英语词汇“eyespot”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

eyespot

/ˈʌɪspɒt

noun

1 Zoology A light-sensitive pigmented spot on the bodies of invertebrates such as flatworms, starfishes, and microscopic crustaceans, and also in some unicellular organisms.However, when the pigmented eyespot is absent, the light penetrates the body and the front-to - back contrast is reduced....

They do not have image-forming eyes, but many species have pigment cells and photoreceptors concentrated into eyespots.
However, pigmented eyespots are visible in wild-type larvae and late-stage embryos.

2A rounded eye-like marking on an animal, especially on the wing of a butterfly or moth.The bodies are light and ill-defended, except for the armored face, which is designed to draw attacks to it, like the eyespots on butterfly wings....

The beautiful eyespots on butterfly wings are thought to rely on the principles described above, although involving more morphogens.
The colorful eyespots on butterfly wings may be patterned by a mechanism similar to that used to organize the proximo-distal axis of the insect leg.

3 [mass noun] A fungal disease of cereals and other cultivated grasses, characterized by yellowish oval spots on the leaves and stems.

The fungus is typically Pseudocercosporella herpotrichoides, subdivision Deuteromycotina.

The percentage of stems affected by damaging lesions of eyespot at 22.1pc was the highest on record....

The pathogen survives on corn debris, so reduced tillage and continuous corn create a high-risk environment for development of eyespot, especially if there is heavy residue and a history of it in that location.
Where eyespot is over threshold the preferred fungicide would be cyprodinil although Punch and Landmark both have some activity against eyespot and can give useful control.

单词	eyespot
释义	eyespot /ˈʌɪspɒt / noun 1 Zoology A light-sensitive pigmented spot on the bodies of invertebrates such as flatworms, starfishes, and microscopic crustaceans, and also in some unicellular organisms.However, when the pigmented eyespot is absent, the light penetrates the body and the front-to - back contrast is reduced.... They do not have image-forming eyes, but many species have pigment cells and photoreceptors concentrated into eyespots. However, pigmented eyespots are visible in wild-type larvae and late-stage embryos. 2A rounded eye-like marking on an animal, especially on the wing of a butterfly or moth.The bodies are light and ill-defended, except for the armored face, which is designed to draw attacks to it, like the eyespots on butterfly wings.... The beautiful eyespots on butterfly wings are thought to rely on the principles described above, although involving more morphogens. The colorful eyespots on butterfly wings may be patterned by a mechanism similar to that used to organize the proximo-distal axis of the insect leg. 3 [mass noun] A fungal disease of cereals and other cultivated grasses, characterized by yellowish oval spots on the leaves and stems. The fungus is typically Pseudocercosporella herpotrichoides, subdivision Deuteromycotina. The percentage of stems affected by damaging lesions of eyespot at 22.1pc was the highest on record.... The pathogen survives on corn debris, so reduced tillage and continuous corn create a high-risk environment for development of eyespot, especially if there is heavy residue and a history of it in that location. Where eyespot is over threshold the preferred fungicide would be cyprodinil although Punch and Landmark both have some activity against eyespot and can give useful control.
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