词汇 | larva |
释义 | larva noun[ C ] uk /ˈlɑː.və/ us /ˈlɑːr.və/plurallarvaeuk /-viː/us a form of an insect or an animal such as a frog that has left its egg but has not yet developed into a pupa or adult insect or animal幼体,幼虫 Compare pupa The development & parts of insects antenna caterpillar chrysalis cocoon eclose eclosion feeler grub larval maggot nit nymph proboscis pupa royal jelly silkworm tegmen thoracic venation worm Related wordlarval If it hears insects moving inside the tree, it gnaws the tree with its big teeth until it gets to the larvae. It can hear insect larvae move four meters inside the tree! The aye-aye eats insect larvae. larva | American Dictionarylarva noun[ C ] us/ˈlɑr·və/plurallarvaeus/ˈlɑr·vi/ a young insect that has left its egg but has not yet developed wings, or the young of some animals Examples of larvalarva A single leaf was placed in each pot containing larvae and this was replaced every second day. One day before each new infestation the beans were carefully mixed to achieve a random distribution of host larvae. At the same time, third instar larvae were transferred to the upper surface of the first fully opened mature leaf of individual plants. It was defined as the period of time until the first eggs with fully-developed first instar larvae were visible in different female age classes. To obtain infested fruits, a third instar larva was placed into a small plastic dish (diameter 17 mm, height 11 mm). Cattle were infested artificially with 2 x 10000 larvae and the engorging adult females counted. Possibly emerging young larvae still sustained some nutritive reserves from the egg stage. Using these methods, the resistance status of parasite populations can be analysed by testing representative numbers of individual nematode larvae or adults. One larva was observed to pass through six larval stages. The above study suggested that dipterous larvae might be good test insects since their availability was fairly steady throughout the year. Mistakes are rare, since only in one case, were two wasp larvae (both first stage) found in a single ant. Larval performance was studied by following larvae enclosed in cages from newly moulted second instars to third instars in the field. Many of these doomed larvae had crawled onto the sides of the vial rather than remaining on the food. Captive agoutis and squirrels readily ate larvae when presented without the surrounding endocarp, and preferred larvae to seeds. In such broods larvae are found whose development is arrested over a relatively long period. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Collocations withlarvalarvaThese are words often used in combination with larva. Click on a collocation to see more examples of it. aquatic larva As these species lack aquatic larvae, they may show habitat relationships that differ from aquatic-breeding species. beetle larva If a fully developed beetlelarva had been found in at least one of the eggs the egg clutch was categorized as 'survived' (1). developing larva When they hatch, the snow crabs are in the zoeal stage, meaning that they are developinglarva that can swim on their own. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. See all collocations with larva |
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