The summerfruit tortrix, Adoxophyes orana F.v.R., is a pest which has recently adapted to the intensive culture of apple and pear. The larvae develop primarily on the young leaves and shoots and occasionally feed on the surface of the fruit. Under Swiss conditions there are two flights per year though there are three in Greece with the second and third overlapping. The diapausing larvae hibernate in the third stage (L3) and begin development again in the spring. There are three periods in which the larvae are active. The methods used to sample populations for making management decisions are: visual examination of flower clusters in spring, sex pheromone traps, and visual examination of shoots and fruit in summer. A model describing the life cycle as a function of temperature allows for the determination of the best time to sample damage and to apply treatments with regard to their particular mode of action. Some classical insecticides provide control curatively but efficiency is always reduced against older larvae. The best results are obtained at egg eclosion following the first flight. The insect growth regulator (IGR), fenoxycarb, is very effective when applied in the spring against the last stage larvae (Ls) of the overwintering generation. A specific virus also gives good control in the spring against overwintering larvae. The mating disruption technique and insect growth inhibitors (ICI), which prevent the formation of chitin, are currently being studied. For all the products used to control A. orana, the timing of the application is extremely important in order to obtain the best

The time of year the adults (flight period) of the parasitoids of S. oleae: Μetaphycus helvolus, Μetaphycus lounsburyi, Scutelista cyanea and Moranila californica and the predator Chilocorus bipustulatus are present, was determined in three areas of Corfu island: Lima, Kontocali and Avliotes. M. helvolus apparently has two flight periods: the first is from A­pril till July and the second from November till December. All the other natural enemies have only one flight period per year. The flight period of M. lounsburyi is from April till August, while S. cyanea flies from August till the end of September or the first days of Oc­tober, and M. californica adults are present from July till the middle of December. Adults of C. bipustulatus appeared from July till December or the middle of January.

The female and deutonyph of Hystripalpus chalkidicus, new species, are described and illustrated. The species was found on an olive tree in Chalkidiki, Greece.

In spring 1985, buds of apple and peach trees in the Naoussa area of northern Greece were severely damaged by larvae of a tortricid moth. Adults emerged in late May and early June. Later in the season, we found larvae of the same species established and feeding on leaves and green or ripe fruits of apple and peach, as well as on ripe cherries. Larvae collected in late June were reared in the laboratory on peach leaves and on an artificial diet. The adults obtained were identified as Adoxophyes orana Fischer von Rosslerstamm (Lepidoptera. Tortricidae). A. orana is a synonym of A. reticulates Huebner, A.tripsiana Eversmann, A. fasciata Walsh., or Capua or Cacoecia reticulana Huebner and most probably, is a recent introduction to Greece. The damage it causes to fruits such as apples, peaches and cherries is such that it could not have escaped the attention of fruit growers and plant protection specialists if the insect had earlier been present in the country. A. orana has been established and caused damage to fruit trees in northwest and central Europe for approximately fifty years and in southern Yugoslavia for at least the last ten years. It is probable that it spread to northern Greece from neighboring Yugoslavia. In the Naoussa area, the moths laid their eggs in batches on fruits or leaves. On peach and cherry the eggs were laid on both sides of the leaves, whereas on apple on the upper side as was observed also in other countries. In early October, the larvae abandoned their feeding sites and went next to auxiliary buds and crevices of the bark of branches to spin their hibernating webs. The adult maleof A. orana has a wingspan of 15-20 mm and the female one of 19-22 mm. The fore wings of the male are yellow ochre reddish, and have distinct rusty-red designs. There is a basal darker (brown) area, and two large darker stripes. The median one departs from the basal third of the costa and terminates, widening or divided in two branches, at the tornus. The other stripe is preapical and may take the form of a triangular spot of which sometimes only the borders are visible. The fore wings of the female are normally darker than those of the male, often blackish-brown, and have darker and dimmer stripes and other markings. The hind wings are light grey in the male and grey-brown in the female. The ground colour in the specimens of northwestern Europe is varying from light brown to dark brown. The fully grown larva is 18-20 mm long, green, with a light brown head. It somewhat resembles the larva of another tortricid, Archipsrosanus L. which is a monovoltine polyphagous species common in Greek orchards in spring. A. orana is polyvoltine and feeds on buds, leaves and fruits of a great number of cultivated and wild plants. Among its reported many hosts are species of Betula, Crataegus, Cydonia, Gossypium, Ligustrum, Lonicera, Malus, Medicago, Pyrus, Populus, Pistacia, Parrotia, Proms,Quercus, Ribes, Rubus, Rosa, Salix, Solanum, Syringa, Tilia, Ulmus, Vaccinium and the grapevine Vitis vinifera.

Laboratory observations showed that adults of the almond seed wasp, Eurytoma amygdali Enderlein (Hymenoptera: Eurytomidae) were sexually mature on the first day of emergence. Experiments with an olfactometer showed that 1 to 12 day-old virgin females attracted the males. This attraction was found to be due to an odor, apparently a pheromone, released by the virgin females. The responsiveness of the males was higher the first part of the photophase. Under field conditions too, virgin females were attractive to males. “Delta” traps, containing 5-20 virgin females, suspended on almond trees, attracted and captured males released among the same trees. On the contrary, traps containing mated females or empty cages were not attractive to males.

The potential rate of increase (PIR), used in Hughes’ time-specific life table analysis for aphid populations as a multiplication factor for the instar-period was studied in popula(ions of Sitobion avenae (F.) in the absence and presence of the parasite Aphelinus abdominalis (Dalman) under controlled conditions. Two factors were mainly found to alter PIR values in the presence of parasites. These were the feeding preference of adult A. abdominalis for the first instar aphids and the prolonged instar duration of the third instar of aphids which had been parasitized by an adult parasite at the first instar. These two factors contributed to lower values of PIR and as a consequence to an underestimation of the expected (potential) population for the next instar-period

The paper contains records of 33 ant species collected in the Zagori region of Northwestern Greece in 1979 and 1981. These are the first records of ants from this region. Some notes on their morphology and ecology are included. An analysis of the general distribution of the species shows that the influence of the Mediterranean, South European, Asiatic and Pontic elements is approximately equal. For some species the region is the southernmost limit in the Balkans. Seven species were observed only over l000 m. while three of them were observed only over 1400m. Most species arc either insectivores or omnivores. Omnivores and species with Mediterranean or South European distribution predominate in or near human settlements.

In two groves of the Chania area, male olive moths, Prays oleae (Bernard) (Lepidoptera: Hyponomeutidae), caught in pheromone traps and eggs and young larvae in young fruits were counted weekly or daily in May, June and July. At Mournies, the first rise in the curve of male captures was observed during the last week of May with a maximum on the 18th in 1980 and on the 10th of June in 1981, and the last captures at the end of June-beginning of July. At Chrysopigi, the maximum of captures in 1981 was on the 5th of June. In all instances the time of maximal moth captures coincided with peaks in oviposition activity, followed after an interval of two weeks by peaks in the number of young larvae found in the fruits.

Sampling results during 1978-1979 and 1981-1982 in two heavily-infested almond orchards in Northern Greece showed a high mortality of the San Jose scale. A considerable part of this mortality was attributable to indigenous entomophagous insects, especially predators. Among them, Cybocephalus fodori Endrody-Younga (Coleoptera: Nitidulidae) appeared to be the key species. Field observations showed that C. fodori hibernates as an adult, forming aggregations. C. fodori reared in outdoor cages showed full adult activity by end March. Given an abundant supply of prey, the insect develops two complete and a third partial generations per year. Under constant conditions (25±2° C, 65±5% R.H. and 16 hrs light per day), the development of its three larval instars was completed in about 19 days and the pupal stage lasted about 10 days. On average, 68 Quadraspidiotus perniciosus Comstock (Homoptera: Diaspididae) adult females were partly consumed per larva of C. fodori. Individually deposited eggs and young larvae were found under the covers of the San Jose scales.

Economic injury levels for cover sprays and air bait sprays were established for the infestation by Dacus oleae (Gmelin) (Diptera: Tephritidae). For cover sprays, the economic injury levels (expressed as percent infestation by taking 30,000 fruits to represent the average number of fruits per tree) were calculated as 7.59% for infestation laid in late July-August, 6.16% for infestation in September and 10.31% for infestation in October. For air bait sprays, economic injury levels were calculated for various fruiting conditions (expressed as proportion of trees bearing olive fruits) and they were much lower than for cover sprays due to the lower cost of air treatments. For July-August, they ranged from 5.07% infestation for 25% trees bearing olives to 1 .27% for 100% trees with olive fruits. For September they ranged from 4.11% to 1.08% infestation, for October they ranged from 6.88% to 1 .72% infestation and for infestation laid in November they ranged from 61.28% to 15.32% infestation, respectively. The economic injury levels for air bait sprays were also expressed as mean weekly number of females per McPhail trap by taking into account the potential fecundity of D. oleae and the efficiency of the McPhail trap (baited with protein hydrolysate 2% and borax 1 .5%) at different times of the year. For September, they ranged from 16 females per trap for groves with 25% of trees bearing olive fruits, to 4 females per trap for 100% trees with fruits. For October, they ranged from 6 females per trap to I female per trap, respectively.