REVIEW OF LITERATURE

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naturally, were sensitized more than patients from distant places. The
immunochemical characterization revealed multiple protein fractions
from low to very high molecular mass (14-126 kDa) mostly in the acidic
pH range. Cedrus deodara pollen has been recognized as a new allergen
from India for the first time. The role of pollen as a causative agent of
respiratory allergic disorders is very well established, as is evident from
the recent increase of reports from across the world. India is blessed
with the richest flora on the earth, from alpine tundra to Rajasthan
desert. Consequently, it provides considerable variation in the quality
and quantity of airborne pollens in different ecogeographic regions of the
country. Although studies on the allergenic properties of airborne
pollens from various species have been carried out by several workers in
India, information on allergy to aerial pollen from Himalayan tree species
has been completely ignored.
Rao and Singh (2001) reported combinations of Azadirachta indica
and Cedrus deodara oil with piperonyl butoxide, MGK-264 and Embelia
ribes against Lymnaea acuminata. The binary and tertiary combinations
of plant-derived molluscicides Azadirachta indica and Cedrus deodara oil
with synergists MGK-264, piperonyl butoxide (PB) and fruit powder of
Embelia ribes were used against the Lymnaea acuminata. It was
observed that the toxic effects of these mixtures were time- and dose-
dependent. The binary and tertiary mixtures of plant-derived
molluscicides with synergists were more toxic with respect to the single