Applied Entomology and Zoology (2014) 49, 483-486

Carlos Eduardo Souza Bezerra, Carlos Henrique Feitosa Nogueira, Márcia Mayara Sousa, Brígida Souza and Elton Lucio Araujo (2014)
Calcium hypochlorite for removing stalks on eggs of the green lacewing Chrysoperla genanigra (Neuroptera: Chrysopidae)
Applied Entomology and Zoology 49 (3), 483-486
Abstract: The release of lacewings eggs in the field requires the removal of their silk stalk, otherwise the release is impaired, as the eggs can become entangled in these pedicels. This study evaluated the effect of three concentrations of chlorine solution associated with two different exposure times for removing the stalks of eggs of Chrysoperla genanigra Freitas, and on the hatchability of the treated eggs. The concentrations used were 0.0 (control), 2.0, 4.0, and 6.0 % chlorine granules of hth® - containing as major components calcium hypochlorite and sodium chloride - dissolved in distilled water. The times used for each concentration were 60 and 120 s. Fifty eggs were used for each treatment. After each treatment, the eggs were washed in running water and then dried with a directed air flow. The best results were obtained with the concentrations of 2 % for 120 s and 4 % for 60 and 120 s, removing 100 % of stalks without reducing hatchability. At 6 %, egg destruction started to occur. We conclude that calcium hypochlorite can be used for removing stalks of C. genanigra eggs with no reduction in hatchability.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Elton L. Araujo

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
application technology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bemisia tabaci
Chrysoperla genanigra (predator)	Bemisia tabaci		Brazil (NE)