M THE KEPOET OF THE No. 36 



I collected three species of isopods in these infested greenhouses: Armadilli- 

 dum vulgare, A. quadrifrons and Oniscus asellus. 



Systemg^tic trapping by means of inverted flower pots containing damp hay 

 will very materially reduce the number of sowbugs. 



A poisoned bait composed of : 



2 parts rye flour or Bibb/s Calf Meal. 

 2 parts sugar. 

 1 part Paris green, 

 is also an effective remedy. 



The tarring of branches is to be recommended, as coal tar, when fresh, acts as 

 a repellant, and as it also preserves the wood it thus deprives the isopods of their 

 favorite harbour — rotten wood. 



Large numbers of sowbugs may be destroyed by pouring hot water into the 

 ^revices and cracks in wooden partitions and benches; by applying it along the 

 edges of greenhouse beds where numerous " bugs " lie concealed ; and by flushing 

 cleared benches and the ground beneath them with it. This method can, of course, 

 be used to greatest advantage where the watering system can be temporarily con- 

 nected with a boiler or where the steam or hot water pipes can be tapped. 



The destruction of all rubbish in and around greenhouses is a very important 

 means of prevention. 



Tarnished Plant-bug, {Lygus pratends). This past year the Tarnished 

 Plant-Bug, masquerading under the name of the Aster Bug, has been far the most 

 serious pest in many Ontario florist's establishments. By its depredations on 

 chrysanthemums and asters it has been responsible for the loss of hundreds of 

 dollars. In reference to this, the manager of the Dale Estate, Brampton, writes: 

 " A conservative estimate of our loss on chrysanthemums this last season would 

 be $3,000, and on asters, $500." 



Dr. Chittenden, of the United States Bureau of Entomology, recommends 

 spraying with a mixture of Black Leaf 40 and Whale Oil Soap as an effective 

 means of controlling this capsid. The keeping down of weeds and the destruction 

 of all rubbish in and around greenhouses is an important preventive measure. 



True Bulb Mite, (Rkizoglypkus hyacinthi). While in London, Ont., last 

 February, Mr. Gammage, of J. Gammage & Sons, drew my attention to the un- 

 Jiealthy condition of a large percentage of his Easter lilies. The foliage of the 

 diseased plants was sickly, yellowish-green in color and was usually streaked and 

 spotted with light markings. So badly affected were some of the lilies that Mr. 

 Gammage found it necessary to throw ont over a thousand of tliem. 



I examined several of the diseased specimens, and in every case I found small 

 translucent mites with brown appendages working in pockets and passages in the 

 bulb, and in many instances, in the stem. These mites were determined by Dr. 

 Nathan Banks as Rhizoglyphus hyacinthi Boisduv. As this species works on many 

 kinds of bulbs and will attack perfectly healthy ones, I am inclined to believe 

 that it was the primary cause of the unhealthy condition of the lilies. 



Cattleya Fly, {Isoaoma orchidearum) . Early in the year this small hymen- 

 opterous fly was reported as being very troublesome in Thomas Manton's orchid 

 house at Eglinton. The female, according to Mr. George Manton, oviposits in the 

 young shoots of the Cattleya plants and the larvse feed on the orchid substance. 



