Plumbaginacese Plumbago. 



Proteaceae *Grevillea. 



Punicaceae Punica. 



Rhamnaceae *Zizyphus. 



Rosaceee Crat&gus, Eriobotrya, Prunus, Pyrus, Rosa. 



Rubiaceae Adina. 



Rutacese Citrus. 



Salicacese Salix. 



Solanace33 Sclanum. 



Tiliaceae Corchorus. 



Verbenaceae Duranta, Lantana. 



Vitaceae Vitis. 



N.B. From the above it will be seen that the families containing 

 the genera most heavily attacked are LEGUMINOS^E, MALVACEAE, 

 MORACE^E, PROTEACE^E, and RHAMNACE^E. 



PART OF THE PLANT ATTACKED. 



This pest has been found on all the aerial parts of a plant and 

 in one or two isolated cases on the roots. It shows a marked preference 

 for the growing points and young shoots to which it gives a gnarled 

 appearance. In winter the ovisacs can be found in large numbers 

 on the barks of trees that have been heavily infected the previous sum- 

 mer, and it is not uncommon to see a Lebbekh or a Mulberry tree with 

 a white bole due to the accumulation of ovisacs. 



REMARKS. 



This species, which is commonly known in Egypt as the "Hibiscus 

 Mealy Bug," has been a very serious pest in Cairo for the last four 

 years. This outbreak has been fully dealt with in the paper referred 

 to above. At present this pest only occurs in Cairo and certain 

 towns in Upper Egypt and every precaution has been taken to prevent 

 the enlargement of the infected area. Legislation has been enacted 

 regulating the transport of plants- and fruit from the infected area, 

 the nursery gardens are kept as far as possible clean and the replace- 

 ment of heavily attacked trees by less susceptible varieties is urged. 

 The attack in the summer of 1921 was very much less in Cairo as a 

 result of these measures, except in the areas where the advice was 

 disregarded. The gradual replacement of the worst host plants should 

 relegate this species in time to the position of a minor pest. 



Considerable uneasiness has been felt as to the possible danger 

 to the cotton crop. Cotton is a host plant which is particularly 

 congenial to Phenacoccus hirsutus Green, but as it is an annual 

 and the number of permanent trees and shrubs in the fields is very 

 small I. think the danger of a serious outbreak on cotton is remote. 

 In places where cotton has been grown in the immediate vicinity of 

 heavy infection, generally close to a village or town, considerable 



