| 词汇 | example_english_mite |
| 释义 | Examples of miteThese 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. Rats, including the ears, were examined for ectoparasites (fleas, lice, mites and ticks) and collected by fine-toothcombing. Secondly, ballooning spider mites are strongly polyphagous and widely distributed in many types of habitats. The volatile blend induced in ginkgo by jasmonic acid was slightly attractive to predatory mites. The species composition and the numbers of individuals and species of oribatid mites in the litter were affected by the size of the ferns. However, the low parasite intensity in this species makes the method unsuitable for growth of mites intended for the preparation of larger batches of antigen. The high frequency of application of insecticides has often resulted in the emergence of insects and mites resistant to the active ingredient. In spider mites, the ancestral state for the use of silk seems to have been to protect egg masses. Feeding of the mites in this zone apparently causes physical damage so that as newly formed tissues expand, the surface becomes necrotic and suberized. There is also a discussion of the possible mutualisms between mites and their animal or plant habitats which is most enlightening. The mites congregate in numbers, principally in the vicinity of the bulb neck. The marks are made by those mites which congregate at these points almost immediately upon the bulbs first being subjected to artificial heat. Down these crevices the mites gradually work, almost always in narrow vertical strips, and their activities produce the quite definite streaks upon the scale walls. The dissection of females bearing more than 10 mites disclosed the absence of the fat-body and a pronounced under-development or other abnormalities of the ovary. There are theories not involving infection, including the theory invoking allergy to synthetic detergent, that suggesting antigenicity to mites, and that suggesting allergy to mercury. Mites were always transferred from aging plants to the younger ones by placing old leaves infested with mites on 7to 10-day-old seedlings. All predatory mites found were collected and stored in 70% ethanol for subsequent identification. Thus, we can as yet draw no conclusion as to the evolution of ballooning by mites. Finally, no bloodmeals occurred on a duck skin membrane, although a few adult mites did feed on a nude mouse skin membrane. Unfortunately, it is extremely difficult to free poultry houses of mites once an infestation has occurred. The proteins might also be necessary to regulate the actions of proteases secreted by the mites. The frequency with which voles were infested by mites was higher in baited blocks. Essentially, therefore, kukwezera was a planned strategy used by far mers who expected high crop losses from ter mites in that particular season. Admittedly throughout the year the majority of mites are ensconced within the bulbs in positions inaccessible to either spray fluid or fumigant. Even jasmonic acid-treated ginkgo leaves that possess a strong direct defence were slightly attractive to predatory mites. The pooled data with the total number of predatory mites are also depicted. Unlike moths and spider mites, the rate and the intensity of many of the perturbations are not known. One possibility lies in the secondary characteristics that ensure that spider mites are supremely adapted to managing the risk associated with ballooning dispersal. Given these conditions the mites bred freely for some considerable time. In comparatively vigorous bulbs and particularly in those of symmetrical form this destruction of mites is very complete. A different picture is presented, however, when there are 10-20 or more mites on one individual. Low soil fertility and the incidence of ter mites may have further reduced maize yields. Second, the aggressiveness of juvenile and adult predatory mites against thrips larvae was measured. The cut stems were then placed in a perspex cylinder, with a ventilated lid, to contain the mites on the cut stems. We also measured the prevalence of ectoparasitic mites, enabling us to examine relationships between infections with different parasites. A colony of mites was maintained in vitro for 7 generations. Except in situations where they expected high losses from ter mites, therefore, far mers preferred to use 'adaptive' management strategies like salvage. The food of these mites is unknown, but most likely they feed at least in part on nematodes. The economical risk is increased by the arrhenotokous mode of reproduction of spider mites, because a single egg may start a strain. Due to their life styles these predators utilize spider mites in different manners. In each locality, at least 100 individual mites were collected. Immediately before application to experimental units, the substrate containing the mites was spread onto a white, butchers' tray. In all experiments, the application rate for mites was calculated as the number of mites related to the surface area of the experimental unit. Starved mites tended to move more rapidly with increased negative geotaxis and hence greater dispersal. Maintenance of mites and plants in this test were conducted as described above. To evaluate this, two different test plant species were tested with the same predatory mites on the same day. Therefore, it is not really necessary for ginkgo to induce synomones for the attraction of predatory mites. Once they have emerged, the mites migrate to colonize new buds. As with ballooning in the spiders and mites, there is clearly scope for more useful research into lepidopteran ballooning. Except in dry years, ter mites were not usually visible before far mers had started the second weeding. We found different frequencies of voles infested with mites in the two treatments. Repelled and repulsed: twospotted spider mites react to agrochemicals. Ants, mites and rove beetles are not considered as members of the guild described here and are not discussed further in this paper. A comparative survey of the hydrolytic enzymes of ectoparasitic and free-living mites. Furthermore, more males harboured mites than females. In addition, the culture of predatory mites was enhanced with mites from commercial sources on a regular basis to prevent any inbreeding effects altering the responses of the predatory mites. No differences in attractiveness of the infested plant leaves were found for predatory mites reared on spider mites on the different test plants or on lima bean. After five mites had made a choice in both olfactometers, the order of initial choice for the predatory mites for one out of two olfactometers was changed. The concealed nature of the mites' usual habitat precludes prolonged observation under strictly natural conditions, and a technique had to be evolved which permitted of observations at will. Such far mers had decided, in advance, that the cost of banking (high crop losses from ter mites) exceeded the cost of not banking (lower yields). The flowers of the third group were unbagged and exposed to natural levels of pollination and nectar removal by hummingbirds and flower mites potentially brought b y hummingbird bills. However, only the density of oribatid mites in the litter decreased with increasing height of the fern, and the horizontal distance between the ferns did not affect the species composition. Revision of the macronyssid and laelapid mites of bats: outline of classification with descriptions of new genera and new type species. In the other glass jar the same amount of plant leaves infested with spider mites for at least three days and at most 14 days was placed. Varying the time for introduction of these biological agents could provide some indication of the pest life stage most susceptible to predation by mites and parasitism by nematodes. Measuring the strand length for spider mites from a suspended ballooning position (fig. 1a) would be relatively easy, although little work in this area has been published. To unravel the evolutionary history of ballooning, the catalogue data were superimposed onto four phylogenies; two for the spiders and one each for the spider mites and moth larvae. However, indirect defence against spider mites has not been investigated for these plant species yet, although for some of them indirect defence against other herbivore species has been documented. Immediately the foliage actually withers, the mites retire once more within the necks of the bulbs, where breeding continues on the upper portions of the fleshy scales. However, the broad range of antiparasite activity of ivermectin, including against mites and lice suggests possible wider uses and this is discussed in the penultimate chapter. The mean number of mites on the whole leaf was estimated by multiplying the mean count for three lobes by the number of lobes of each leaf. As the foliage matures and commences to flag, a more or less solid mat is formed, when distribution of the mites over a whole bed becomes an easy matter. We hypothesize that heavy mortality rates during the first life-cycle correspond to selective pressure : only the mites which fed and survived in vitro were able to reproduce. Of these six clusters, 4 had predicted signal peptides suggesting that they could be secreted by the mites and therefore be important in the pathogenesis of the disease. The comminution and excretion by the fragmenters may result in the succession of microbial communities (bacteria and fungi) and sequentially affect the population dynamic of the mites and collembolans. The distribution of insects, spiders and mites in the air. Phoretic mites encounter much less risk compared to ballooning spider mites because the relationship with the host has normally evolved over a long period of time. At each occasion, five adult mites from each species and 2.37 104 nematodes were introduced to the appropriate containers with one set of containers left blank as a control. One theory is that during the spring and autumn, spiders balloon only short distances probably searching for overwintering sites or food, much like spider mites and moths. The mites, except sometimes in the immediate vicinity of the bulb neck, invariably work in longitudinal strips between the scales and not round the individual scale. Furthermore, the effect of two different rearing histories is investigated, to assess whether experience with the volatiles from the spider-miteinfested test plant has an effect on the predatory mite's response. As was true in medicine, early attempts to induce resistance in agriculture relied upon introducing mild, economically benign insects and mites to induce resistance against economically important arthropod pests. Whilst the possibility of between-field distances is not dismissed, it needs to be demonstrated that mites can generate sufficient drag to be able to do this. Observations of extrafloral nectar feeding by predaceous and fungivorous mites. The evolutionary discussions take the form of an orderby-order treatment of the ballooning behaviours and the ecological phylogenetics of spiders, spider mites and moth larvae. Given this assumption, we can construct two arguments concerning ballooning dispersal in the mites. Five adult female mites, 3-5 days old, were transferred from the colony on kidney bean leaves and placed on each disc. A review of the origins of mites is followed swiftly by a fascinating discussion of their complex and sometimes confusing taxonomy. Nevertheless, the mites are not entirely inactive during this time. The mites are soft-bodied and of minute size, being only 1/120th of an inch in length. As the foliage dies back the mites wander along it and so cross to adjacent bulbs. Copepods and mites were considered as part of the community for all calculations. In its extreme form scabies can develop into a severe hyperkeratotic form where several thousands of mites can be found in the lesions. The classical method for the diagnosis of scabies is by microscopical demonstration of the mites and their eggs in skin scrapings. Fewer voles were infested with mites in control blocks in the second and third time-periods ; there was no difference in the first period. An interesting feature of the mite's pathogenicity is that virulence varies between and within geographical strains and can change rapidly within a few months. Will a population raised entirely in vitro, and therefore adapted to these conditions, be representative of poultry house mites ? 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. |
反思网英语在线翻译词典收录了377474条英语词汇在线翻译词条，基本涵盖了全部常用英语词汇的中英文双语翻译及用法，是英语学习的有利工具。