13 



tapering- toward the head ; frequently injure the roots of carrots. The 

 mature insects are a species of small fly. 



The leaves of the young- carrots turn reddish, and the roots become 

 minutely furrowed and blotched with rusty patches. The carrots when 

 stored for winter use, although sometimes not showing much injury on 

 the outside, may be found to be perforated in every direction by dirty 

 brown burrows. 



«> 5 



Carrot Rust-fly— natural size (1, 5, 7), and enlarged (2, 6, 8). 



Remedies : Sow late to escape the flies ; spray with kerosene emul- 

 sion solution (one part of the ordinary emulsion to nine of water) ; dust 

 rows with lime, land plaster, or ashes, to which a little coal-oil has been 

 mixed. One application a week should be made through June and into 

 July. Rotation of crops. 



Celery. 



(Insects). 



Celery Caterpillar (Papilio asterias) : The adult is a very hand- 

 some swallow-tailed butterfly. The larva when full-grown is about one 

 and one-fourth inches' long; is pale-green, and marked cross-wise with 

 yellow and black lines. Just behind the head is a pair of horn-like struc- 

 tures, which can emit an unpleasant odor. 



Remedy : Hand-picking is usually sufficient to control the cater- 

 pillars. 



(Fungi). 



Leaf Blight (Cercospora apii) : This fungus disease is sometimes 

 known as "rust," and appears on the leaves first as light spots, which 

 later become brown, and finally yellow. The spots soon increase in size 

 and become irregular in shape, and the plants are seriously injured. The 

 spores can be readily found on the diseased areas. 



Remedies : Spray with Bordeaux while the young plants are in the 

 frames before transplanting, and repeat at intervals of ten days. It is 



