Arizona republican., 1909-07-25
INVESTIGATION OF
 CITRUS TREE PESTS
Prof. Forbes Observations in Florida Arizona Commission Employs Ex-
 enced Entomologist.

x fl. Forbes of Tucson, secretary of of the Arizona Horticultural commis- sion, recently returned from trip or investigation in Florida, the object Of which was to study the situation there regarding the infestation of nurseries and orchards from which Arizona growers have been receiving importa- tions. and the general situations re- garding the different injurious flies and insects of the Florida region.
 In an interview with d Republican reporter last evening he stated that Florida is infested with the purple scale and one of the red scales known bv the name of the Florida red scale. In his investigations he found it pos sible to classify the infectious pest into three species; that is, the kinds common to the Florida orange grow CTS. By their scientific names they may be classed into Aleyrodesnubifera, Aleyrodescitre, and the other is too little known to need mention at this time.
 AIeyrodesnubifera infests only the interior of the citrus trees, especially the water shoots, and may be easily controlled by pruning the water shoots in the winter months, in this way kill ing the pupae and the larvae. This specie is not especially to be dreaded, though it Is not at all desirable, caus- ing more or less drawing.
 Aleyrodescitre is the dreaded specie. and is said to infest over 40 per cent of the Florida groves, being widely IA f,, fgtr- -f,sfss nf Nrnt fully known. It's main characteristic is d sooty mould on the honey dew of the tree, forming the larvae and pupae of the white fly. The black sooty growth also interferes with the grow ing functions of the tree, assimilating the carbon dioxide and formation of starch in the leaves. This specie has three fungus enemies which are not necessary to mention here. and 1t is also found that this particular specie is particularly favorable to humid cli- mates. Florida growers have found that the best means of attack, for the white fly and this specie of pest, is Immigration by the hydro-cyanic pro- cess, or as is better known by the use of slslphuric acid and cyanide. d ltIONtSS llldl dN DiNoNilA AS bNiAAe b'NN by the orange growers of Southern California. This treatment is said to entirely eliminate the scales.
 As has been before stated, little is known of the third specie which in habits the Florida groves. In Mir. Forbes investigations it was found that many of the other food plants be- sides the orange trees are infected. as well as the Umbrellas, Cape Jasmine, Privits, Persimmon, Ash and Lilac trees.
 MT Forbes stated last evening that the citrus industry can not take too careful measures against these pests, which, once introduced, seem almost impossible to permanently drive out. He believes that definite measures of protection should be taken at once and run no chances of having the damage to trees and financial losses, to say nothing of bother and worry. that has been the result of the visitation to Florida growers. Measures more than the casual should be the policy, rigid and careful application of quarantine and the inspection law enforced every season, both to imported nursery pro- ducts and to the output from Arizona groves.
 The commission has seen fit to en- gage the services of A. W. Morrow. an entomologist now stationed at orlando. Fla, in the United States agricultural service, to come to Arizona about the first of September to take the matter up here. MT. Morrow has had the ad- vantage of several years residence in Texas, Florida and Mexico, making a special study of the control of the cit rus pests, and without a doubt is an authority, both scientific and practical, that will be hard to equal.