No. 4.] INSECTICIDES AND FUNGICIDES. 203 



found a satisfactory remedy. "S^Hiether the effectiveness of 

 the remedy is from its ollcnsiveness, causing the insects to 

 seek other fruits in which to lay its eggs, or whether the 

 Paris green kills them, is difficult to determine. 



The fungous diseases attacking the plum, peach and cherry 

 are the brown rot (Monilia fructigena) and the leaf blight, 

 ( Clindrosporium padi) ; attacking the plum and cherry, the 

 black wart (^Plowrightla morhosa) ; attacking the plum and 

 peach, the scab (CIadosporiu7n carpophyllum) ; attacking 

 the peach, the leaf curl ( Taplisina deformans) and the peach 

 yellows. 



The brown fruit rot is a fungus attacking all the stone 

 fruits, more or less, about the time they are nearing matu- 

 rity, although in some cases it appears earlier. The fruit 

 first turns brown in color and then becomes studded over 

 with lighter brown spores in masses. It is most destructive 

 during moist, warm weather, and especially if the trees are 

 planted closely or in shaded gardens. On light land and 

 when fully exposed to good currents of air and plenty of 

 sunshine it is less destructive. 



The leaf hligJit first appears as small brown spots on the 

 leaves ; under favorable conditions these increase in number 

 and size until the leaves fall off* prematurely, often in July or 

 August, causing serious injury. 



The plum and peach scab is an olive-green fungus, caus- 

 ing spots on the fruit. When it appears early in the season 

 the fruit is checked in growth at the point of attack, and it 

 cracks much as the pear cracks when attacked by the leaf 

 blight fungus. 



The leaf cm^l appears on the peach soon after the first 

 leaves are formed, causing them to swell or puff up. They 

 soon drop off, however, and new leaves appear, and the tree 

 seems but little injured by its attack. 



For the destruction of the plum curculio and the above- 

 mentioned fungi the following routine is suggested : first, 

 spray just before the leaves unfold with Bordeaux mixture ; 

 second, spray just after the petals have fallen with Bordeaux 

 mixture (a) and Paris green, one pound to one hundred 

 gallons; third, spray in a week or ten days, according to 

 weather ; if rain has fallen within one week, the shorter in- 



