445 



Speare (A. T.). The Fungus Parasite of the Periodical Cicada. — 



Science, Lancaster, Pa. \, no. 1238, 1st August 1919, pp. 116-117. 



The fungus, Massos'pora cicadina, is reported as having been very- 

 prevalent during the recent reappearance of brood x of Cicada 

 septemdecim. 



LiND (J.), RosTRUp (Sofia) & Kolpin Ravn (F). Oversigt over 

 Landbrugsplanternes Sygdomme i 1 915. [Report on Agricultural 

 Pests in Denmark in 1915.] — 105 Beretninq fra Statens Forsog- 

 svirksomhed i Plantekultiir, Copenhagen, 1916, pp. 397-423. 



Among pests of cereals, Heterodera schachtii var. avenue occurred 

 as usual in many localities. The injury was most severe in places 

 where oats, or oats mixed with other plants, had been cultivated 

 previously, but, on the other hand, the non-cultivation of oats even 

 for a period of many years does not ensure protection against this 

 eelworm. Besides oats, winter barley was injured in one locahty 

 and spring barley and wheat in another. Hylemyia coarctata, Fin., 

 was considerably less numerous than in previous years. A flea- 

 beetle, Phyllotreta vittula, Redt., occurred in many localities in great 

 numbers, especially on spring barley in April and May. 



Oscinella (Oscinis) frit, L., was less troublesome than in 1914, owing 

 to cold weather in the spring. The barley-fly, Chlorops taeniopus, 

 Meig. {pumilionis, Bierk.), was very rare. The larvae of Cephus 

 pygmaeus, L., occurred in unusually large numbers in barley in July, 

 the attack being remarkable owing to its apparent occurrence only in 

 certain varieties. The caterpillars of Trachea (Hadena) secalis, Schifi., 

 occurred as usual in rye in May and June, and those of T.{H.) basilinea 

 in August and September. A severe attack of Luperina {Apamea) 

 testacea, Hb,, occurred on oats sown after timothy and meadow- 

 fescue. The Cecidomyids, Contarinia tritici, Kirb., and Sitodiplosis 

 mosellana, Gehin, (C aurantiaca, Wagn.) were present only in 

 smaU numbers. The Aphids, Siphonaphis padi, L., and Macrosiphum 

 granarium, Kirb. [cereale, Kalt.) occurred in June and July on rye and 

 wheat and especially oats. Limothrips denticornis, Hal., L. {Thrips) 

 cerealium, Hal., Haplothrips (Anthothrips) aculeatus. Fin., and a 

 mite, Tarsonemus spirifex, March., occurred in several locaUties. 



Sitones lineatus, L., damaged peas, especially where mixed crops 

 were cultivated, and attacks of Cydia [Grapiholitha) sp. were observed 

 in some locahties in July and August, and of Aphis rumicis, 

 L. {papaveris, F.) on horsebeans in July. Beets and sugar-beets were 

 attacked by Heterodera schachtii, Sch., Gortyna {Hydroecia) micacea Esp., 

 Pegomyia hyoscyami, Pz., Sminthurus viridis, L., Forficula auricularia, 

 L., and Aphis rmnicis. The larvae of Blitophaga (Silpha) opaca, L., 

 were exceptionally numerous in many parts of the country, the 

 attack occurring chiefly in June. 



Pests of cabbages, swedes, turnips, etc., included Phorhia (Chortophila) 

 brassicae, Bch. ; Ceuthorrhynchus quadridens, Pz. ; Phyllotreta nemorum, 

 L., which injured swedes throughout the summer, especially late- 

 sown plants ; Plutella maculipennis, Curt. ; Pieris rapae, L. ; 

 Eurydema oleraceum, L., in July and August on swedes, turnips and 

 curly kale, the attack being chiefly confined to fields in sheltered 

 places ; the locusts, Stauroderus (Stenobothrus) bicolor, Charp., and 



