572 



containing from 6 to 20, hatch in about a week. The larvae feed on 

 the leaves, at first in colonies but later scattered throughout the field. 

 They generally feed near the midrib and near the middle of the plant. 

 WTien very abundant, they also attack the stalks. They pupate after 

 about three weeks, and the moths appear three weeks later, giving 

 an approximate life-cycle of from seven to eight weeks. At least 

 two generations a year occur in Virginia. 



In Europe E. straminalis has been recorded as feeding in confine- 

 ment on wild plants of the genera Barbarea, Sinapis and Cardamine. 

 Two years study in the district of Columbia has only revealed one 

 parasite, Bracon montrealensis, Morr., which attacks the larvae. 

 Lead arsenates and lime and zinc arsenite will probably be of equal 

 value against this pest M'hen used for other caterpillars on cabbage, 

 but as the larvae often feed near the base of the plant, spraying under 

 the leaves is essential. For slight infestations handpicking is advocated . 

 Autumn and spring ploughing is suggested for the destruction of 

 pupal cases when the moth occurs on horse-radish, but if the latter is 

 planted in beds, sprays will have to be employed in cases of severe 

 infestation. 



Smyth (E. G.). Plant Inspection and Quarantine Report (1918-19). — 



Porto Rico Insular Expt. Sia., Rio Piedras, Ikill. 23, September 

 1919, pp. 5-56, 20 tables. [Received 1st October 1921.] 



This paper is a resume of plant quarantine work in Porto Rico 

 from 1910 to 1919. The plants, fruits and seeds inspected and the 

 insects intercepted in each of these years are tabulated. 



Catoxi (L. A.^i. Plant Inspection and Quarantine Report (1919-20). — 



Porto Rico Insular Expt. Sta., Rio Piedras, Bull. 27, 1921, 23 pp. 

 4 tables. 



A description is given of the setting up in 1919 of a Technical Board 

 to supervise Plant Quarantine and Inspection. In January, boll- 

 weevils [Anthonomus grandis] were found in some unlawfully imported 

 cotton seed, but there was no trace of the pest in the area planted 

 before inspection. 



No quarantine is to be established against cotton products [R. A.E., 

 A, ix, 313, 399] until it is proved that fumigation with hydrocyanic 

 acid gas, as practised at the port of New York, is ineffective against 

 the cotton leaf -blister mite {Eriophyes gossypii). 



The following pests have been intercepted :— From Spain, BrucJnts 

 pisorum in Lima beans and in Y)eas,CaIandra oryzae in beans and maize. 

 From New York, Philadelphia and Ohio, Pseudococcus on potatoes, 

 Clirysanthemum, Dracaena, Dahlia, and Saxifraga sarmentosa. From 

 South Carolina, Anthonomus grandis in cotton seed. From the 

 Virgin Islands, Aspidiotus hartii on yams, tannias and grass. From 

 San Domingo, Bruchus sp. in beans and maize. From Guadeloupe, 

 Bruchus sp. in seeds. 



Matz (J.). Citrus and Pineapple Fruit Rots. — Porto Rico Insular 

 Expt. Sta., Rio Piedras, Bull. 24, September 1920, 12 pp., 3 figs., 

 3 tables. [Received 1st October 1921.] 



Various fruit rots of Citrus and pineapples are discussed. The 

 puncturing of pineapples by mealy bugs (Pseudococcus bromeliae) is 

 often responsible for the spread of fungus diseases. 



