Abstract

Artemisia herba alba and Allium sativum grow in Sinai peninsula and, Northern area of Egyptian Delta respectively. Both extracts plants were evaluated as anti–insect products in an effort to develop alternative insecticides considering the environment. The effect of Artemisia and Allium extracts on some Biological aspects as well as some digestive enzymes changes after treatment with those extracts have been studied. The results indicated that treatment the 3rd instar larvae of Spodoptera littoralis for 24hours revealed satisfactory effect in larval mortality (50%) and significant prolongation for both larval and pupal durations. This prolongation was accompanied with a decrease in the percentage of pupation and adult emergence. Digestive enzymatic activities were pronounced on estimation of Trehalase, Invertase and Amylase manifested obvious changes in the treated larvae of Spodoptera littoralis.

Highlights

  • Considerable progress has been achieved over the last two decades by producing Eco friendly bioinsecticides, Bioactive compound synthesis of plant extract leaves (R.Ramanibie et al, 2015)

  • Short- term biological activity: Data given in Table (2) clearly show that there is a remarkable effect on development of larvae fed on concentrations of Artemisia, and Allium, which prolonged the larval and pupal duration but in different values due to the type of each plant extract,the tested plant extracts could be arranged descendingly according to both larval and pupal duration as Artemisia 3% < Artemisia 1% < Allium 5% < Allium 3%

  • Long – term biological activity: In this part of investigation pointed to evaluate the effects of the early 3rd instar larvae of S. littorals which treated with the tested plant extracts on the resultant successive stages including the percentages of both pupation and adult emergence

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Summary

Introduction

Considerable progress has been achieved over the last two decades by producing Eco friendly bioinsecticides, Bioactive compound synthesis of plant extract leaves (R.Ramanibie et al, 2015). Several plant extracts or isolated active compound have been studied as a potent acute or effective insecticides (Abdel Aziz, 2007). Artemisia herba-alba (white wormwood) family Asteraceae is a perennial shrub that grows commonly on the steppes of Northern Africa, Arabian Peninsula, Western Asia and Southwestern Europe. It is widely used in folk medicine for its antiseptic, vermifuge and antispasmodic properties. The leaves of sterile shoots are grey, petiolate, ovate to orbicular in outline, whereas, the leaves of flowering stems, more abundant in winter

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