Effect the extracts of peppermint (Mentha spicata L.) in morphological deformations of mosquitoes Culex molestus Forskal (1775) (Diptera: Culicidae)

Al-Rahimy, Sarah Kadhim; Al-Essa, Rafid Abbas

doi:10.1063/1.5123107

Cited by 6 publications

(1 citation statement)

References 8 publications

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“…They are structurally similar to the insect ecdysone hormones that control the process of metamorphosis as the insects pass from larva to pupa and to adult. AZN treatment leads to morphological variations which are similar to the effects of ecdysteroid titers (Jagannadh and Nair 1992;Garcia et al 2006;Gnanamani and Dhanasekaran 2013;Sami et al 2016;Er et al 2017;Zhong et al 2017;Al-Rahimy et al 2019).…”

Section: Discussionmentioning

confidence: 78%

Journal of Plant Protection Research

Allahvaisi,

Hassani,

Heidari

2021

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The use of environmentally friendly bio-pesticides is crucial for higher root and sugar yield in sugar beets. The economic importance of beet moth [Scrobipalpa ocellatella Boyd. (Lepidoptera: Gelechidae)] losses in the field and storage highlight the need for evaluation of appropriate, environmentally friendly methods for pest control. The aims of the present study were to i) assess azadirachtin (AZN) effects on the life cycle and activity of the pest, and ii) manage the beet moth on roots under laboratory conditions. For the experiments, the main concentrations were prepared on the basis of the field-recommended dose of this pesticide (1-1.5 l/1000 l water). The LC 50 was estimated for 3rd instar larvae. Later, at sublethal concentrations, the relative time for the emergence of each developmental stage was determined. The mean female fecundity was 37% (±4) for treated tests at the lowest AZN concentration (0.5 ml • l -1 ). Assess azadirachtin at 0.5 ml • l -1 concentration resulted in 62 (±4) deposited eggs per plant for the treated roots and 326 (±1) for roots in the control test. Mortality increased in response to increased AZN concentrations. The results revealed that after 72 h, the highest AZN concentration (2.5 ml • l -1 ) caused 100% repellency and 82% (±1.38) mortality on 3rd instar larvae. According to our findings, a concentration of 2 ml • l -1 AZN (20 gr active ingredient per 1 hectare) after 4 days affected 1st instar larvae and the larvae with no further development had 92.2% (±1.2) mortality. In conclusion, the results revealed that AZN as a biorational pesticide can significantly minimize the losses of S. ocellatella on sugar beet crops.

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