Insecticidal Activity of some Plants Powder on Maize Weevil (Sitophilus zeamais Motschulsky) of Stored Maize Grains (Zea mays L)

2022 ◽  
Vol 22 (1) ◽  
pp. 112
Author(s):  
Suleiman Abdul ◽  
Fatima Sawa ◽  
Caleb Obadia
Keyword(s):  
Zea Mays ◽  
Insecticidal Activity ◽  
Zea Mays L ◽  
Sitophilus Zeamais ◽  
Maize Weevil

scholarly journals Efficacy of Cymbopogon citratus Stapf leaf extract as seed protectant against Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) on stored maize (Zea mays L.)

2017 ◽  
Vol 30 (4) ◽  
pp. 220
Author(s):  
Diligent Oboho ◽  
Joseph Eyo ◽  
Felicia Ekeh ◽  
Solomon Okweche
Keyword(s):  
Zea Mays ◽  
Aqueous Extract ◽  
Leaf Extract ◽  
Sitophilus Zeamais ◽  
Cymbopogon Citratus ◽  
Maize Weevil ◽  
Level Of Significance ◽  
Filter Papers ◽  
Acetone Extracts ◽  
Chloroform Methanol

A laboratory experiment was conducted to evaluate the insecticidal property of <em>Cymbopogon citratus</em> leaf extract as seed protectant against maize weevil. One (1) gram each of acetone, chloroform, methanol and aqueous extracts were re-suspended in 5 ml of deionized water and used to impregnate filter papers set in four replicates. Varied concentrations of the aqueous extract per 50 g of <em>Zea mays</em> grains infested with 10 pairs of sexed <em>Sitophilus zeamais</em> for 28 days were tested for insecticidal properties and compared with experimental and synthetic conventional insecticide [Coopex (0.25 g)] controls. Parameters assessed were effect of <em>C. citratus</em> extracts on weevil mortality (toxicity test) and protection of maize against <em>S. zeamais</em>. Data obtained were analyzed using Analysis of Variance (ANOVA) and means were separated using New Duncan Multiple Range Test at 5% level of significance. Results showed significant (P &lt; 0.05) concentration and duration dependent mortalities of <em>S. zeamais</em>. The aqueous extract gave the highest protection of the maize grains followed by chloroform, methanol and acetone extracts respectively. The insecticidal potency of <em>C. citratus</em> extracts and its availability places it as an attractive biopesticide in traditional post-harvest seed protection.

IMPACT OF HUSK TYPE AND SPECIES OF INFESTING INSECTS ON AFLATOXIN CONTAMINATION IN PREHARVEST CORN AT TIFTON, GEORGIA

1987 ◽  
Vol 22 (4) ◽  
pp. 307-310 ◽  
Author(s):  
W. W. McMillian ◽  
N. W. Widstrom ◽  
D. M. Wilson
Keyword(s):  
Zea Mays ◽  
Aspergillus Flavus ◽  
Spodoptera Frugiperda ◽  
Ostrinia Nubilalis ◽  
Zea Mays L ◽  
Heliothis Zea ◽  
Aflatoxin Contamination ◽  
Sitophilus Zeamais ◽  
Corn Borers ◽  
Dent Corn

The use of plants that resist insects has been suggested as a potential means of reducing aflatoxin contamination in some crops. Dent corn, Zea mays L., germplasm possessing the characteristic of a relatively tight, complete husk cover and germplasm possessing the characteristic of a relatively loose, incomplete husk cover on the ear were evaluated for 3 years at Tifton, GA, for aflatoxin contamination. In two of the three test years, corn ears with tight, complete husk cover sustained significantly lower mean amounts of aflatoxin than ears with loose, incomplete husk cover following artificial inoculation with Aspergillus flavus Link spores. Ears hand-infested with maize weevils, Sitophilus zeamais (Motschulsky), sustained significantly higher amounts of aflatoxin (329 ng·g−1) than ears infested with fall armyworms, Spodoptera frugiperda (J. E. Smith), (80 ng·g−1), European corn borers, Ostrinia nubilalis (Hübner), (71 ng·g−1), or corn earworms Heliothis zea (Boddie) (60 ng·g−1). Overall, ears in the check (inoculated with A. flavus only) sustained significantly lower aflatoxin (37 ng·g−1) amounts than ears from plots supplemented with insects. Although insects were not applied in the check plots, some damage was observed on the ears.

scholarly journals Possível fonte de resistência ao caruncho (Sitophilus zeamais Motschulsky, 1855) em Milho-de-palha(Zea Mays, L.)

Bragantia ◽  
1978 ◽  
Vol 37 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Jorge Alberto Marques Rezende ◽  
João Rubens Zinsly ◽  
Carlos Jorge Rosseto ◽  
Violeta Nagai
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Heliothis Zea ◽  
Sitophilus Zeamais ◽  
Lepidoptera Noctuidae

Estudou-se em condições de laboratório o comportamento, em relação ao Sitophilus zeamais Motschulsky 1855 (Coleoptera, Curculionidae), de milhos sintéticos (composto flint, composto dent. e centralmex), híbridos comerciais (Ag 152 e Hmd 7974), pipoca comercial (pirapoca) e um milho supostamente resistente (acre). Analisaram-se as correlações. existentes entre o comprimento da palha além da ponta da espiga, compacidade, dureza do grão, ataque de Heliothis zea Boddie, 1850 (Lepidoptera, Noctuidae), com o ataque de Sitophilus zeamais. Os resultados sugerem que o fator mais importante na resistência do milho-em-palha, a Sitophilus zeamais é a compacidade da mesma, vindo em segundo lugar o furo causado pela saída da lagarta Heliothis zea que atinge o solo para entrar no estádio de pupa.

scholarly journals Influência de diferentes sistemas de adubação na composição nutricional do milho Zea mays L. (Poaceae) e seus efeitos no ataque de Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) no produto armazenado

2007 ◽  
Vol 28 (1) ◽  
pp. 51 ◽  
Author(s):  
Alberto Luiz Marsaro Júnior ◽  
Sonia Maria Noemberg Lazzari ◽  
Jacimar Luís de Souza ◽  
Flavio Antonio Lazzari ◽  
Lys Mary Bileski Cândido
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Sitophilus Zeamais

scholarly journals Características físico-químicas de grãos de milho atacados por Sitophilus zeamais durante o armazenamento

2011 ◽  
Vol 15 (6) ◽  
pp. 615-620 ◽  
Author(s):  
Luidi E. G. Antunes ◽  
Priscila C. Viebrantz ◽  
Roberto Gottardi ◽  
Rafael G. Dionello
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Sitophilus Zeamais

O objetivo do trabalho foi avaliar os danos físicos e químicos causados por insetos adultos da espécie Sitophilus zeamais (Motschulsky) (Coleoptera: Curculionidae), criação própria sob condições controladas (25±5 ºC e 60±10% UR), em grãos de milho híbrido (Zea mays L.) AS-32, oriundos de lavoura experimental, durante três períodos de armazenamento: 30, 60 e 120 dias. O experimento ocorreu nas mesmas condições e foi constituído de quatro repetições de 600 g de grãos com 150 insetos para cada tratamento. As análises realizadas também com o produto "in natura" foram: umidade, perda de peso dos grãos, peso de 1000 grãos, tecnológica de defeitos, extrato etéreo, proteína bruta e variação populacional (emergência, mortalidade e sobrevivência dos insetos). No maior período avaliado (120 dias) ocorreram as maiores perdas de peso, presença de grãos carunchados, grau de umidade, variação populacional e menor peso de 1000 grãos e extrato etéreo. Pode-se concluir, com base nesses resultados, que quanto maior o período de contato dos insetos com os grãos maiores são os danos causados e os prejuízos para os produtores.

scholarly journals Olfactory responses of Sitophilus zeamais L. to bushmint leaf powder and methanol extract on stored maize

1970 ◽  
Vol 29 (1) ◽  
pp. 1-12
Author(s):  
A.M. Noudegbessi ◽  
O.Y. Alabi ◽  
R. Sikirou
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Methanol Extract ◽  
Adult Mortality ◽  
Sitophilus Zeamais ◽  
Olfactory Responses ◽  
Hyptis Suaveolens ◽  
Leaf Powder ◽  
Maize Grain ◽  
Adult Weevil

Bushmint (Hyptis suaveolens Poit) is a weed with pesticidal properties that have been explored in managing pests of agricultural and medicinal importance. The objective of this study was to evaluate the repellence ability of Hyptis suaveolens to prevent infestation of stored maize grain seed. The study involved evaluation of the olfactory responses of adult weevil to maize (Zea mays L.) grains treated with 5, 10, 15 and 20% concentrations of leaf powder (LP) and methanol extract (ME) of Hyptis suaveolens in the laboratory, with a static air four-chamber olfactometer. Also, the insecticidal effects of the substances on adult mortality and oviposition on maize grains treated with LP and ME were determined in a completely randomised design, with four replicates. The number of weevils in ME chambers decreased with increase in concentration of extracts; while the LP chambers had consistently fewer weevils with numbers, ranging from 2.5 to 3.75. Adult mortality in maize treated with LP was the least and varied between 0.00 (15% concentration) and 2.54% (20% concentration). Maize grains with ME caused significant mortalities that ranged from 65.50% at 15% concentration to 94.92% at 10% concentration. More eggs (3.5 to 5.75) were laid on maize with LP compared with ME treated maize. Generally, ME was richer in phytochemicals than LP. Hyptis suaveolens repellence manifested more in the form of LP than as ME; though ME caused more adult mortality and reduced oviposition than LP.

scholarly journals CONTROL DE GORGOJO (Sitophilus zeamais MOTSCHULSKY) CON POLVOS DE EPAZOTE (Dysphania ambrosioides (L.) MOSYAKIN & CLEMANTS) EN DIFERENTES GENOTIPOS DE MAÍZ

2020 ◽  
Vol 43 (3) ◽  
pp. 307
Author(s):  
Ma. Alma Rangel-Fajardo ◽  
J. Ismael Tucuch-Haas ◽  
Noel O. Gómez-Montiel ◽  
Dianelly de la C. Basto-Barbudo ◽  
Johnny A. Burgos-Díaz
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Sitophilus Zeamais

Durante el manejo postcosecha del maíz (Zea mays L.) se presentan pérdidas importantes por el ataque de plagas de almacén, particularmente por gorgojo (Sitophilus zeamais Motschulsky). El objetivo del presente estudio fue evaluar la efectividad del epazote (Dysphania ambrosioides) para controlar los daños por gorgojo en maíz. Semillas de 11 genotipos de maíz, nueve experimentales y dos híbridos comerciales, todos con humedad de 13 % y sin daño físico que indicara la presencia de insectos, fueron sometidos a tratamientos con polvo de epazote en cuatro concentraciones (0, 5, 7 y 10 g de epazote kg-1 de semilla) para controlar gorgojo. Se utilizó un diseño completamente al azar con arreglo factorial y tres repeticiones. La unidad experimental consistió en una caja de plástico acondicionada donde se colocaron 100 semillas, previamente pesadas, junto con 50 gorgojos jóvenes y la dosis correspondiente de polvo de epazote. Las variables registradas fueron pérdida de peso, granos dañados y sobrevivencia de insectos, todos expresados en porcentaje. Hubo diferencias entre genotipos de maíz solamente para pérdida de peso (P ≤ 0.05); todos los genotipos de maíz registraron pérdidas; sin embargo, el híbrido CLTHW14001 fue el menos afectado con 3.5 % de pérdida de peso. Las dosis de 7 y 10 g de epazote kg-1 de semilla fueron sobresalientes en las variables pérdida de peso, granos dañados y sobrevivencia de insectos, con 3.4, 12.2 y 3.5 % en promedio, respectivamente. El híbrido CLTHW14001 mostró el menor daño con la dosis de 7 g de epazote kg-1 de semilla con 0.94 % de pérdida de peso. El uso de polvo de epazote para el control de gorgojo es efectivo en concentraciones desde 7 g kg-1 de semilla. El genotipo de maíz influye en la efectividad del tratamiento.

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