A Simplified Technique for Mass Multiplication of Micromus igorotus Banks (Neuroptera: Hemerobiidae) on Sugarcane Woolly Aphid, Ceratovacuna lanigera Zehntner

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Authors

  • Department of Agricultural Entomology, University of Agricultural Sciences Dharwad-580005, Karnataka ,IN
  • Department of Agricultural Entomology, University of Agricultural Sciences Dharwad-580005, Karnataka ,IN
  • Department of Agricultural Entomology, University of Agricultural Sciences Dharwad-580005, Karnataka ,IN
  • Department of Agricultural Entomology, University of Agricultural Sciences Dharwad-580005, Karnataka ,IN

DOI:

https://doi.org/10.18311/jbc/2007/15045

Keywords:

Mass multiplication, Micromus igorotus

Abstract

Investigations were made for identifying laboratory host, ovipositional substrate, adult and larval containers for laboratory mass multiplication of Micromus igorotus Banks at the Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad. Among the different hosts evaluated, Aphis gossypii Glover was the most suitable as it recorded the highest feeding potential (733.62 aphids/adult) and fecundity (837.96 eggs), followed by Ceratovacuna lanigera Zehntner and Uroieuon earthami (Hille Ris Lambers) except in terms of adult longevity which was longer on C Lanigera. Among the four different ovipositional substrates provided for egg laying, maximum numbers of eggs were laid on cotton (784.74 eggs I female) and thread (774.42), followed by corrugated brown paper (340.2) and black card sheet (335.8). When blaek card sheet and corrugated brown paper were provided, 19.32 and 23.93 per cent eggs were laid on extra ovipositional substrates respectively, which were difficult to harvest. For adult rearing, plastic container [[18.75 cm (ht) x 9 cm (dia m)] or container]] [25 cm (ht) x 11.25 cm (dia m)] with 25 pairs per container can be used to barvest the maximum number of eggs. For larval rearing. plastic box with ventilated lid [10.00 em (ht) x 25.50 cm (dia m)] with 75 larvae per container recorded significantly higher per cent pupation (92.89) and adult emergence (83.26).