265 



common phase of twitter to the work of a phiut-louse of the genus 

 Siphouophora. He figures and describes the insect, but does not give 

 it a specific name. In a recent letter he has sent us an interesting 

 sketch of a form of twitter caused by the plant-louse in question, which 

 we rejiroduce herewith. Kerosene emulsion will prove eflficacious 

 against the Siphonoj)hora, but where examination shows that the 

 anthomyiid larva mentioned upon page 45, volume vi., Insect Life, is 

 causing the damage there will be no remedy until the life history of the 

 insect has been worked out, except to pull up and burn infested plants. 



LEGISLATION AGAINST INSECTS IN BRITISH COLUMBIA. 



Under the authority of the "Horticultural Board Act, 1894" the 

 Provincial Board of Horticulture of British Columbia has published a 

 set of fifteen rules and regulations providing for a complete system of 

 inspection of fruit and fruit trees in that province. The Board, which 

 is composed of the Minister of Agriculture, the Statistician of the 

 Department of Agriculture, the Inspector of Fruit Pests, and a repre- 

 sentative from each of five horticultural districts, declares that the 

 word pests " shall mean and include woolly aphis, apple-tree aphis, 

 scaly bark-louse, oyster shell bark-louse, San Jose scale, red scale, 

 borers, codling moths, currant worms, or other known injurious insects, 

 and all fungous diseases." Notification of the presence of pests is to 

 be given by the owner of infested stock to the proper officer of the 

 Board, and nursery stock shall not be distributed until a certificate is 

 obtained from the Board that such stock appears to be clean ; the cer- 

 tificate to remain in force for three months. Infected nursery stock is 

 to be cleansed by using the remedies prescribed by the Board or 

 approved by it, and shall not be distributed until certified as clean by 

 the Board. Imported fruit is not to be taken from the wharf until 

 inspected, and if found infested, shall be destroyed or returned to the 

 shipper. Home-grown fruit is also subject to inspection, and if found 

 infested shall be quarantined or destroyed. 



The regulations prescribe that all infected nursery stock shall be 

 disinfected either by dipping in a solution of one pound concentrated 

 lye and one pound whale-oil soap in five Imperial gallons of water, or 

 by fumigation with cyanide of potassium. A lime-salt-and-sulphur 

 solution is recommended as a winter spray for the woolly aphis and 

 scale insects; a mixture of whale-oil soap, sulphur, caustic soda, and 

 commercial potash in water as a summer remedy for the San Jose 

 scale, and the Bordeaux mixture for apple scab and all fungous dis- 

 eases. All boxes, crates, or other packages which have contained 

 infected nursery stock are to be burned immediately after the removal 

 of the contents, and hop-fields, when infested with the hop louse, are 

 to be sprayed under the direction of the Board. The penalty fixed 

 for the violation of these rules is a fine not to exceed fifty dollars for 

 each ofl'ense. 



