| Autor: |
Kirsur, Mukund V., Sakthivel, N., Mahimasanthi, A., Balasaraswathi, S., Bindroo, B. B. |
| Předmět: |
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| Zdroj: |
Indian Journal of Sericulture; Jun2014, Vol. 53 Issue 1, p78-80, 3p |
| Abstrakt: |
Rapaya mealybug, Paracoccus marginatus Williams Granara de Willink (Hemiptera: Pseudococcidae) is a polyphagous alien pest reported to infest over 80 plant species in India including number of agricultural and horticultural crops, ornamental plants, trees and weed species (Selvaraju and Sakthivel, 2011). Mulberry (Morus alba L.), the food plant of silkworm (Bombyx mori L.) is highly susceptible to this pest and its continued menace in Tamil Nadu after outbreak in 2009, poses threat to sericulture throughout the year (Sakthivel, 2013). The pest feeds on phloem sap of mulberry plants both from stem and leaf resulting in loss of moisture and decline in nutritional values. Growth of dense black sooty mould on leaves over the honey dew excreted by the pest makes them unfit to feed silkworm. Feeding papaya mealybug affected mulberry leaves adversely affects the economic traits of silkworm and silk yield (Sakthivel et al. 2011). Number of weed species in mulberry garden serves as alternate host to the papaya mealybug. From these weeds, the pest easily migrates to the new sprouts after each pruning and build up its population heavily on plant maturity (Sakthivel et al. 2012) which renders repeated incidence. Therefore, identification of weed species harbouring the papaya mealybug population in mulberry ecosystem could help to draw proper management strategies to prevent shifting of this pest from weeds to mulberry and vice versa. Occurrence of papaya mealybug on weed flora in mulberry garden was thus examined in monthly intervals by visual observation in three districts of Tamil Nadu viz Salem, Namakkal, Dharmapuri, [ABSTRACT FROM AUTHOR] |
| Databáze: |
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