23 



after the apearancc of the second brood, which is 

 usually in July. The grower should be guided by Ihc 

 conditions on his own premises and if he finds the 

 White Fly very abundant at this time another spraj'- 

 ing should be made witli the same material as recom- 

 mended before. Then another spray should be made 

 the latter part of August, not later than about the first 

 of September. The object of spraying at this time is 

 to kill the White Fly larvae Avhich is the progeny of 

 the third and last brood. It is this brood which caus- 

 es most of the damage from the White Fly. See infest- 

 ed foliage, Plate VII, fig. 2. 



Rust Mite and Red Spider 



Ry the first of June spraying should be made with 

 Lime Sulphur testing 32 degrees Raume, at the rate of 

 one gallon of stock solution to 75 gallons of water. 

 Care should be taken that the fruit is thoroughly cover- 

 ed with the solution and of course the foliage as well. 

 We recommend that another spraying wdth Lime Sul- 

 phur solution be made during the month of July and 

 another in August to prevent any russeting of the fruiL 



Soft Scale 



Some seasons the Soft Scale attacks the orange trees 

 rather severely. During the summer of 1917, the 

 growers had a very hard time to control this insect. 

 We saw^ orchards where the trees, both foliage and 

 fruit, w ere literally covered with the black mold wdiich 

 grows on the honey dew ])roduced by the insects. The 

 scales are usually found on the under side of the leaf 

 and young twigs. They sap the strength out of the 

 tree and prevent its normal development. 



If the insects arc not combatted in time the 

 result is the fruit is nearly black at the time of ripen- 

 ing and washing the fruit becomes necessary before it 

 can be marketed. It is evident that it is more economi- 

 cal to spray the tree in order to prevent the forma- 

 tion of black mold than it is to wash the fruit after it 

 has been picked. 



Spraj'ing material for the control of Soft Scale 

 is the same as used for the While Fly, ex- 

 cepting that three or four pounds of whale oil soap 

 should be added to every fifty gallons of spraying so- 

 lution, as we find that neither Scnarr's Insecticide. 

 Pinewold Ins(>cticide nor Scalecide are sufficiently 

 strong to control this insect. Trees should be exam 

 ined at least everv two weeks to ascertain whether or 



