Creative Commons License 2018 Volume 5 Issue 2

Assessment of Biorational Botanical Extracts on the Desert Locust Schistocerca Gregaria Forskal (Orthoptera: Acrididae


Mamdouh I. Nassar, Ghazawy N. A., Torkey H. M., Rawy S. M.
Abstract

In the current study, the Biorational Botanical Extracts on the Desert Locust Schistocerca gregaria Forskal (Orthoptera: Acrididae) were assessed. The most effective plant extract (with) was Azadirachta indica. The recoded LC50 value was 1.39x102 and 25.13 mg/ml (for normal hexane and methylene chloride solvents, respectively). Nymph's duration was prolonged about 7 days with formulated A. indica and Citrullus colocynthis. Also nymphs suffered from weight loss and died before reaching the 5th instar. A sub-lethal dose of A. indica (LC10) led to detachment of the hypodermis or displacement of the basement membrane of the cuticle. Increased dose (LC25) led to complete dissolution of the hypodermal walls. A. indica extract (LC10) also caused enlargement of the mid-gut epithelium and rupture of some cells within. These effects were manifested after 28 days’ post treatment. A higher dose (LC25) led to destruction of the brush border and after 28 days, led to dissolution of the cytoplasm and appearance of vacuoles. C. colocynth extract (LC10) caused detachment of the nidii; after 28 days, nuclei lost their appearance and a higher dose (LC25) led to compete dissolution of the nuclei.


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Entomology and Applied Science Letters is an international double-blind peer reviewed publication which publishes scientific research & review articles related to insects that contain information of interest to a wider audience, e.g. papers bearing on the theoretical, genetic, agricultural, medical and biodiversity issues. Emphasis is also placed on the selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance. In addition to full-length research articles and reviews, the journal publishes interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.

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Entomology and Applied Science Letters supports the submission of entomological papers that contain information of interest to a wider reader groups e. g. papers bearing on taxonomy, phylogeny, biodiversity, ecology, systematic, agriculture, morphology. The selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance is also important. Distinguished entomologists drawn from different parts of the world serve as honorary members of the Editorial Board. The journal encompasses all the varied aspects of entomological research.