Semiaphis nolitangere Aizenberg, 1954 and differences between the genera Semiaphis van der Goot, 1913 and Hyadaphis Kirkaldy, 1904

The life cycle and distribution of Semiaphis nolitangere Aizenberg are cleared, the alate sexupara and the sexual morphs are described, and the differences between the genera Hyadaphis Kirkaldy, 1904 and Semiaphis van der Goot, 1913 are discussed

Aphid species and morphs new to the fauna of Finland (Homoptera, Aphididae, Macrosiphini)

Collecting data are represented on 26 species and subspecies new to Finland and some morphs are described for the first time. Comments on some species are given and new characters of diagnostic value are described for several species. Acyrthosiphon aurlandicum Heikinheimo, 1966 is a junior synonym of A. brachysiphon Hille Ris Lambers, 1952. A new subgenus, Metobion, with typus subgen. Acyrthosiphon (Metopolophium) graminearum Mordvilko, 1919, is erected in the genus Sitobion Mordvilko, 1914

Aphidoidea of Åland, SW Finland

Localities, host plant observations, and collecting dates for 200 species and subspecies of Aphidoidea from Åland are presented. Diagnostic characters are given for 14 of these species, which are new to Finland, and for 2 species new to all the Nordic countries

Nasonovia (Kakimia) saxifragae (Doncaster & Stroyan) (Homoptera, Aphidoidea) found in northern Fennoscandia

The species Nasonovia (Kakimia) saxifragae Doncaster & Stroyan, 1952 has been found for the first time in North-West Europe, in Finnmark, Norway. The first description of the fundatrix and biometric data and other diagnostic characters of the viviparous morphs are presented

Further species of Aphidoidea (Hom.) new to Finland

Potty aphid species with find records, diagnostic characters and some biometric data are represented as new to Finland. Six species are mentioned for the first time from the Nordic Countries. Nine species include descriptions of some morphs apparently for the first time. The record of Dysaphis aizenbergi Shaposhnikov from Finland (Heikinheimo 1990) was based on a misidentification. The species should be Brachycaudus linariae Stroyan. The status of Iziphya austriaca Börner, 1950 as a good species is discussed

Comparison of suction and netting methods in population investigations concerning the Fauna of grass leys and cereal fields, particularly in those concerning the leafhopper, calligypona pellucida (F.)

vokKirjasto Aj-kImu- ja haavintamenetelmien vertailu heinä- ja viljapeltojen eläimistöä, etenkin vljakaskasta. Calligypona pellucida (F.), koskevissa populaatiotutkimuksiss

Kirvojen preparointi ja määritys

vokmaatu

Pihlajamarjakoin torjunta antoi hyviä tuloksia 1968

Ilmestyy Maaseudun Tulevaisuuden liitteenävKirjasto Aj-

Tutkimuksia herukkapensaiden lehtikirvoista ja niiden torjunnasta

vKirjasto Aj-

Hedelmäpuiden tuhoeläinten torjunnasta

vokKirjasto Aj-