| 词汇 | larvae |
| 释义 | larvae plural oflarva Examples of larvaelarvae A single leaf was placed in each pot containing larvae and this was replaced every second day. The window opens when aphids are abundant enough for sufficient survival of larvae developing from eggs. 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. Attention has focused almost exclusively on adult beetles, probably because their larvae are conspicuously missing from tropical foliage. An effect of larval food-plant on adult life-span was found with greater longevity in females that had as larvae consumed exclusively lodgepole pine foliage. 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. Of these larvae 11 hatched after stimulation and the remainder died. Large quantities of each species should be collected, and also larvae in all their 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. 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. |
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