It is usually pale green with a fine darker green mottling, covered with wax meal see first picture below , but on the summer host reeds there are dusky red as well as green forms see second picture below. The antennae are quite short, between 0. The siphunculi are very short, and are thicker and darker towards the apex; they are also flangeless and rounded at apex. The cauda is 1. The body length of the adult aptera is 1. The Hyalopterus pruni winged form see third picture above has the head and thorax blackish and the abdominal dorsum pale green, with a distinctly pigmented band across tergite 8 and traces of dark sclerites on tergites
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Common name: Mealy plum aphid. Host plants: Almond , apricot , peach and other Rosaceae, as well as the monocotyledones Arundo reed , Phragmites and Typha. Morphology: The apterous female is green, with a darker dorsal band and partially covered by whitish mealy wax.
The antennae are shorter than the body, the siphunculi are dark gray, the cauda is green and longer than the siphunculi; body length about 2. Life cycle: On reed the aphid reproduces by viviparous parthenogenesis throughout the year, its populations peaking in spring and to a lesser extent in autumn.
During the latter season alate females, along with males, fly to almond, apricot or peach trees whereon they produce sexual females that mate and lay overwintering eggs.
The eggs hatch in the following spring and the resultant females reproduce by viviparous parthenogenesis until early summer.
Apterae then occur and migrate back to reed; the Rosaceous hosts do not harbor the pest during summer. The aphid thus undergoes two concurrent cycles, one parthenogenetic on reed, the other a sexual cycle on Rosaceae. The pest may annually raise 40 generations, producing 30 progeny on suitable apricot varieties, far less on other hosts.
Economic importance: Most of the damage of this pest is to almond leaves, which may roll and shed, followed by retarded tree growth and fewer and smaller fruits. Infested trees are contaminated by the abundant honeydew and the subsequent sootymold. This aphid is a serious pest of dried plums in California, Management Monitoring: Susceptible cultivars should be monitored with sex- pheromone traps for aphid presence, from early spring and on.
Certain apricot cultivars inhibit pest development, probably due to the presence of secondary plant constituents. Chemical control: When necessary, the pest may be controlled with systemic organophosphates. Biological control : Several endoparasitoids of the family Aphidiidae attack the pest, of which Aphidius colemani Viereck is the more common.
In Turkey the aphid is parasirized by mites and three coccinellids , of which Exochomus nigromaculatus Goetz is the more promising. Other predators include larvae of Syrphidae and Cecidomyiidae.
The entomopathogenic fungus Neozygites fresenii Nowakowski Batko infects the pest, but its effect on pest populations and damage in not known. References Atlihan, R. Development, survival and reproduction of three coccinellids feeding on Hyalopterus pruni Geoffer Homoptera: Aphididae.
Turkish Journal of Agriculture Bayram, S. Turkiye Entomoloji Dergisi Jerraya A. Sur la dynamique des populations de Hyalopterus pruni Geoffroy Hom.
Karl, E. Investigation of plum cultivars for susceptibility to infestation with the plum aphid Hyalopterus pruni Geoff. Mescheloff, E. Biosystematic studies on the Aphidiidae of Israel Hymenoptera: Ichneumonoidea. The genera Pauesia, Diaeretus, Aphidius and Diaeretiella. Israel Journal of Entomology Biological features and life table parameters of the mealy plum aphid Hyalopterus pruni on different apricot cultivars.
Phytoparasitica Saleh, A. Egyptian Journal of Biological Pest Control Symmes, E. The sex pheromones of mealy plum Hyalopterus pruni and leaf-curl plum Brachycaudus helichrysi aphids: identification and field trapping of male and gynoparous aphids in prune orchards. Journal of Chemical Ecology
EPPO Global Database
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