350 THE MONTHLY BULLETIN. 



QUARANTINE ORDER NO. 21. 



Sacramento. March 4, 1913. 



(CITRUS WHITE FLIES.) 



Quarantine Orders No. 15, under date of August 30, 1912, and IS. under date of 

 December 17, 1912, are hereby amended to read as follows: 



Whereas, The fact has been determined by the State Commissioner of Horticul- 

 ture that the white fly (Aleyrocles citri) is widely distributed in the states of North 

 Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louisiana and 

 Texas, and that tlie white fly (Aleyrodcs mibifera) exists at the present time in the 

 State of Florida; and 



Whereas, Both Aleyrodes citri and Aleyrocles nuMfera are primarily serious pests 

 of, and worlv great injury to, citrus trees ; and 



Whereas, Tliere is great danger of introducing Aleyrocles citri and Aleyrocles 

 iiubifera into the citrus groves of California by the importation of sucli plants, trees 

 or ornamental nursery stoclc as are known to be liosts or food plants of any or all 

 species of citrus wliite flies from eacli of tlie states aforesaid. Now, tlierefore, it 

 is hereby 



Ordered, directed and declared, that a horticultural ciuarantine be, and tlie same 

 is, hereby established in accordance witli tlie provisions of Section 2319-5 of tlie 

 Political Code of tlie State of California, against all the Icnown host plants of 

 Aleyrodes citri and Aleyrodes mibifera as follows; 



Allamanda (Allamanda neriifolia) 



Banana shrub (Magnolia fuscata) 



Boston ivy (Ampelopsis tricuspidata) 



Citrus (Orange, lemon, citron, grapefruit, kumquat, tangerine and all other 

 citrus plants) 



Cape jessamine (Gardenia florida) 



Cape jessamine (Gardenia jasminoides) 



California privet (Ligustrum amurense) 



Cherry laurel (Prunus laurocerasus) 



Cultivated pear (Pyrus sp.) 



Crape myrtle (Myrtus lagerstrwmia) 



China berry (Melia asedarach) 



Coffee (Coffea arabica) 



English Ivy (Hedera helix) 



Ficus ^nacropliylla 



Golden privet (Ligustrum sp. ) 



Green ash (Fraxinus lanceolata) 



Japanese persimmon (Diospyros kaki) 



Jasminum fruticans 



Laurestinus (Vibur^ium tinus) 



Lilac ( Syringa vulgaris) 



Mexican orange (C'hoisya ternata) 



Mock olive (Prunus caroliniana) 



Myrtle (Myrtus communis) 



Osage orange (Madura aurantiaca) 



Portugal cherry (Cerasus sp. ) 



Pomegranate ( Punica granatum) 



Prickly ash (Xanthoxylum clava-herculis) 



Smllax (Smilax sp. ) 



Texas umbrella (Melia asedarach var. umhraculiformis) 



Tree of Heaven (Ailanthus glandulosa) 



Trumpet vine (Tecoma radicans) 



Water oak (Quercus aqxiatica) 



yvWA persimmon (Diospyros virginiana) 



Wild olive or devilwood (Osmanthus americanus) 



Yellow jessamine (Jasminum odoratissimum) 

 •or any other that may hereafter become a host plant, imported from the states 

 of North Carolina, South Carolina, Georgia, Florida, Alabama, Mississippi, Louis- 

 iana and Texas, or any other section known to harbor either Aleyrodes citri or 

 Aleyrodes nubifera, into the State of California. All quarantine guardians and 

 deputies of the State Horticultural Commissioner are hereby instructed and required 

 to hold any and all of the aforesaid host plants, nursery and ornamental stock, which 

 are host plants of this Aleyrodes citri and of this Aleyrocles nubifera, subject to the 

 order of the shippers or owners thereof for exportation out of the state, or to be 

 destroyed, and to take every necessary precaution for the prevention of the issuance 

 •of the said wliite flies while the same are being held in quarantine. 



Provided, that all plants, nursery and ornamental trees, other than the host 

 plants enumerated in this order, (excepting coniferous species) imported into 



