Enemies 201 



growth commenced, a little straw was scattered over 

 the clump and set on fire. The flame swept over the 

 clump in a flash and the straw, leaves and grass were 

 entirely consumed, some of the shells were scorched 

 and slightly burned, but the live rhizomes appeared 

 to have suffered no injury whatever. The following 

 spring growth began at the usual time and the foliage 

 was as abundant and vigorous, and the flower-stems 

 as numerous, large and floriferous as ever before. The 

 experiment was repeated March 3, 1920, and again 

 January 28, 1921, and each time with like result. 



If the eggs have not been destroyed in some manner, 

 by spraying about the first day of May, the usual 

 hatching time, many of the larvae can be destroyed 

 when they begin feeding, before they have entered the 

 plants. Use arsenate of lead and an extract of tobacco 

 (as, black leaf 40) — half a pound of the lead and an 

 eighth of a pint of the tobacco extract to twenty 

 gallons of water. If soap is added — one-fourth of a 

 pound of laundry soap, dissolved, to seven gallons of 

 spray — the spray will stick better. The spraying 

 should be done with a very fine spray nozzle and with 

 strong pressure that will deliver the spray as mist or 

 fog — as, with an Auto Spray — in the sunny hours, so 

 the spray will dry quickly — leaving a film of poison 

 on the leaves — and not form in drops and run off. 

 If the leaves are drenched instead of being made 

 merely fuzzy with the mist practically all of it will 

 run off. 



Spraying will be more effective if all debris has 

 first been removed and burned. 



