1908.] Insect, Fungus and other Pests. 



47 



Tetrany chits. These genera may be^ distinguished under^the 

 microscope as follows : — 



Bryohia. Tenuipalpus, Tetranychus, 



Fore margin No scale-like No scale-like 



of the front part projections ; the projections ; the 

 of the body has legs are short and first pair of legs 

 four scale-like heavy. are longer than 



projections ; the the body, 



first pair of legs 

 are longer than 

 the body. 



Before the buds begin to burst the bushes should be sprayed 

 with paraffin emulsion, and spraying should be done carefully 

 in order to reach the eggs, which may be seen in the various 

 chinks. A careful outlook should be kept in case the mites 

 show on the young leaves. The Bryobia of the gooseberry has 

 in hot dry seasons proved very destructive to gooseberry bushes. 

 It also lives and thrives on ivy, and this should be borne in 

 mind where ivy is plentiful. 



Eelworms found in the soil in pots of tomatoes were sent 

 from Poulton-le-Fylde, but were not of the species which infest 

 tomato plants. Information as to eelworms will be found in 

 Leaflet No. 75 (Root-knot Disease in Cucumbers and Tomatoes), 

 and in No. 46 (Stem Eelworm). 



Gooseberry and currant shoots from Kingsbridge, Devon, 

 were found to have their tips injured by greenfly. (See Leaflet 

 No. 68 ; Currant Aphides) 



Fungi. — Specimens of gooseberry plants from Dunstable 

 were found to be covered with the harmless saprophyte Phoma 

 grossulariae, Schulz. and Sacc, which is shed with the epidermis. 



Seed potatoes from Chester were found to be infested with 

 the mycelium of Macrosporium solani, Cke. (potato leaf-curl), 

 in the form of brown patches in the interior of the tuber. Such 

 tubers should not be used for seed purposes. (See Leaflet 

 No. 164.) 



Potatoes from Feltham (Middlesex) w r ere badly attacked 

 by potato disease, Phytophthora infes'ans. (See Leaflet 

 No. 23.) 



Samples of narcissus sent from Penryn (Cornwall) were 

 found -to be suffering from a bacterial disease known as 

 " yellow stripe.' ' No satisfactory remedy for the disease is 

 known, but it is advisable to remove and burn all bulbs that are 

 badly attacked. 



