467 



of roads, and attacks by these pests usually indicate weakness of the 

 bushes due to unfavourable conditions, such as poor soil, inadequate 

 drainage, deficiency in manuring, or excess of nitrogenous manures, 

 which produce vigorous-looking bushes, but with insufficient vitality 

 to withstand attacks. In this connection attention is drawn to 

 recent investigations in Assam in regard to soil manuring to control 

 Helopeltis[R.A.E., A,Vin,2QA]. 



Manure on many estates is only applied at two or three-year intervals, 

 after pruning, but' it would be better if smaller doses were applied more 

 frequently. Special attention should also be given to the question of 

 drainage in areas where these pests are prevalent every year. These 

 methods have a more permanent effect than insecticide spraying. 



For severe attacks in small areas, the bushes may be pruned, the 

 prunings burnt, and the bushes sprayed with kerosene emulsion. 



Hernandez (A.). Plant Pests Control Division.— 2M Ann. Kept. 

 Philippine Bur. Agric, 1920, Manila, 1921, pp. 47-51, 3 plates. 

 [Received 2nd August 1921.] 



Locust infestation in 1920 was confined during January and February 

 to 5 districts only, but increased in May to 46, and in October to 52, 

 after which it diminished. The extermination of this pest has been 

 greatly helped by the Locust Law, which secures the co-operation of 

 the towns and municipal and provincial officials. The regular locust 

 breeding places are supposed to be in the area of bamboos and reeds 

 in the province of Cotabato. Arrangements are being made for 

 planting this area with such quick-growing trees as Leiicaena glaiica. 



Most of the coconut palms attacked by black and red beetles [Oryctes 

 rhinoceros and Rhynchophorus ferrugineus] survive, except where they 

 are few in number and where sugar-cane is grown, as the putrefying 

 sugar bagasse is a favourable breeding place for these beetles. Out- 

 breaks of the leaf miner, Promecotheca cumingi, were controlled by 

 parasites. Thosea cinereomarginata severely attacked certain coconut 

 groves, but the caterpillars were easily controlled by three species of 

 Hymenopterous parasites, while a Dipteron attacked the pupae. 



Many insects were intercepted by the Plant Inspection Service 

 during 1920, including Bruchus sp. in cowpea seeds from Cahfornia, 

 and Rhahdocnemis ohscura in sugar-cane cuttings from Hawaii. 



An Administrative Order was made prohibiting the importation of 

 fruit from countries where the Mediterranean fruit-fly {Ceratitis 

 capitata, Wied.) is established. In the case of Austraha, fruit may be 

 imported, subject to the ordinary inspection, from the States of 

 Victoria, Tasmania and South Australia, if accompanied by a certificate 

 that it originated from such States and is free from any pests or diseases. 



Garman (H.). The Relation of the Kentucky Species o! Solidago to 



the Period o! Activity o£ Adult Cyllene robiniae. — Kentucky Agric. 

 Expt. Sta., Lexington, Bull. 231, March 1921, 22 pp., 6 figs. 

 [Received 3rd August 1921.] 



This paper consists mainly of continued observations on the adult 

 of the Cerambycid beetle, Cyllene robiniae, and its food-plant, Solidago, 

 together with other related species [R. A.E., A, v, 401]. 



The life of the adult borer extends from September to October, the 

 beetles disappearing when the frosts destroy the goldenrod flowers. 

 A list is given of the species of Solidago in Kentucky on which C. robiniae 



