author(s)
M Maheswari and G Govindaiah

abstract
Leaf roller Diaphania pulverulentalis damage is one of the major problem in mulberry growing areas which affect both quality and yield of mulberry leaf. The leaf extracts of Lantana camara (11%), Azadirachta indica (20%), Vitex negundo (25%), cloves of Allium sativum (15%) and rhizome Zingiber officinale (15%) have been evaluated against second and third instar larvae of leaf roller. The results revealed that, by 144 hr. the methanol extract of the botanicals exhibited maximum mortality of second (85-95%) and third instar larvae (85-95%) compared to aqueous extract (68-82%) and (58-76%) respectively. Larvicidal effect of the extracts on second and third instar larvae of leaf roller have been investigated in a dose dependent manner for every 24 hr. including the mortality of pupae, adults, deformed pupae and moths also. Also the high percent of mortality of pupae (2-16%) and adult (2-6%) was noticed in case of the larvae treated with aqueous extracts compared to methanol extracts treated larvae. Among the extracts tested, the aqueous extract of lantana at lower concentration i.e. 11% has recorded the mortality percent of second and third instar larvae of leaf roller up to 69% and it was found to be better in controlling the leaf rollers compared to other extracts and safe for silkworm without any harm.