Summary: The literature on various aspects of the biology of Johnson grass. Sorghum halepense (L.) Pers. is reviewed. Topics discussed include its distribution, cytology, taxonomy, life cycle, variability and the dormancy and germination of its seeds and rhizomes.

Resume: ZusammenfassungLolium rigidum Gaud, is an important weed of winter crops in some countries with Mediterranean-type climates. This paper reviews L. rigidum competition in wheat, factors influencing populations of this weed and the effect of control of Z,. rigidum numbers on wheat yields. Biologie deLolium rigidum et iutte contre cette adventice du hie Lolium rigidum Gaud, est une importante mauvaise herbe des cultures d'hiver dans certains pays soumis a des climats de type mediterraneen. La presente publication envisage la competition entre L. rigidum et le ble, les facteurs aflectant les populations de cette mauvaise herbe et Teffet de la limitation en nombre de L. rigidum sur les rendements du ble. Die Biologie und die Bekdmpfung von Lolium rigidum als ein Unkraut in Weizen Lolium rigidum Gaud, ist in verschiedenen Landern mit mediterranem Klima ein wichtiges Unkraut in Winterkulturen. Diese Arbeit gibt einen Oberblick ijber die Konkurrenz von L. rigidum in Weizen, uber Faktoren, die die Population dieses Unkrauts beeinflussen und uber die Wirkung einer zahlenmassigen Reduktion an L. ngWuni-Pflanzen auf den Weizenertrag.

Knowledge on the pygmy grasshoppers of Australia is, despite the numerous endemics being described from this unique continent, still scarce. Of interest is the Vingselina genus group, including genera Anaselina Storozhenko, 2019, Paraselina Storozhenko, 2019, Selivinga Storozhenko, 2019 and Vingselina Sjöstedt, 1921. The systematic position of this group, currently assigned to Batrachideinae (Bufonidini), is probably not correct. In this study new records are presented of Anaselina minor (Sjöstedt, 1921), Paraselina brunneri (Bolívar, 1887), P. trituberculata (Sjöstedt, 1932), and Selivinga tribulata Storozhenko, 2019, all except A. minor the first records of the species since their original descriptions. The first photographs of living specimens of A. minor, P. brunneri, P. trituberculata and S. tribulata are provided and their habitats described. All the records were compiled by citizen scientists who use online social media, such as iNaturalist. Lastly, P. multifora (Rehn, 1952) syn. nov. represents a junior synonym of P. brunneri.

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