— 49 



seems to be carried over chiefly by spores dinging to the seed, and formalin 

 treatment of the seed has given good results in contralling the disease. 



According to European investigators the fungus develops another spore 

 form on straw that has been exposed to the weather, and on this account should 

 be classed as Pleospora grainincum. 



Tip-burn of Potato. — The hot dry weather of the season was very favour- 

 able for this disease and it was unusually severe. 



The symptoms of the disease are the death of the leaves at the margin and 

 tip. The afifected part turns dark and the leaves rdll up. The disease is due to an 

 insufficient supply of water and hot sunshine. Anything that tends to lower the 

 vitality of the plants, as insect attacks, increases the severity of the disease. Any 

 measures to conserve the moisture or supply moisture to the soil, and the control 

 of insects and fungi by sprayin.q' will help to hold the disease in check. 



A portion of two diseased Caues affected with Cane-blight 



Tomato Blossom-End Rot. — The weather conditions were, also, favourable 

 for this disease, and it was very perva'lent. The disease may be recognized by a 

 decay beginning at the blossom and gradually extending over the tomato. The 

 cause of the disease is not known. However, it is not troublesome when the 

 plants are supplied with sufficient moisture. Watering or such measures as will 

 conserve the moisture in the soil will contrdl the disease. 



Raspberry Cane Blight {Coniothryrium Fuckclii). — Raspberries suffered 



