GASTROPOD INFESTATION IN PLANT NURSERIES AT DIFFERENT LOCATIONS AND THEIR MANAGEMENT WITH LATEX OF SOME PLANTS Thesis
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Date
2011
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PAU Ludhiana
Abstract
Survey of five plant nurseries at different locations viz. New Indian nursery and Gulrej
nursery at Dhuri, Bhagwaan and Golden nursery at Malerkotla and Plant nursery PAU,
Ludhiana for gastropod population revealed that one snail, Macrochlamys indica and one
slug, Filicaulis alte Ferussac with three colour forms viz. black slug with yellow mid-dorsal
streak, brown slug with black spots, black slug were infesting the plant nurseries. Slugs and
snails preferred soil with low bulk density, high porosity and high moisture. Impact of three
treatments on gastropod (snails and slugs) trapping was in following order- Damp conditions
> Beer traps > Spots with Spinach. Snails and slugs excavated holes within leaves of
ornamental plant saplings. More damage was observed during the months of June, July and
October when the population density of snails and slugs active at soil surface was more.
Hence, more emphasis should be laid down on gastropod control during the months of June,
July and October to prevent the damage to ornamental plant saplings. Laboratory feeding tests
revealed that out of the different concentrations of crude latex of different plants viz.,
Euphorbia splendens, Calotropis procera, Ficus bengalensis and Ficus elastica, bait with 2
per cent crude latex of E. splendens proved to be most effective bait resulting in 36.7 per cent
mortality (F. alte, black slug with yellow mid-dorsal streak) with highest consumption among
all the different concentrations of all the four plants. Thus, E. splendens latex acts not only as
molluscicide but as attractant also.
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