386 HORTICULTURAL MANUAL. 



391. Spraying Garden Plants. The leaf-eating insects 

 are mostly confined to the fruit-trees, small fruits, and 

 shrubs. Hence in the garden the arsenical sprays (156) 

 are mostly used for the destruction of the Colorado potato- 

 beetle, the cabbage flea-beetle, and the striped cucumber- 

 beetle. The kerosene emulsion (158) is used in the garden 

 for the leaf-lice mainly. In lessening the work of the 

 cabbage-louse, and indeed all the aphides, the cleaning up 

 of the garden is a great help, as the eggs live over winter 

 attached to the old leaves and stems if left on the ground. 

 Chinch bugs, when not too numerous, can be headed off 

 in the garden by spraying with kerosene emulsion applied 

 to corn and crops they attack. Keeping the headlands, 

 corners, and fence sides clean is also a great help. 



392. Miscellaneous Garden Insects. The cabbage-worm 

 can readily be eradicated by using the arsenical poisons 

 (156), and extensive growers of cabbage use them without 

 hesitation before the plants begin to head. But amateurs 

 usually prefer to use less dangerous remedies. The most 

 desirable and successful plan adopted by the writer has 

 been to sprinkle the plants before heading with water that 

 has stood over gas-tar in open exposure to the sun. This 

 seems to act as a repellent, as the butterflies very rarely 

 deposit eggs on the leaves scented with tar. If the worms 

 are found in the heads, they can be killed by dusting with 

 flour just at nightfall. This kills by closing the pores of 

 the slimy worms. 



The cabbage-plusia also develops worms from eggs 

 deposited by a winged moth. The tar-water is a repellent 

 also of this moth, and the flour mixed with one sixth its 

 weight of pyrethrum powder will kill the worms if any 

 are hatched from deposited eggs. 



As stated, the cutworm is mostly destroyed by fall 

 plowing. Yet enough may be left to cut off valuable 



