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B. C. Das, A. F. G. Dixon
Many studies indicate that there is a density of aphids below which ladybirds are unlikely to lay eggs. This is adaptive as theory indicates that a certain minimum population density of aphids is required if hatchling larvae are to survive. The responses...
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Shanshan Jiang, Hui Li, Hainuo Wang, Xiaoxia Liu and Kongming Wu
Wheat aphids are major pests of wheat and a significant threat to global food security. Eupeodes corollae Fabricius is one of the dominant species of wheat field hoverflies, but its ability and role in wheat aphid control lack systematic research. This s...
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Elzbieta Wojciechowicz-Zytko and Edyta Wilk
The influence of different semi-natural surroundings adjacent to apple orchards on the occurrence of predatory syrphids and biological control of Aphis pomi Deg. and Dysaphis plantaginea Pass. was compared. Two methods of catching hoverflies were used: y...
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Zuzana ?típková, Pavel Kindlmann
Pág. 53 - 57
By monitoring of 50 aphid colonies in 2017 and another 50 colonies in 2018 twice a week, we looked at how the aphid dynamics wasaffected by their natural enemies. This will help us to see, how much the presence of natural enemies shortens the duration of...
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Joseph Walls III, Edwin Rajotte and Cristina Rosa
Barley yellow dwarf (BYD) has been described as the most devastating cereal grain disease worldwide causing between 11% and 33% yield loss in wheat fields. There has been little focus on management of the disease in the literature over the past twenty ye...
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Joseph Walls III, Edwin Rajotte and Cristina Rosa
Barley yellow dwarf (BYD) has been described as the most devastating cereal grain disease worldwide causing between 11% and 33% yield loss in wheat fields. There has been little focus on management of the disease in the literature over the past twenty ye...
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Ahmad Pervez, Meena Yadav
Pág. 102 - 108
We review the foraging behaviour of predaceous ladybirds in the light of current knowledge. Ladybirds should forage optimally to maximise their resources; however, they are limited ? among other things ? by their poor visual acuity. Ladybird foraging beh...
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G. APABLAZA, J. APABLAZA, P. REYES, E. MOYA
Pág. 175 - 186
Viral diseases and insect vectors from weeds -growing adjacent to fields of tomato, pepper, melon, watermelon and squash - were determined in theVth and Metropolitan regions of Chile. Two hundred and eleven weed samples showing virussymptoms were analyze...
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Spiridon Mantzoukas and Ioannis Lagogiannis
Aphids are among the most harmful crop pests, damaging plants by sucking sap or by transmitting pathogenic viruses. Plant infestation by aphids depends on their population growth. Entomopathogenic fungi are essential participants of terrestrial and aquat...
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Ahmad Pervez, Rajesh Kumar
Pág. 130 - 134
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Ahmad Pervez, Rajesh Kumar
Pág. 130 - 134
We investigated prey preference of adult male and female Propylea dissecta (Mulsant) when fed on the aphids, Aphis craccivora and Lipaphis erysimi, which sequester toxic allelochemicals from their host plants. Both the male and female adults of P. dissec...
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Thomas Thieme, Bernd Truberg, Antony F.G. Dixon
The objective of this study was first to determine whether the chemical defence of lupin is more effective against the generalist aphids that occur on lupins than the host specific, M. albifrons. Secondly, to determine whether the host specific aphid sho...
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Thomas Thieme, Bernd Truberg, Antony F.G. Dixon
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Olga M.C.C. Ameixa, Radka Dvoráková, Jan ?ipo?, Pavel Kindlmann
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Tony Prüfer, Thomas Thieme, Fred W. Tjallingii
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Jun-he Liu, Ming-Fu Yu, Wen-Yi Cui, Li Song, Zi-Hua Zhao, Abid Ali
Effect of different landscape patterns on insect distribution and diversity was determined by studying wheat fields in complex and simple agricultural landscapes. We studied the influence of simple and complex agricultural landscapes on wheat aphids and ...
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Jun-he Liu, Ming-Fu Yu, Wen-Yi Cui, Li Song, Zi-Hua Zhao, Abid Ali
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Diab Al Hassan, Nicolas Parisey, Françoise Burel, Manuel Plantegenest, Pavel Kindlmann, Alain Butet
We investigated, over the course of two years, the importance of landscape context on the abundance of aphids and their natural carabid enemies, which may help to develop effective strategies for reduction of aphid outbreaks in agricultural landsca...
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Diab Al Hassan, Nicolas Parisey, Françoise Burel, Manuel Plantegenest, Pavel Kindlmann, Alain Butet
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Isabel Bertolaccini, Etelvina Núñez-Pérez, Emilio Jorge Tizado
Pág. 233 - 242
The study was done during the spring, summer and fall of 1998 and 1999. Samples were taken at random from legume crops and spontaneous plants adjacent to them in the province of León (Spain). Observations were made on the following crops: Medicago sativa...
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