Colony growth and dispersal in the ant-tended aphid, Aphis craccivora Koch, and the non-ant-tended aphid, Acyrthosiphon pisum Harris, under the absence of predators and ants

Predators of the Alfalfa Aphids Acyrthosiphon pisum (Harris), Aphis craccivora Koch,and Therioaphis trifolii (Monell) (Hemiptera: Aphidoidea) as Determined by the Serological TechniqueAbstract. The serology is an immunological technique based on antigen/antibody reactions in where its main advantages are high sensitivity and specificity that allows the biological recognition at the molecular level. This study evaluates the use of serology technique to determine the predators of the alfalfa aphids Acyrthosiphon pisum (Harris), Aphis craccivora Koch,and Therioaphis trifolii (Monell)(Hemiptera: Aphidoidea). The aphid samplings to obtain the antibodies and their possible predators to be used as antigens were carried out in the alfalfa fields of the Embrapa Pecuária Sudeste Unit, São Carlos, SP. In the period from August 2011 to July 2012. A total of 2,161 arthropod predators, including insects and spiders, were tested. The antibodies obtained for the aphid A. craccivora, A. pisum, and T. trifolii showed partial identity nevertheless still allowed to recognize the predators of alfalfa aphids. Among the insects, syrphids and chrysopids presented the highest percentage of positive results in the serological tests. The species A. craccivora was the most preyed aphid.Determinação de Predadores dos Pulgões da Alfafa Acyrthosiphon pisum (Harris), Aphis craccivora Koch e Therioaphis trifolii (Monell)(Hemiptera: Aphidoidea) por meio da Técnica SerológicaResumo. A serologia é uma técnica imunológica baseada em reações antígeno/anticorpo, em que suas principais vantagens são a alta sensibilidade e especificidade que permitem o reconhecimento biológico em nível molecular. Este trabalho avalia o uso da técnica serológica para determinar os predadores dos pulgões da alfafa, Acyrthosiphon pisum (Harris), Aphis craccivora Koch e Therioaphis trifolii (Monell) (Hemiptera: Aphidoidea). As coletas dos pulgões para a obtenção dos anticorpos e de seus possíveis predadores para serem utilizados como antígenos foram realizadas nos campos de alfafa da Unidade da Embrapa Pecuária Sudeste, São Carlos, SP. no período de agosto de 2011 a julho de 2012. Foram testados 2.161 artrópodes predadores, incluindo insetos e aranhas. Os anticorpos obtidos para os pulgões A. craccivora, A. pisum, e T. trifolii mostraram identidade parcial mas, ainda assim, permitiu reconhecer os predadores dos pulgões da alfafa. Dentre os insetos, sirfídeos e crisopídeos foram os que apresentaram as maiores porcentagens de resultados positivos nos testes serológicos. A. craccivora foi o afídeo mais consumido pelos predadores.

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Potency of Three Botanical Oils Against the Aphis Craccivora Koch (Homoptera: Aphididae) Nymphs Under Laboratory Conditions

SAARC Journal of Agriculture ◽

10.3329/sja.v19i1.54785 ◽

2021 ◽

Vol 19 (1) ◽

pp. 139-154

Author(s):

MA Hossain ◽

MS Yasmin ◽

MAA Bachchu ◽

MA Alim

Keyword(s):

Treatment Time ◽

Probit Analysis ◽

Aphis Craccivora ◽

Tween 20 ◽

Laboratory Conditions ◽

Significant Difference ◽

Aphis Craccivora Koch ◽

Insect Mortality ◽

Oil Repellent ◽

Swietenia Mahagoni

Botanicals are promising and attractive alternatives for pest management. In the present study, three botanical oils namely neem (Azadirachta indica), karanja (Pongamia pinnata) and mehogony (Swietenia mahagoni) were tested against the nymphs of Aphis craccivora Koch to evaluate the toxic and repellent effects under laboratory conditions (25 ± 5oC, 65-75% RH). Four concentrations (0.5, 1.0, 1.5, and 2.0%) along with control were maintained with distilled water and tween-20 was used as emulsifier. Leaf dipped method were used for insect bioassay. Insect mortality was recorded at 24, 48 and 72 hours after intervals while repellency was carried out at 2 hours after intervals upto 10th hours and the collected data were analyzed through MSTAT-C program. Results indicated that all the tested oils had toxic and repellent effects against the A. craccivora nymphs. Among the tested botanical oils, no significant difference was observed in terms of mortality over treatment time. But significant difference was noticed over level of concentrations exerted by the botanical oils. The average highest mortality (28.62%) was recorded by the application of mehogony oil whereas neem oil showed the lowest mortality (27.21%) against the A. craccivora and the mortality was directly proportional to the level of concentrations and hour after treatment (HAT). Probit analysis showed the lowest LD50 values of mehogony oil which revealed the highest toxic effect against the nymph of bean aphid. The highest repellent effect (77.33%) was found in mehogony oil (repellent class IV) among all the botanical oils applied. On the contrary, neem (57.33%) and karanja (55.00%) oils belonged to the same repellent class that is repellent class II. Although all the tested botanical oils evaluated showed toxic and repellent effects but mehogony oil performed as the best potent oil against the nymphs. We therefore suggested using the mehogony oil for the management of bean aphid. SAARC J. Agric., 19(1): 139-154 (2021)

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Using of Entomopathogenic Fungi against Fabae bean Aphid, Aphis craccivora (Koch)

International Journal of ChemTech Research ◽

10.20902/ijctr.2019.120125 ◽

2019 ◽

Vol 12 (01) ◽

pp. 216-222

Author(s):

I. E. Abdel-Rahman ◽

F. H. Faragalla

Keyword(s):

Entomopathogenic Fungi ◽

Aphis Craccivora ◽

Aphis Craccivora Koch

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Damage assessment and biorational management of bean aphid, Aphis craccivora Koch

Journal of the Bangladesh Agricultural University ◽

10.5455/jbau.9740 ◽

2020 ◽

pp. 1

Author(s):

Sonia Sultana ◽

Mohammad Uddin ◽

Khandakar Islam

Keyword(s):

Damage Assessment ◽

Aphis Craccivora ◽

Aphis Craccivora Koch

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Reproductive performance of four aphidophagous ladybirds on cowpea aphid, Aphis craccivora Koch

Journal of Applied Entomology ◽

10.1111/j.1439-0418.2005.00953.x ◽

2005 ◽

Vol 129 (4) ◽

pp. 217-220 ◽

Cited By ~ 15

Author(s):

G. Mishra ◽

S. Srivastava ◽

A. K. Gupta ◽

S. K. Singh

Keyword(s):

Reproductive Performance ◽

Aphis Craccivora ◽

Cowpea Aphid ◽

Aphis Craccivora Koch

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Effects of intersowing with beans on the spread of groundnut rosette virus by Aphis craccivora Koch (Hemiptera, Aphididae) in Malawi

Bulletin of Entomological Research ◽

10.1017/s0007485300006726 ◽

1976 ◽

Vol 66 (2) ◽

pp. 331-333 ◽

Cited By ~ 20

Author(s):

J. A. K. Farrell

Keyword(s):

Phaseolus Vulgaris ◽

Arachis Hypogaea ◽

Virus Disease ◽

High Density ◽

Aphis Craccivora ◽

Plant Populations ◽

Bean Plants ◽

Aphis Craccivora Koch ◽

Field Beans

AbstractIn two trials, at Chitedze, Malawi, in 1966–1967, the spread of rosette virus disease in groundnuts (Arachis hypogaea) intersown with field beans (Phaseolus vulgaris) was less than the spread in groundnut monocultures comprising plant populations equivalent to the number of groundnut plants and to the total number of plants in the intersown crop. In one trial, numbers of early rosette transmissions were related to numbers of alate Aphis craccivora Koch, the vector of the virus, found on groundnut plants. Immigrant alate A. craccivora settling on the intersown crop were trapped by the hooked epidermal hairs of the bean plants and the observed reduction of rosette infection in the intersown crop was attributed to this effect. Inter-sowing with beans is considered less effective than early-sown, high-density monoculture as a method of reducing groundnut rosette infections and yields of groundnuts from inter-sown crops may be lower than those obtained from high-density monoculture.

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