363 



Compere (H.). Notes on the Tomato Psylla.— Mi^Zy. Bull. Cal. State 

 Commiss. Hortic, Sacramento, v, no. 5, May 1916, pp. 189-191, 

 3 figs. 

 The Psyllid, Paratrioza cockerelli, Sulc, is distributed throughout 

 the south-western part of the United States and has been recorded on 

 the following host plants : — Capsicum annuum (pepper), Solanum lyco- 

 persicurn (tomato), S. tuberosum (potato), Purshia sp., Thuja occidentalis 

 (arbor vitae), Picea sp. (spruce), Pinus monophylla, Medicago sativa 

 (lucerne) ; the specimens under consideration were taken from 

 *S'. capsicastrum (Jerusalem cherry). In Sacramento broods are con- 

 tinuous throughout the year. During January the mortality among 

 the newly-hatched nymphs may reach 50 per cent, if the temperature 

 is very low. Adults in captivity were extremely active and lived 

 more than a month. Oviposition began three days after pairing and 

 continued for three days. Eggs were deposited on any part of the 

 leaf ; the average number laid by one female was thirty-six. The 

 ijicubation period in a hot-house was 15 days, while the nymphs reached 

 maturity in about 30 days. Suitable methods of control were spraying 

 with water and Black Leaf 40, at a strength of 1 to 1,500 (for thin- 

 leaved ornamental plants), or kerosene emulsion and 1 to 20 U.S. gals. 

 water (for more resistant plants). 



EssiG (E. 0.). Two Newly-Established Scale Insects.— Mfhly. Bull. 



Cal. State Commiss. Hortic, Sacramento, v, no. 5, May 1916, 



pp. 192-197, 6 figs. 

 Pulvinaria floccifera, Westw. (camellia scale) at present occurs in 

 California only in the San Jose district. The favourite host is Camellia 

 japonica, other food-plants being Euonymus sp., Oncidium papilio, 

 coffee, Calanthe natalensis, Brassia verrucosa, Anguloa clowesii and 

 Lycaste skinneri. Outside California this species is foimd in the south 

 and east of the United States and in Canada. Immature forms can 

 be readily killed during the winter months by the use of oil emulsions 

 and miscible oil sprays. Chrysomphalus dictyospermi, Morg., has been 

 found on greenhouse plants at Berkeley, Marysville, and San Diego. 

 The host plants are Kentia palms, orchids, avocado and Coelogyne 

 cristata. In Spain, Italy and Sicily, this insect is an important pest 

 of citrus trees. Other food-plants are Dictyospermum album, Cycas sp., 

 mango, Pandanus graminifolius, etc. Control measures, other than 

 the destruction of infested plants, have not been resorted to in 

 CaUfornia. 



Maskew (F.). Quarantine Division ; Report for the Month of March 

 1916. — Mthly. Bull. Cal. State Commiss. Hortic., Sacramento, v, 

 no. 5, May 1916, pp. 198-200. 



The following insect pests were intercepted : — 

 From China : Chionaspis sp. on unknown plant. From Hawaii : 

 Pseudococcvs bromeliae and Diaspis bromeliae on pineapple ; Coccus 

 longulus on betel leaves ; Lepidosaphes beckii, Lecanium sp. , Ischnaspis 

 longirostris, Morganella mashdli, Howardia biclavis, Parlatoria per- 

 gandii and Chionaspis sp. on plants and cuttings ; Coleopterous larvae 

 in melon seeds ; Hemichionaspis minor on green coconuts ; Chionaspis 

 sp. on air plant ; Pseudococcus sp. and H. biclavis on guava roots. 



