scholarly journals Insecticidal Efficacy and Repellency of Trans-Anethole Against Four Stored-Product Insect Pests

2020 ◽  
Author(s):  
Mustafa ALKAN ◽  
Sait ERTÜRK
Keyword(s):  
Insect Pests ◽  
Insecticidal Efficacy

scholarly journals Field evaluation of extracts of five Nigerian spices for control of post-flowering insect pests of cowpea, Vigna unguiculata (L.) Walp.

2010 ◽  
Vol 41 (No. 1) ◽  
pp. 14-20 ◽  
Author(s):  
M. Oparaeke A ◽  
C. Dike M ◽  
I. Amatobi C
Keyword(s):  
Third World ◽  
Insect Pests ◽  
Limited Resource ◽  
Field Evaluation ◽  
Zingiber Officinale ◽  
Piper Guineense ◽  
Clavigralla Tomentosicollis ◽  
Insecticidal Efficacy ◽  
Lepidoptera Pyralidae ◽  
Xylopia Aethiopica

The insecticidal efficacy of aqueous extracts of five Nigerian spices (Piper guineense Schum and Thonn., Aframomum melegueta (Roscoe), Xylopia aethiopica (Dunal) A. Rich., Zingiber officinale L. and Capsicum annuum L.) was tested in a field study for the control of two important post-flowering insect pests, Maruca vitrata Fab. (Lepidoptera: Pyralidae) and Clavigralla tomentosicollis Stal. (Hemiptera: Coreidae) of cowpea. The extracts were applied at 10% (w/v) and sprayed every week for 4 weeks. P. guineense, followed by A. melegueta, significantly reduced (P < 0.01) abundance of the pests and decreased the damage to cowpea pods. Grain yields were significantly higher in plots treated with P. guineense and A. melegueta extracts compared to plots treated with other extracts. This technology is cheap, safe, environmentally friendly and easy to adopt by limited resource farmers in third world countries.

scholarly journals Diatomaceous earth used against insect pests, applied alone or in combination with Metarhizium anisopliae and Beauveria bassiana

2014 ◽  
Vol 54 (1) ◽  
pp. 62-66 ◽  
Author(s):  
Yasaman Shafighi ◽  
Masumeh Ziaee ◽  
Yobert Ghosta
Keyword(s):  
Beauveria Bassiana ◽  
Tribolium Castaneum ◽  
Metarhizium Anisopliae ◽  
Diatomaceous Earth ◽  
Insect Pests ◽  
Rhyzopertha Dominica ◽  
Continuous Darkness ◽  
Resistant Species ◽  
Insecticidal Efficacy ◽  
Laboratory Bioassays

Abstract Laboratory bioassays were conducted to assess the insecticidal efficacy of the formulation SilicoSec® used alone or in combination with isolates of entomopathogenic fungi, Metarhizium anisopliae (Metschinkoff) Sorokin and Beauveria bassiana (Balsamo) Vuillemin. SilicoSec® is a commercial diatomaceous earth (DE) formulation. Wheat was treated with 200 mg/kg of DE, 400 mg/kg of each isolates alone or a combination of them, against Tribolium castaneum Herbst, Rhyzopertha dominica (F.), and Oryzaephilus surinamensis L. The experiments were carried out at 27±1°C and 65±5% relative humidity (RH) in continuous darkness. The pathogenicity of all isolates was significantly low even after 7 days of exposure, with the exception of R. dominica. The isolates were virulent to the beetles, but the efficacy of the isolates was enhanced in combination with the DE. Tribolium castaneum was the most resistant species, followed by R. dominica. The findings indicated that the addition of the DE to the isolates increased the pathogenicity especially at the highest exposure interval. The addition of DE may provide satisfactory control of the insect-pests of stored products.

Insecticidal efficacy of fipronil against four stored-product insect pests: influence of commodity, dose, exposure interval, relative humidity and temperature

2010 ◽  
Vol 66 (6) ◽  
pp. 640-649 ◽  
Author(s):  
Nickolas G Kavallieratos ◽  
Christos G Athanassiou ◽  
Basileios J Vayias ◽  
Petri Christina C Betsi
Keyword(s):  
Relative Humidity ◽  
Insect Pests ◽  
Insecticidal Efficacy ◽  
Exposure Interval

scholarly journals Comparative Efficacy of Tephrosia vogelii and Moringa oleifera against Insect Pests of Watermelon (Citrullus lanatus Thumb)

2015 ◽  
Vol 51 ◽  
pp. 5-12 ◽  
Author(s):  
F.O. Alao ◽  
T.A. Adebayo
Keyword(s):  
Plant Extracts ◽  
Moringa Oleifera ◽  
Insect Pests ◽  
Block Design ◽  
Phyllotreta Cruciferae ◽  
Insecticidal Efficacy ◽  
Randomized Complete Block Design ◽  
Tephrosia Vogelii ◽  
Set Up ◽  
Fast Acting

Despite the fact that synthetic insecticides are fast acting, they constitute environmental hazard thereby necessitating the use of ecologically based alternative such as plant based insecticide. This experiment was conducted during the late and early planting seasons of 2011 to determine the insecticidal efficacy of Tephrosia vogelii and Moringa oleifera extracts at three tested concentrations (5, 10 and 20% v/v) against insect pests of watermelon. The experiment was set up in a randomized complete block design with three replicates. The results showed that M. oleifera extracts had 62% reduction of Phyllotreta cruciferae compared with T. vogelii which had 45% control. However, T. vogelii extracts had 64% control of Diabrotica undecimpunctata and Bactrocera curcubitea but M. olefera extracts had 50% control. The plant extracts proved effective against studied insects when compared with untreated plots. However, the effectiveness of the two plants extracts were concentration dependent. Therefore, the two plant extracts can be used in the control of insect pests of the watermelon

scholarly journals Comparative Efficacy of Tephrosia vogelii and Moringa oleifera against Insect Pests of Watermelon (Citrullus lanatus Thumb)

2015 ◽  
Vol 35 ◽  
pp. 71-78 ◽  
Author(s):  
F.O. Alao ◽  
T.A. Adebayo
Keyword(s):  
Plant Extracts ◽  
Moringa Oleifera ◽  
Insect Pests ◽  
Block Design ◽  
Phyllotreta Cruciferae ◽  
Insecticidal Efficacy ◽  
Randomized Complete Block Design ◽  
Tephrosia Vogelii ◽  
Set Up ◽  
Fast Acting

Despite the fact that synthetic insecticides are fast acting, they constitute environmental hazard thereby necessitating the use of ecologically based alternative such as plant based insecticide. This experiment was conducted during the late and early planting seasons of 2011 to determine the insecticidal efficacy of Tephrosia vogelii and Moringa oleifera extracts at three tested concentrations (5, 10 and 20% v/v) against insect pests of watermelon. The experiment was set up in a randomized complete block design with three replicates. The results showed that M. oleifera extracts had 62% reduction of Phyllotreta cruciferae compared with T. vogelii which had 45% control. However, T. vogelii extracts had 64% control of Diabrotica undecimpunctata and Bactrocera curcubitea but M. olefera extracts had 50% control. The plant extracts proved effective against studied insects when compared with untreated plots. However, the effectiveness of the two plants extracts were concentration dependent. Therefore, the two plant extracts can be used in the control of insect pests of the watermelon

scholarly journals Bioactivity and effects of spraying interval of selected plant extracts for control of pre-flowering insect pests of watermelon (Citrulus lanatus[Thunb.] Matsum. & Nakai)

2020 ◽  
Vol 116 (1) ◽  
pp. 107
Author(s):  
Alao FATAI OLAITAN ◽  
Adebayo THIMOTY ABIODUN ◽  
Olaniran OLADELE ABIODUN
Keyword(s):  
Plant Extracts ◽  
Moringa Oleifera ◽  
Insect Pests ◽  
Insect Infestation ◽  
Annona Squamosa ◽  
Cashew Nut ◽  
Lambda Cyhalothrin ◽  
Insecticidal Efficacy ◽  
Spraying Plants ◽  
Planting Season

<p>This experiment was conducted to determine the efficacy of plant extracts of <em>Tephrosial vogelii </em>Hook. f., <em>Moringa oleifera </em>Lam., <em>Annona squamosa </em>L. and cashew nut (<em>Anacardium occidentale </em>L.) at two intervals of spraying against major pre-flowering insect pests of watermelon. The results show that the effectiveness of each plant extracts depends on the interval of spraying. Plants sprayed at 7-day intervals had significantly less insect infestation when compared with that of 10-day interval of spraying. <em>T. vogelii</em> and <em>M. oleifera</em> had higher insecticidal efficacy than <em>A. squamosa</em> and cashew nut extracts but the applied plant extracts had the same insecticidal potential with Lambda-cyhalothrin against the observed insects during late planting season. Therefore, the plant extracts proved to be alternative to synthetic insecticide in the management of insect pests of watermelon at 7-day interval application sequence.</p>

scholarly journals Insecticidal Efficacy of Microbial-Mediated Synthesized Copper Nano-Pesticide against Insect Pests and Non-Target Organisms

2021 ◽  
Vol 18 (19) ◽  
pp. 10536
Author(s):  
Perumal Vivekanandhan ◽  
Kannan Swathy ◽  
Adelina Thomas ◽  
Eliningaya J. Kweka ◽  
Afroja Rahman ◽  
...  
Keyword(s):  
Insect Pests ◽  
Artemia Salina ◽  
Nano Particles ◽  
Stored Grain ◽  
Metarhizium Robertsii ◽  
Lower Toxicity ◽  
X Ray ◽  
Atomic Force ◽  
Insecticidal Efficacy ◽  
Afm Analysis

Currently, medical and stored grain pests are major concerns of public health and economies worldwide. The synthetic pesticides cause several side effects to human and non-target organisms. Copper nanoparticles (CuNPs) were synthesized from an aqueous extract of Metarhizium robertsii and screened for insecticidal activity against Anopheles stephensi, Aedes aegypti, Culex quinquefasciatus, Tenebrio molitor and other non-target organisms such as Artemia salina, Artemia nauplii, Eudrilus eugeniae and Eudrilus andrei. The synthesized copper nano-particles were characterized using, UV-vis spectrophotometer, Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Energy Dispersive X-Ray analysis (EDaX), High Resolution Scanning Electron Microscope (HR-SEM) and Atomic Force Microscope (AFM) analysis. Insects were exposed to 25 μg/mL concentration produced significant mortality against larvae of A. stephensi, A. aegypti, C. quinquefasciatus and T. molitor. The lower toxicity was observed on non-target organisms. Results showed that, M. robertsii mediated synthesized CuNPs is highly toxic to targeted pests while they had lower toxicity were observed on non-target organisms.

Insecticidal Efficacy of Abamectin Against Three Stored-Product Insect Pests: Influence of Dose Rate, Temperature, Commodity, and Exposure Interval

2009 ◽  
Vol 102 (3) ◽  
pp. 1352-1359 ◽  
Author(s):  
Nickolas G. Kavallieratos ◽  
Christos G. Athanassiou ◽  
Basileios J. Vayias ◽  
Spyridon B. Mihail ◽  
Željko Tomanović
Keyword(s):  
Dose Rate ◽  
Insect Pests ◽  
Insecticidal Efficacy ◽  
Exposure Interval

scholarly journals A quadruple-enterotoxin-deficient mutant of Bacillus thuringiensis remains insecticidal

Microbiology ◽  
2010 ◽  
Vol 156 (12) ◽  
pp. 3575-3583 ◽  
Author(s):  
Amy K. Klimowicz ◽  
Terry A. Benson ◽  
Jo Handelsman
Keyword(s):  
Bacillus Thuringiensis ◽  
Trichoplusia Ni ◽  
Insect Pests ◽  
Food Poisoning ◽  
Pcr Amplification ◽  
Gene Replacement ◽  
Deficient Mutant ◽  
Wild Type ◽  
Insecticidal Efficacy ◽  
Genes Encoding

Bacillus thuringiensis is the leading biopesticide used to control insect pests worldwide. Although they have a long record of safe use, under certain conditions commercial strains of B. thuringiensis have the ability to produce numerous putative enterotoxins that have been associated with food poisoning attributed to Bacillus cereus. Therefore, we designed a strategy to delete the genes encoding these toxins. B. thuringiensis strain VBTS 2477 contained genes encoding NHE, CytK-2 and three homologues of haemolysin BL (HBL, HBLa1 and HBLa2). This is the first report, to our knowledge, of a strain of B. cereus or B. thuringiensis containing three sets of hbl operons. The genes encoding HBLa1 and HBLa2 were 96–97 % identical to each other and 76–84 % identical to those encoding HBL. The hbla2 operon was detected by PCR amplification only after hbla1 was deleted. We used sequential gene replacement to replace the wild-type copies of the NHE and three HBL operons with copies that contained internal deletions that span the three genes in each operon. The insecticidal activity of the quadruple-enterotoxin-deficient mutant was similar to that of the wild-type strain against larvae of Trichoplusia ni, Spodoptera exigua and Plutella xylostella. This demonstrates that the genes for enterotoxins can be deleted, eliminating the possibility of enterotoxin production without compromising the insecticidal efficacy of a strain of B. thuringiensis.

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