Wisconsin State Cranberry Growers Association / Wisconsin State Cranberry Growers' Association. Thirty-first annual meeting, Grand Rapids, Wisconsin, January 8, 1918. Thirtieth summer meeting, pavilion, Nekoose, Wis., August 14, 1917
Chaney, A. U.
Observations and suggestions, pp. 21-22 PDF (461.2 KB)
OBSERVATIONS AND SUGGESTIONS By A. U. CHANEY FIGHTING THE VIRE WORM Wisconsin seems to have suffered unusual damage from this pest last season. Probably the cold summer was the cause of the eggs hatching so irregularly that repeated floodings seemed necessary. These repeated floodings greatly reduced and often destroyed the crops. For a number of years the New Jersey growers have suffered severe ravages of the fire worm. The New Jersey growers. Mr. Scammell and other government experts, have tried many experiments. Some of them seem to have proven very successful. During last season I made diligent inquiry as to methods and results. Mr. Scammll seems to have proven the nicotine, mixed one gallon to seven or eight hundred gallons of water and sprayed at the proper time, Is very effective. When the fire worm appears in the blossoming, period, or after the firuit is set, flooding is very likely to injure or destroy the crop, whereas spraying with nicotine greatly retards the fire worm damage and very frequently totally destroys them. Mr. White, Mr. Harrison. Mr. Holman and other well-known growers have proven that by spray- ing at these times they often save at least one-half of the crop, where- as the flooding at that dangerous period would totally destroy it. This nicotine is a contact poison, known as "Black Leaf 40" and is much more effective than food poison, such as krsenate of lead, Paris green, etc. It is sold by the Tobacco Products Company of Louisville, Ky., and costs about $10.00 per gallon; but using only one gallon to eight hundred gallons of water does not make it expensive. Two sprayings are often advisable, and the sprayings should be two or three days apart, as it is strictly contact poison. That which appears to have been the most successful remedy is about as follows: In the spring, before taking the water off lower the head so that the vines are just barely covered with water. This shallow flooding will help to warm the soil and give the vines an opportunity for an early start. Then at about the usual time take the water off and leave it off from three to five weeks watching very closely for the fire worm to appear. After they have appeared pretty generally over the bog and most of the eggs have apparently hatched, reflood, covering every- thing with water and keeping it under water five days. Make a kero- sene torch with a gas pipe or tubular handle to hold the oil fuel and wade over the bog, or go over it with boats, and burn everything that sticks over the water, such as high vines, grasses or weeds, giving the worms no opportunity to crawl above the water and live. Some suggest that cutting off these grasses or weeds that stick above the water and letting them fall into the water will accomplish the same results. This method seems to have effectively destroyed the fire 21
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