447 



the beginning of July, but the outbreaks were easily checked with 

 nicotine sprays, and at the end of July were stopped altogether by 

 rain and a fungus, Empusa fresenii. 



As regards pests of swedes and turnips the attacks of the flea-beetles, 

 PhylJotreta nemorum, L., and P. atra, F., were of shorter duration 

 than during the previous years, probably owing to cold and wet 

 weather in May. 



Lucerne pests included Hypera {Phytonomits) variabilis, Hbst., the 

 larvae of which were very common in June and July in some localities 

 and did serious damage. A fungus, Entomophthora ijhytonoyni, however 

 killed a great number of them. Cneorrhinus exaratus, Marsh., 

 perforated the leaves of lucerne at the Studsgaard experiment station 

 in June. The outbreak of Luperina (Apamea) testacea, Hb., seems to 

 have ceased quite as suddenly as it began in the autumn of 1914. 

 Ajytinothrips rufus, Gmel., has been noticed on fox-tail grass in May 

 and June, and in one locahty an attack of Amaurosoma flavipes, Fin., 

 was noticed. 



Ferdinandsen (C), Rostrup (Sofie) and Kolpin Ravn (F.). 

 Oversigt over Landbrugslanternes Sygdomme i 1917. [Report 

 on Agricultural Pests in Denmark in 1917.] — 129 Beretning fm 

 Statens Forsogsvirksomhed i Plantekultur, Copenhagen, 1918, 

 pp. 313-340. 



Comparatively few additional pests are recorded during the year 

 under review. 



At the end of May an attack of Atomaria linearis, Steph., occurred 

 in ■ one locality, many plants being cut in two. The postponement of 

 thinning, however, had the effect of saving the plants. Phorbia 

 {Cliortophila) brassicae, Bch., was exceptionally numerous in June 

 and July, turnips suffering less than swedes. In one locality, where 

 no extensive outbreaks had previously occurred, in many fields 

 25 per cent, of the crop was destroyed. 



Meligethes aeneus, ¥., did great damage to seed turnips from the 

 beginning of May until July, other turnip pests being Ceuthorrhynchus 

 assimilis, Payk., C. pleurostigma, Maxsh.., and Psylliodes chrysocephala, L 



Ferdixandsen (C), Lind (J.) & Rostrup (Sofie). Oversigt over 

 Havebrugplanternes Sygdomme i 1916 og 1917. [Report on Insect 

 Pests and Diseases of the Orchard in 1916 and 1917.] — Tidskrift 

 for PlanteavL, Copenhagen, xxvi, 1919, pp. 297-334. 



The apple and pear pests recorded include : — Lepidoptera, 

 Cheimatobia brumata, L., C. boreata, Hb., in some locahties, and Hybernia 

 defoliaria, CI., which appeared in May and at the beginning of June all 

 over the country. The injury was especially marked in 1916, 

 particularly in sheltered orchards near woods. In 1917 the attack was 

 considerably less severe. Apples were as a rule more damaged than 

 pears, but some varieties of apples, such as Beauty of Kent, Reinette de 

 France and Pederstrup Reinette, were much less injured than others. 



The larvae of Chloroclystis rectangulata, L., often occurred in company 

 with Cheimatobia. Argyroploce {Olethreutes) variegana, Hb., occurred 

 in 1916 in great numbers in the buds of various fruit-trees, Eiicosnui 

 (Tortrix) ocellana, F., in 1917 destroyed the buds of young apple-trees 



