-butyl xanthate were the most toxic derivattves ~t;co ncentr3.tion of (M/lOO)where they prevented the hyph~lg rowth.,At concentration of (M/500) ,heptyl xanthate 10s t its Lox?- c i t y a f t e r 72 hours only. A t concentration of (N/5 000) , d n-propyl xanthate was slightly toxic followed by ethyl xanthate, while other derivatives lost their toxicity.