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2012-12-13 12:21:21

A new study by biologists at Mercyhurst University focuses on the influence of climate change, particularly warmer winters, on the survival and potential fecundity of cold-blooded animals. Cold blooded animals, or ectotherms, do not have an internal mechanism for regulating body temperature. Instead, they rely on solar energy captured by the environment. The purpose of the Mercyhurst study, a collaboration of Michael Elnitsky, Ph.D., assistant professor of biology; and students Drew...

2011-11-01 15:21:55

Aphid researchers from Chinese Academy of Sciences found one new species, Aleurodaphis sinojackiae Qiao & Jiang, 2011 from Jiangsu and Zhejiang Provinces, China. It forms leaf galls on Jack trees (Sinojackia xylocarpa) and is one of two known gall makers in the plant lice Aleurodaphis (Hemiptera, Aphididae, Hormaphidinae). The study was published in the open access journal ZooKeys. Aleurodaphis was established in 1917 by van der Goot and has eight known species in the world, restricted...

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2009-02-25 18:20:00

According to findings that have been published in Proceedings of the Royal Society B, an aphid species has "soldiers" who often die in the process of repairing damage to galls, the homes that aphids force their plant to grow.The aphids gather around a hole in the gall and squeeze out a fluid comprising two-thirds of their body size, using their legs to mix it and form a "scab".The presence of the aphids after the scab formed is the only possible way for full recovery of the plant tissue to...

2008-10-13 15:00:16

By DANA WILDE "What's this?" my wife said. She held up a shiny, speckled red ball about the size of an acorn. Me being the amateur naturalist and science fictionist in the house, and everybody else being merely curious, she expected I'd have an answer, or at least a weird guess. "I have no idea," I said. "Where did you get it?" "Jack found it in the grass by the Shed." She handed it to me. It was smooth and looked like some kind of fruit or nut, although it had no apparent stem end. I...


Latest Gall Reference Libraries

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2011-04-14 14:17:06

Agrobacterium tumefaciens is the causal agent of crown gall disease (the formation of tumours) in over 140 species of dicot. It is rod shaped. Symptoms are caused by the insertion of a small segment of DNA into the plant cell. It is an alphaproteobacterium of the family Rhizobiaceae which includes the nitrogen fixing legume symbionts. They are pathogenic and provide no benefit to the plant. It also affects a wide variety of plants. In an economical sense it affects walnuts, grape vines,...

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Word of the Day
mallemaroking
  • Nautical, the visiting and carousing of sailors in the Greenland ships.
This word is apparently from a confusion of two similar Dutch words: 'mallemerok,' a foolish woman, and 'mallemok,' a name for some persons among the crew of a whaling vessel.