First report on egg-parasitoids of the Asian planthopper Ricania speculum
نویسندگان
چکیده
The first findings of egg-parasitoids of the invasive planthopper Ricania speculum (Walker) (Hemiptera Ricaniidae) are presented. Aprostocetus (Ootetrastichus) crino (Walker) (Hymenoptera Eulophidae), a native species until now only associated with Oecanthus spp. (Orthoptera Oecanthidae) eggs, was the most common. Chaetostricha similis (Silvestri) (Hymenoptera Trichogrammatidae) and Polynema sp. (Hymenoptera Mymaridae), which also emerged from R. speculum egg clusters, should be confirmed as parasitoids of this planthopper.
منابع مشابه
Egg morphology , laying behavior and record of the host plants of Ricania specu - lum ( Walker , 1851 ) , a new alien species for Europe (
The exotic planthopper, Ricania speculum (Ricaniidae) was recently detected in Liguria, in northern Italy, and recorded as a first alert for Europe. The first morphological description of eggs and laying behavior are given. Eggs are inserted into the woody tissue of a wide range of different host plants in such a unique manner among native and alien planthoppers of Italy that it can be used to ...
متن کاملFirst report of Ricania speculum (Walker, 1851) in Europe (Hemiptera: Fulgoromorpha: Ricaniidae).
Ricania speculum (Walker, 1851) (Hemiptera: Fulgoromorpha: Ricaniidae) is reported for the first time in Europe. Both nymphs and adults were observed from 2009 in several municipalities of Liguria (Italy). Since the species is extremely polyphagous and is a real pest for several crops in tropical and subtropical areas, the presence of this alien insect is noteworthy, representing a new possible...
متن کاملتأثیر مدت زمان عدم دسترسی به تخم میزبان بر تولید تخم و نسبت جنسی زنبور پارازیتوئید Trichogramma brassicae Bezdenko (Hym.: Trichogrammatidae)
Fecundity and sex ratio are the important factors in the quality control of parasitoid, Trichogramma. In this research, the effect of the host egg deprivation on these factors in Trichogramma brassicae Bezdenko was evaluated. The experiment was conducted with four treatments, each in five replications in a completely randomized design. Twenty mated females (24 h old) were transferred into the g...
متن کاملتأثیر مدت زمان عدم دسترسی به تخم میزبان بر تولید تخم و نسبت جنسی زنبور پارازیتوئید Trichogramma brassicae Bezdenko (Hym.: Trichogrammatidae)
Fecundity and sex ratio are the important factors in the quality control of parasitoid, Trichogramma. In this research, the effect of the host egg deprivation on these factors in Trichogramma brassicae Bezdenko was evaluated. The experiment was conducted with four treatments, each in five replications in a completely randomized design. Twenty mated females (24 h old) were transferred into the g...
متن کاملAn exotic parasitoid provides an invasional lifeline for native parasitoids
The introduction of an exotic species may alter food webs within the ecosystem and significantly affect the biodiversity of indigenous species at different trophic levels. It has been postulated that recent introduction of the brown marmorated stinkbug (Halyomorpha halys (Stål)) represents an evolutionary trap for native parasitoids, as they accept H. halys egg masses as a host but produce no v...
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