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Betrayal Of The Aphids
2014-06-03 14:58:11

By Iqbal Pittalwala, University of California - Riverside Aphids are devastating insect pests and cause great losses to agriculture worldwide. These sap-feeding plant pests harbor in their body cavity bacteria, which are essential for the aphids' fecundity and survival. Buchnera, the bacterium, benefits also because it cannot grow outside the aphid. This mutually beneficial relationship is sabotaged, however, by the bacterium which proceeds to betray the aphid, a research team led by...

2012-04-18 21:04:56

Aphids are pests that cause millions of pounds of damage to crops in the UK, but new research led by biologists at the University of York reveals potential new targets for aphid-specific insecticides. Because it lives exclusively on the sugary sap of plants, aphids´ diet is limited in nitrogenous essential amino acids. To solve this problem, the aphid must use a bacterial symbiont, Buchnera, that lives inside special insect cells and supplements the animal´s diet with the...

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2010-02-23 09:19:43

Aphids could be considered the "mosquitoes" of the plant world, depending on the "blood" of plants to survive. They live in symbiosis with bacteria that pass from one generation to the next, producing essential amino acids. Aphids with the same genotype can be wingless or winged. In different seasons, they develop as asexual females who produce offspring with identical genes through parthenogenesis. When temperatures drop, they can give birth to males who then fertilize the eggs laid by...

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2007-04-19 16:39:37

For pea aphids, the ability to go forth and multiply can depend on a single gene, according to new research. An overheated aphid with a mutation in that gene can't reproduce. The gene isn't even in the insect -- it's in tiny symbiotic bacteria housed inside special cells inside the aphid. "It's the first time a mutation in a symbiont has been shown to have a huge impact on host ecology," said Nancy A. Moran, Regents' Professor of ecology and evolutionary biology at The University of Arizona...


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2005-09-12 10:12:57

Aphids or greenfly, plant lice (superfamily Aphidoidea) are small plant-feeding insects (1 to 10 mm). Of the 4,000 species of known aphids (distributed in 10 families), around 250 are serious pests for agriculture and forestry as well as an annoyance for gardeners. Natural predators include ladybirds, hoverfly larvae and lacewings. Aphids have two compound eyes and two ocular tubercles made up of 3 lenses, each of which is located behind and above the compound eyes. They have 2 tarsal...

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Word of the Day
glogg
  • Scandinavian punch made of claret and aquavit with spices and raisins and orange peel and sugar.
This word comes from the Swedish 'glogg,' which is an alteration of 'glodgat,' mulled (wine).
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