The Contact And Systemic Effects Of Different Neem Formulations (Azadirachta Indica Ajuss)On The Landy Bird Beetle Hippodamia Variegata Goeze (Coleoptera : Coccinellidae)

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Date
2015-05-11
Authors
Hamd, Elfatih Elnour Abdalla
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Publisher
UOFK
Abstract
Four greenhouse experiments were conducted at Shambat to investigate the systemic and contact effects of different neem formulations on the coccinellid Hippodamia variegata Goeze. The first experiment dealed with the use of neem seed water extract (2.5%), celaflor® 4ml/L (commercial neem formulation) and Sumicidin® 20%Ec (0.5ml/L) which were sprayed directly on the different developmental stages of the coccinellid. The second experiment was about feeding of the coccinellid (larvae/adults) on aphid treated topically with the neem seed water extract (2.5%), celaflor® 4ml/L and sumicidin®. The third experiment included feeding of the coccinellid (larvae/adults) on aphid treated systemically with neem seed kernel powder (25, 50 and 75g) applied at the soil. The fourth one was conducted to investigate the effect of aphid aqueous extract (Kairomone) and neem seed water extract, as sprayed on plants, on the coccinellid. The results indicated that sumicidin® was the most effective on the different developmental stages of the coccinellid specially the larvae compared to the neem products, while neem seed water extract showed the least effect compared to celaflor®. The results also indicated that feeding of coccinellid on aphid treated topically was the most effective treatment compared to direct spraying and aphid treated systemically. Also the results indicated that feeding of coccinellid on aphid treated systemically gave weak effect on the larvae and adults of coccinellid as compared with other treatments. The coccinellids fed on treated aphid showed an increased longevity as compared with sumicidin® and control. The application of neem seed water extract altered the searching pattern of the coccinellid.
Description
September , 2003
Keywords
Neem
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