Phytochemistry and insecticidal activity of Annona mucosa leaf extracts against Sitophilus zeamais and Prostephanus truncatus

2020 ◽  
pp. 1-13
Author(s):  
Albert Mulianga Makenzi ◽  
Lawrence Onyango Arot Manguro ◽  
Philip Okinda Owuor
Keyword(s):  
Insecticidal Activity ◽  
Sitophilus Zeamais ◽  
Prostephanus Truncatus ◽  
Leaf Extracts

scholarly journals Bioprospecting insecticidal compounds from plants native to Mato Grosso do Sul, Brazil

2008 ◽  
Vol 22 (4) ◽  
pp. 1136-1140 ◽  
Author(s):  
Antonio P. Souza ◽  
Maria R. Marques ◽  
Talal S. Mahmoud ◽  
Bruno A. Caputo ◽  
Gabriel M. Canhete ◽  
...  
Keyword(s):  
Insecticidal Activity ◽  
Sitophilus Zeamais ◽  
The Other ◽  
Leaf Extracts ◽  
Mato Grosso ◽  
Wheat Grains ◽  
Insecticidal Effect ◽  
Old Adult ◽  
Mato Grosso Do Sul ◽  
Insecticidal Compounds

This paper reports on an evaluation of the insecticidal activity of extracts prepared from leaves of Tapirira guianensis Aubl. (Anacardiaceae), Attalea phalerata (Mart. ex Spreng.) Burret (Arecaceae), Eugenia uniflora L. (Myrtaceae), and Gomphrena elegans Mart. (Amaranthaceae) and from stems of Myracrodruon urundeuva Allemão (Anacardiaceae). Four extracts and 18 fractions with a range of polarities were tested. Ten-gram batches of wheat grains were each nebulized with 1 mL of a separate extract at 10% w/v. After solvent evaporation at 38 ºC, the grains were placed into flasks along with 20 unsexed 10- to 20-day old adult individuals of Sitophilus zeamais. The assessment was carried out on the fifth and tenth day by counting and discarding the dead insects. Leaf extracts of G. elegans showed an insecticidal effect ranging from 27% to 60% by the fifth day, whereas the effect of the remaining extracts tested (if active at all) did not exceed 20% in the same period. By the tenth day, the most active extracts were those of A. phalerata (hexanic, 36.5%) and all those of G. elegans (5280.5%), whereas the effect of the other extracts did not exceed 30%.

Insecticidal activity of the ether extract from the lichen Ramalina complanata and an isolated metabolite (divaricatic acid) against Sitophilus zeamais (Coleoptera, Curculionidae)

2021 ◽  
pp. 102049
Author(s):  
André Severino da Silva ◽  
Camila Soledade de Lira Pimentel ◽  
Fábio Henrique Galdino dos Santos ◽  
Hallysson Douglas Andrade de Araújo ◽  
Patrícia Maria Guedes Paiva ◽  
...  
Keyword(s):  
Insecticidal Activity ◽  
Sitophilus Zeamais ◽  
Ether Extract

scholarly journals Effectiveness of Improved Hermetic Storage Structures Against Maize Storage Insect Pests Sitophilus zeamais and Prostephanus truncatus

2018 ◽  
Vol 10 (8) ◽  
pp. 100
Author(s):  
Tadele Tefera ◽  
Addis Teshome ◽  
Charles Singano
Keyword(s):  
Weight Loss ◽  
Insect Pests ◽  
Sitophilus Zeamais ◽  
Research Station ◽  
Prostephanus Truncatus ◽  
Storage Pests ◽  
Hermetic Storage ◽  
Percentage Weight ◽  
Small Holder Farmers ◽  
Storage Structures

A study was conducted for 12 months to evaluate the effectiveness of two improved hermetic storage structures against two maize storage pests Sitophilus zeamais and Prostephanus truncatus at Liwufu Research Station, Malawi. The storages were metal silo and hermetic bag; Actellic super dust was included as a control. The treatments (storages) were replicated four times under natural and artificial infestations. Grain stored in metal silo had the lowest mean percentage weight loss, 1.04% to 1.25%, 12 months after storage followed by hermetic bag, 2.46% to 6.64%. Grain treated with Actellic super had the highest weight loss, 4.86% to 18.72%. The study showed that hermetic storage structures can be promoted as effective alternative non-chemical methods of grain storage for small holder farmers in Malawi.

scholarly journals Insecticidal and repellent activity of the essential oil of Cinnamomum camphora var. linaloolifera Y. Fujita (Ho-Sho) and Cinnamomum camphora (L.) J Presl. var. hosyo (Hon-Sho) on Sitophilus zeamaisMots. (Coleoptera, Curculionedae)

2015 ◽  
Vol 17 (4 suppl 1) ◽  
pp. 769-773 ◽  
Author(s):  
R.L. CANSIAN ◽  
V. ASTOLFI ◽  
R.I. CARDOSO ◽  
N. PAROUL ◽  
S.S. ROMAN ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Insecticidal Activity ◽  
Sitophilus Zeamais ◽  
Repellent Activity ◽  
Cinnamomum Camphora ◽  
Preference Index ◽  
Lethal Doses ◽  
Repellency Activity

ABSTRACT The aim of this work was to evaluate the insecticidal and repellency activity of the essential oil of Cinnamomum camphora var. linaloolifera Y. Fujita (Ho-Sho) and Cinnamomumcamphora (L.) J Presl.var. hosyo (Hon-Sho), against the Sitophilus zeamais in maize grains. The essential oils were obtained by hydrodistillation and analyzed by GC-MS.The insecticidal activity was determined by the toxicity of different concentrations of essential oils during 24 hours of contact with the insects, in the absence of feed substrate. The Bioassays of repellency were conducted with lethal doses (LD50,LD25,and LD12.5) obtained from insecticidal bioassay. In order to compare the treatments the preference index (PI) was employed. The analysis of the essential oils of Cinnamomum camphora leaves indicated 68% of camphor and 9% of linalool for the variation Hon-Sho and 95% of linalool to the variation Ho-Sho. The variation Ho-Sho presented greatest insecticidal activity than the variation Hon-Sho against the Sitophiluszeamais, with LD50 of 0.35 μL/cm2, whereas in the variation Hon-Sho the ratewas 0.48 μL/cm2. However, considering only the concentrations of linalool and camphor of Ho-Sho and Hon-Sho, the lethal doses’ evaluation of these compounds were similar. The values of the preference index ranged from -0.3 to -0.8 for thevariation Ho-Sho and -0.2 to -0.7 for the variation Hon-Sho. The essential oils evaluated in this work showed repellent activity against Sitophiluszeamais in vitro and in trials performed in mini-silos.

scholarly journals Bioactivity and Volatile Profiling of Azadirachta indica Leaves for the Management of Maize Weevil, Sitophilus zeamais (Motsch.) Infestations

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
A.G.W.U. Perera ◽  
M.M.S.C. Karunaratne ◽  
S.D.M. Chinthaka
Keyword(s):  
Azadirachta Indica ◽  
Solid Phase ◽  
Biological Activities ◽  
Sitophilus Zeamais ◽  
Gas Chromatography Mass Spectrometry ◽  
Solid Phase Micro Extraction ◽  
Leaf Extracts ◽  
Maize Weevil ◽  
Biological Potential ◽  
Wide Range

Neem (Azadirachta indica A. juss), is known to possess a wide range of pharmacological properties and is thus commercially exploitable. Apart from its medicinal potential, a considerable progress has been achieved regarding biological potential and chemical composition of the leaves which is an ever-increasing interest to the scientific community. During this study, biological phenomena and secondary metabolite composition of A. indica leaves were examined in the management of Sitophilus zeamais on stored maize. Insecticidal and repellent potential of A. indica leaf powders were evaluated in both contact and fumigant forms. Phytochemical screening of 11 phyto constituents was performed following the standard procedures for n-hexane, dichloromethane, ethyl acetate, methanol and aqueous leaf extracts. Volatile profile of A. indica leaves was characterized by employing headspace-solid-phase micro extraction coupled with gas chromatography-mass spectrometry (HS-SPME/GC-MS). Over 60% weevil repellency was recorded at doses above 23.33%, whereas 100% and 67% contact and fumigation mortalities were observed respectively, 9 days after treatment at the dose of 33.33% and the respected LD50 values were 1.56 g and 4.48 g. Thirty two volatile compounds were identified in three distinct chemical classes (Monoterpenoid, sesquiterpenoid and purine nucleosides). γ-Elemene (24.06%), 3,7 (11)-eudesmadiene (6.83%), caryophyllene (6.40%), and 10s,11s-himachala-3(12),4-diene (6.36%) were the major constituents of neem leaf volatiles, followed by other compounds present in less than 4% which might be responsible for varied biological activities observed. Thus the odour impact of the bioassayguided study clearly implies that A. indica leaves can be harnessed against S. zeamais infestations.Keywords: Azadirachta indica, Sitophilus zeamais, headspace-solid-phase micro-extraction, insecticidal activity, repellency

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