To estimate the ecological relationship of wild weeds with Hymenopteran pollinator experiments were conducted on Tephrosoria purpurea (L.) Pers and Trichodesma amplexicaule Roth. These plants are natural insecticides in nature so have the great economical importance in the study area. A sum of 17 bees species have been observed on Tephrosoria purpurea and Apidae family has been observed as the most abundant family followed by Megachilidae, Halictidae and Andrenidae. Trigona iridipennis Smith was reported as the most abundant bee while Megachile bicolor (Fab) as the least abundant bee. A sum of 15 bee species has been reported on Trichodesma amplexicaule on the day of observation. Apidae family was observed as most abundant family while Halictidae family observed as least abundant. Trigona iridipennis Smith was highest reported on both of the plants. Foraging rate has been observed in term of number of flowers visited by bees per minute in the different time intervals of the day. It was observed that peak foraging was observed in the noon between 10 hrs and 15 hrs when there were low humidity and high temperature as compared to morning (before 10 hrs) and afternoon (15 hrs). Result expressed a great relationship between activity of bees and abiotic factors of ecosystem. Apis florea and Nomia elliotii Smith were observed as the most frequent visitors on Tephrosoria purpurea while Andrena spp was observed as least frequent bee during the peak foraging time. On the other hand Apis dorsata and Megachile femorata Smith bees have been observed as most frequent visitors on Trichodesma amplexicaule and Nomia elliotii Smith as the least frequent bee. Foraging activity of bees in different time intervals of the day was statically analyzed by ANOVA. Result indicated that Null Hypothesis cannot be accepted because of P-Value were less than level of significance in both the cases. Experimental plants were found to be important for the survival of bee fauna in the stressful conditions of Thar Desert by providing pollen and nectar for nutrition.