Abstract
BackgroundThe importance of Chrysoperla carnea (Steph.) (Neuroptera: Chrysopidae) as a predator is due to nourishing this predator on some dangerous pests as the cotton mealybug, Phenacoccus solenopsis Tinsley, belongs to Hemiptera: Pseudococcidae. So the predator C. carnea was used in the management of various pests. The basic aim of this study was the indirect effect of some natural materials against some stages of C. carnea through feeding of the predator on the treated prey, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae).ResultsThe results showed the comparison between the effectiveness of cinnamaldehyde and cinnamic oil in controlling the pest as soon as ineffectiveness on the predator. Cinnamaldehyde was very save against C. carnea which did not effect on the biology of it and the predator completed its life cycle as control (water + tween 80). Thus, the results suggested that cinnamaldehyde could be included in the Integrated Pest Management (IPM) Program without any adverse effect on bio-control agents used in an IPM.ConclusionThis study may be a great alternative to chemical pesticides in controlling cotton mealybug, P. solenopsis, and at the same time, this material is saving to the predator C. carnea. This alternative is cinnamaldehyde (the active ingredient of cinnamon oil).
Highlights
The importance of Chrysoperla carnea (Steph.) (Neuroptera: Chrysopidae) as a predator is due to nourishing this predator on some dangerous pests as the cotton mealybug, Phenacoccus solenopsis Tinsley, belongs to Hemiptera: Pseudococcidae
The previous studies indicate that five larvae C. carnea per 100 nymphs of the pest can be used as a biological control against P. solenopsis during the management program (Ibrahim 2018)
The aim of this study was to determine the effect of cinnamon oil and its active ingredient, Cinnamaldehyde, on the cotton mealybug, Phenacoccus solenopsis, and apply LC50 on P. solenopsis individuals to feed the prey C. carnea and show the indirect effect of these materials on the control agent
Summary
The importance of Chrysoperla carnea (Steph.) (Neuroptera: Chrysopidae) as a predator is due to nourishing this predator on some dangerous pests as the cotton mealybug, Phenacoccus solenopsis Tinsley, belongs to Hemiptera: Pseudococcidae. The cotton mealybug, Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae), is considered one of the most recent invasive sap-sucking insects in Egypt that is attacking cotton (El-Zahi et al 2016; Mostafa et al 2018), vegetables (Ibrahim et al 2015), and many other field crops of economic importance. This pest feeds on all the green parts of the infested plants. C. carnea larvae are extremely effective predators in the protected or enclosed areas such as greenhouses (Nayar et al 1976)
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