-t- DEPARTMENT OF AGRICULTURE. 



LEAF-BIX>TCII (Actinonema rosce). 



This causes irregular black spots on the upper surface of the leaves, somewhat 

 resembling those of apple-scab. Badly affected leaves turn yellow and fall prema- 

 turely. 



n-oL The spraying recommended for mildew will help to keep off this disease 



also, but Bordeaux mixture is more effective. 



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STRAWBERRY. 



LEAF-SPOT (Mycosphtrrella fragarice). 



This disease, also commonly, but unfortunately, known as " rust." is the chief 

 fungus trouble of this plant. It appears as spots ou the leaves, at first bright reddish 

 or purplish in colour. Later, these consist of an ashy-grey centre surrounded by a 

 red or purple area. In severe attacks much of the leaf-surface may be destroyed 

 and a large part of the leaf shrivel up. Summer spores are produced on the older 

 central portions of th- From the hybernating mycelium in the old leaves 



another type of spore is produced which probably forms the source of the spring 

 infection. 



'I'fl. Pick off and burn any affected leaves at the time of setting out a new 

 plantation. Mow closely and burn the leaves after the fruit is picked, if the disease 

 has been at all bad. Spraying is of assistance in keeping the disease in check, but does 

 not seem to be necessary, as a rule, where other precautions are observed and planta- 

 tions are not allowed to remain too long. 



TOMATO. 

 LEAF- SPOT (Septoria lycopersici) . 



Appears as small pale spots on the leaves. When very numerous they cause the 

 leaf to curl and shrivel up. It is rarely serious enough, however, in this Province 

 to call for treatment. 



BLOSSOM END OB POINT ROT. 



This is one of the most serious diseases of the tomato. It affects the fruit only. 

 The disease first appears as one or more water-soaked areas near the style or tip 

 of the fruit, usually when the fruit is half-grown or more. The tissues in these 

 water-soaked areas collapse and they then form flattened or sunken areas of a dark- 

 green to black colour and of a hard, leathery texture. Various bacteria and fungi 

 may gain entrance at these injured spots and produce a rot which rapidly destroys 

 the whole fruit. The black velvety covering commonly seen on such spots is the 

 spore stage of one of these fungi. 



' rol. The exact cause of the disease is still obscure, and hence recommenda- 

 tions of a general nature are all that can be made. It seems pretty well established, 

 however, that the first cause is not a parasite of any kind, although organisms may 

 do much to hasten the final rotting. Plants that are much forced, especially in the 

 earlier stages, are more susceptible. A check in the water-supply is liable to cause 

 a serious development of the disease in such cases. On the other hand, excessive 

 watering also predisposes the plant to the disease, especially on the heavier classes 

 of soils. Heavy manuring with barnyard manure tends to increase the disease. 

 Usually it is worst on light, sandy soils. 



WESTERN- BLIGHT. 



This has been reported from various points in the Okanagan. Affected plants 

 have a dwarfed. " bunchy " appearance and fail to mature fruit. The leaves turn 

 yellow, or yellow mottled with purple; the veins turn purple and the leaves curl. 

 The root system is stunted and the smaller root-fibres show evidence of injury. 



rol. There is evidence that the disease is due to a soil-fungus which gains 

 entrance through injuries to the root made in transplanting. With the ordinary 



