【赤眼蜂属】
赤眼蜂属（学名： Trichogramma）是膜翅目细腰亚目寄生蜂下目之下的小蜂总科赤眼蜂科的成员之一，其物种皆为polyphagous的微小拟寄生物，寄生于其牠昆虫的虫卵中。赤眼蜂属是赤眼蜂科约80个属的其中一个，在全世界包括超过200个物种。成虫大多小于1毫米，会产卵于宿主卵内，幼虫取食卵黄、化蛹并引发宿主死亡。成虫羽化后咬破寄主卵壳而出。
尽管现时在全世界有多种用于生物防治的物种，本属物种仍然是研究得最详尽的一类，有超过一千份相关的文献与本属物种相关，也是目前世上于生物防治中 最常用的物种。 Trichogramma spp. are unique in approaching the size limit of how small an insect can be, which would be determined by how few neurons they can fit in their central nervous systems, yet exhibiting a complex behavior to sustain their lives. These wasps have less than 10,000 neurons, which is 1/100th that of the next smallest insect.
==寄生性==
雌性成虫会通过化学和视觉信号来找到用来作为宿主的卵，比如卵大小和颜色。在她找到合适的卵后，其将会试图通过她的产卵器和对卵壳的敲击来判别这个卵是否之前已经被寄生过了。雌性赤眼蜂也会通过敲击来判别目标被寄生卵的大小和质量以决定赤眼蜂在被寄生卵内的产卵数量。一个雌性赤眼蜂一天最多可以在十个被寄生卵上产卵。
==辨识==
本属物种体型细小，构造上亦单一，使物种间的分辨颇困难Pang & Chen 1974。由于雌性相对来说体型较小，分类学家一般通过辨别雄性触角和生殖器的方式来辨别不同物种。
Charles V. Riley在1871年于北美第一种对赤眼蜂属下的物种进行描述。他将从总督蝶卵中爬出来的小蜂称为Trichogramma minutum。在生物分类学中，首个采集的标本是十分重要的，因为其被用作继续描述这个物种的基础，但是它丢失了。Riley后来在1879年又描述了第二种叫做Trichogramma pretiosum的赤眼蜂，但是其样本也丢了。为了更正这些错误，昆虫学家返回了Riley原本找到这两个物种的地方并收集了新的范本。现在这些范本被完好地存放在美国史密森尼学会。当前赤眼蜂属的物种超过两百种，但是在1960年的时候只有大概40种赤眼蜂被描述。
==赤眼蜂属物种体内的沃尔巴克氏体==
赤眼蜂属物种体内有沃尔巴克氏体（Wolbachia），是一种分布广泛的细菌，专门感染昆虫的内脏，特别是生殖系统的器官。这些沃尔巴克氏体在感染了昆虫后，会改变其宿主交配时的成功率Grenier。
Through a series of manipulations, Wolbachia-infected hosts transmit this intracellular bacterium to uninfected individuals. These manipulations include male killing (increasing ratio of infected females that can reproduce), feminization (males become fertile females), 单性生殖, and cytoplasmic incompatibility. Horizontal transfer of parthenogenesis-inducing Wolbachia, which has been observed in Trichogramma wasps, causes infected females to asexually produce fertile females and nonfunctional males. The effects of this include potential speciation of Trichogramma, if Wolbachia is maintained long enough for genetic divergence to occur and for a new species of asexual wasps to become reproductively isolated.
Transmission of the bacterium through horizontal transfer has been observed within the same species and among different species of Trichogramma, including T. kaykai, T. deion, T. pretiosum, and T. atopovirilia; however, limitations to transmission exist. In vitro successful horizontal transfer is uncommon within Trichogramma, which suggests that the density of Wolbachia must be relatively high inside of the hosts' ovaries. Cytoplasmic incompatibility of the host and bacterium can also be the source of this unsuccessful transfer in-vitro. These limitations in vitro suggest that in nature, horizontal transfer by parthenogenesis-inducing Wolbachia may be a difficult and rare phenomenon. However, when looking at the Wolbachia-host associations, the Trichogramma-Wolbachia form a monophyletic group based on several Wolbachia-specific genes, which may be explained by horizontal transfer of Wolbachia between different species. Therefore, although interspecific horizontal transfer of Wolbachia is limited in vitro, it is likely to occur quite frequently in nature and is not well understood yet.
The effects of Wolbachia in Trichogramma have  several evolutionary implications. Commonly, uninfected wasps are unable to breed with infected wasps. Many generations of reproductive isolation of these different groups may result in speciation. In addition, some hosts can evolve with a dependency on Wolbachia for core reproductive functions, such as 卵子生成, so that eventually an infection is a requirement for successful reproduction. Finally, Wolbachia can influence gender determination in its hosts so that more females are successfully born. This results in a reversal in 性选择, where females must compete for male mates, which has evolutionary implications as it exposes different phenotypes to natural selection.
== Biological control ==
Trichogramma spp. have been used for control of lepidopteran pests for many years. They can be considered the Drosophila of the parasitoid world, as they have been used for inundative releases and much understanding today comes from experiments with these wasps.
Entomologists in the early 1900s began to rear Trichogramma spp. for biological control. T. minutum is one of the most commonly found species in Europe and was first mass reared in 1926 on eggs of Sitotroga cerealella. T. minutum has been investigated as a method of biological control of the Choristoneura fumiferana, a major pest of spruce and fir forests.
Nine species of Trichogramma are produced commercially in insectaries around the world, with 30 countries releasing them. Trichogramma wasps are used for control on numerous crops and plants; these include cotton, sugarcane, vegetables, sugarbeets, orchards, and forests. Some of the pests  controlled include cotton bollworm (Helicoverpa armigera), codling moth (Cydia pomonella), lightbrown apple moth (Epiphyas postvittana), and European corn borer (Ostrinia nubilalis).
Trichogramma species vary in their host specificity. This can lead to nontarget hosts being parasitized. This, in turn, can cause problems by reducing the amount of parasitism of the target host, and depending on the rate of parasitism, nontarget effects could be significant on nontarget host populations. Research is being done on the use of Trichogramma wasps to control populations of spruce bud moth (Zeiraphera canadensis), which damages white spruce trees.
=== Species used ===
The most commonly used species for biological control are T. atopovirilia, T. brevicapillum, T. deion, T. exiguum, T. fuentesi, T. minutum, T. nubilale, T. platneri, T. pretiosum, and T. thalense.
==T. pretiosum==
T. pretiosum is the most widely distributed species in North America. It is a more generalized parasitoid, able to parasitise a range of different species. It has been the focus of many research studies and has been successfully reared on 18 genera of Lepidoptera. T. pretiosum was introduced into Australia in the 1970s as part of the Ord River Irrigation Area IPM scheme.
==T. carverae==
Trichogramma carverae is mainly used for light brown apple moth and codling moth control, and is predominately used in orchards. In Australia, T. carverae is used for biological control of light brown apple moth in vineyards. Though Australia has its own native Trichogramma species, not much work has been undertaken to use them commercially for biological control within Australia.
Light brown apple moth is common throughout Australia and is polyphagous on more than 80 native and introduced species. The larvae cause the most damage, especially to grape berries, as their feeding provides sites for bunch rot to occur. Losses in the crops can amount up to $2000/ha in one season. It is very predominant in areas such as the Yarra Valley. Insecticide use is not a choice method for most growers, who prefer a more natural means of controlling pests. As a result, Trichogramma wasps were considered a good candidate for biological control, even more so as the moth larvae are difficult to control with insecticide. Moreover, light brown apple moths are relatively vulnerable to egg parasitism, with their eggs being laid in masses of 20-50 on the upper surfaces of basal leaves in grapevines.
==部分物种==
以下译名参照庞飞雄及陈泰鲁 (1974)使用的名称page1=441：
* Trichogramma aomoriense
* Trichogramma atopovirilia
* 澳洲赤眼蜂 Trichogramma australicum Giraulf：见于中国page1=441。
* Trichogramma brassicae
* Trichogramma brevicapillum
* Trichogramma carverae
* 螟黄赤眼蜂 Trichogramma chilonispage1=442
* 舟蛾赤眼蜂 Trichogramma closterae Pang & Chen 1974：见于中国page1=441
* Trichogramma deion
* 松毛虫赤眼蜂 Trichogramma dendrolimi Matsumura：见于中国page1=441。
* 食胚赤眼蜂 Trichogramma embryophagum (Hartig)
* 暗黑赤眼蜂 Trichogramma euproctidis (Giraut)：见于中国page1=441。
* 广赤眼蜂 Trichogramma evanescens small|Westwood, 1833：见于中国page1=441。
* Trichogramma exiguum
* Trichogramma falx
* 暗褐赤眼蜂 Trichogramma fasciatum (Perkins)
* Trichogramma fuentesi
* Trichogramma funiculatum
* 稻螟赤眼蜂 Trichogramma japonicum Ashmead：见于中国page1=441。
* Trichogramma jezoensispage1=442
* Trichogramma koehleri Blanchard
* 粘虫赤眼蜂 Trichogramma leucaniae Pang & Chen, 1974
* Trichogramma luteumpage1=442
* 舌突赤眼蜂 Trichogramma lingulatum Pang & Chen, 1974
* 毛利赤眼锋 Trichogramma maoriNZ
* 微小赤眼锋 Trichogramma minutum Riley
* Trichogramma nubilale
* 玉米螟赤眼蜂 Trichogramma ostriniae Pang & Chen, 1974
* Trichogramma papilonis
* Trichogramma platneri
* Trichogramma pretiosum
* 微突赤眼蜂 Trichogramma raoi Nagaraja：见于中国page1=441。
* 窄突赤眼蜂 Trichogramma retorridum (Giraulf)
* 显棒赤眼蜂 Trichogramma semblidis (Aur.)
* 疏毛赤眼蜂 Trichogramma semifumatum (Perkins)
* 凤蝶赤眼蜂 Trichogramma sericini Pang & Chen 1974：见于中国page1=441。
* Trichogramma siddiqi
* Trichogramma thalense
* Trichogramma valentinei
* Trichogramma vitripenne Walker
* Trichogramma yawarae
==参考文献==
==外部连结==
*Trichogramma
*  Biocontrol-oriented Trichogramma Manual
*  Trichogramma Article
*  Trichogramma dropping by drones date=20160704184320