Aphids with attitude: an army of real-life adolescent clones.

Science News;  July 6, 2002 ;     700+ words ......heroes, most of the world's 4,000 or so aphid species aren't by any stretch of the definition...high throughput, low drama. Yet a few aphid species turn out to be more like killer bees...amounts of essential amino acids. Most aphid species reproduce both sexually and asexually...

Scientists close in on new aphid threat to soybeans.

M2 Presswire;  May 2, 2002 ;     356 words ......biology, impact and migration of a new aphid species pestering soybean crops in Illinois...there was speculation it belonged to aphid species that infest cotton and melon crops...pest's body that can differentiate one aphid species from another. Stoetzel works at ARS...

The effect of the quality and size of host aphid species on the biological...

European Journal of Entomology;  July 1, 2008 ;     700+ words ......Twenty second-instar nymphs of each aphid species were exposed to parasitism for one...one of the dominant species attacking aphid species in South America (Stary et al., 2007...MATERIAL AND METHODS Aphid rearing The aphid species evaluated as hosts for A. colemani...

Instar preference and parasitization of Aphis gossypii and Myzus persicae...

European Journal of Entomology;  January 1, 2004 ;     700+ words ......parasitized nymphs of all instars of both aphid species, but it showed a preference for 1st...instar of M persicae. Nymphs of both aphid species parasitized in the 1st and 2nd instars...mainly concerns preference for different aphid species (Messing & Rabasse, 1995; van Steenis...

The influence of temperature and food supply on the development of Adalia...

European Journal of Entomology;  January 1, 2004 ;     700+ words ......investigated the effect of different aphid species on the development of A. bipunctata...link between the palatability of the aphid species and the secondary plant metabolites...highly palatable and host-specialised aphid species. This could maintain a permanent food...

Prey preference and biomass consumption of Macrolophus pygmaeus...

European Journal of Entomology;  January 1, 2007 ;     700+ words ......pygmaeus (Rambur) when offered two aphid species, Myzus persicae (Sulzer) and Macrosiphum...the biological control of these two aphid species is discussed. (ProQuest-CSA LLC...M. pygmaeus choose between the two aphid species; (2) Is the preference of M. pygmaeus...

Migratory flight and pre-diapause feeding of Coccinella septempunctata...

European Journal of Entomology;  January 1, 2005 ;     700+ words ......other crops, where they feed both on 15 aphid species (e.g., Aphis gossypii Glov. on melon...lower elevations where they feed on 8 aphid species (e.g. broom aphid) and pollens of several...was reported by Hodek (1996). Some aphid species (e.g., Aphis spiraephaga F.P.M., Schizaphis...

The parasitoid Praon volucre (Hymenoptera: Braconidae: Aphidiinae) as a...

European Journal of Entomology;  July 1, 2008 ;     700+ words ......parasitoid was compared on these two aphid species. Twenty nymphs of the 2nd instar were...levels were recorded for both host aphid species, but the percentage parasitism of M...parasitoid was compared on these two aphid species. MATERIAL AND METHODS Insect rearing...

Effect of summer flush leaves of the Daimyo oak, Quercus dentata, on...

European Journal of Entomology;  January 1, 2004 ;     700+ words ......alternation occurs in only about 10% of aphid species (Eastop, 1973), and many of the other...the favourable conditions for some aphid species (Kennedy, 1958; Forrest, 1971; Koyama...unfavourable host plant quality. Several aphid species are known to aestivate in summer. The...

The effects of six species of aphids on some life history parameters of...

European Journal of Entomology;  January 1, 2005 ;     700+ words ...Key words. Coccinellidae, essential prey, alternative prey, larval...Coleoptera: Coccinellidae). All aphid species studied (Acyrthosiphon pisum...observations checked whether those aphid species found to be suitable for...on the six experimental aphid species. Thirty ...

Effects of larval diet on female reproductive output of the European...

European Journal of Entomology;  July 1, 2008 ;     700+ words ......periods of aphid scarcity. A reduction in essential prey density and the acceptance of conspecific...Majerus, 1994; Hodek, 1973, 1996). Essential prey supports immature growth, development...prey merely maintains survival until essential prey items are located. Many principally...

Honeydew production and honeydew sugar composition of polyphagous black...

European Journal of Entomology;  January 1, 2005 ;     700+ words ......composition vary considerably between aphid species (e.g. Hendrix et al., 1992; Vlkl et...but may also vary within a particular aphid species in an age-specific pattern (Hertel...amino acid pattern of the polyphagous aphid species Aphis fabae on different host plants...

Aphids destroy lettuce crops

The Press;  May 10, 2002 ;     273 words ......devastating" aphid. Christchurch people are being urged not to take lettuces out of Canterbury to curb the spread of the new aphid species. Over the last few weeks the aphid has forced Marshland grower John Watson to plough in lettuce crops worth about $50,000...

Syrphid aphidophagous predators in a food-web context

European Journal of Entomology;  January 1, 2005 ;     700+ words ......influences on the specificity of hoverfly larvae (Diptera: Syrphidae) to particular aphids are outlined. There are four main ones: aphid species, host plant, parasitoid impact and the presence of ants. Studies in the literature are used to illustrate the effect of these...

The biological characteristics and distribution of the greenbug,...

European Journal of Entomology;  January 1, 2004 ;     700+ words ......oats in South America. At low latitudes, populations of both aphid species were found only infesting wild Sorghum halepensis (L). INTRODUCTION...recent results published by Anstead et al. (2002). Since both aphid species are important pests of cereals and virus vectors (Fereres...