Surveys were conducted to find out the host plants of Cuscuta reflexa Roxb. from different localities of Baramati area of Pune District of Maharashtra, India. Host plants were examined for anatomical and biochemical studies. In a survey 29 species, representing 23 genera belong to 15 families were recorded as host plants of Cuscuta. Cuscuta haustorium penetration in host stem and size of the haustorium was specific to host and Cuscuta species. Each transverse section of host stem shows Cuscuta haustorium reached up to the secondary xylem. Polyphenol oxidase activity studied in healthy and infected stem of Bougainvilliea spectabilis, Ficus glomerata, Vitex negundo, Santalum album and Acalypha hispida. The common trend of enzyme activity is stimulatory in infected host plants. Protein content studied in healthy and infected host plants of Bougainvilliea spectabilis, Ficus glomerata, Vitex negundo, Santalum album and Acalypha hispida by C. reflexa Roxb. It is interesting to note that the protein content is markedly stimulated in all infected host plants. The maximum stimulation occurs in Bougainvilliea spectabilis, Vitex negundo, Santalum album and Acalypha hispida compared to Ficus glomerata.
