216 IOWA DEPARTMENT OF AGRICULTURE. 



Three hundred and two replies were received to Question 3. Of these 

 264 listed certain weeds found in private grounds and 286 did the same 

 for weeds of highways; only 138 replies were received with reference to 

 weeds along the railways. 



Two hundred and thirty-nine replied with reference to the methods 

 that were used in exterminating the weeds. In most cases the method 

 given was that of mowing. 



Two hundred and fifty-five make some answer with reference to the 

 methods that were most successful and these answers were generally the 

 method of thorough cultivation. 



With reference to the answers that were returned we had a fairly 

 good number, about 335 in all. It is of particular interest because of the 

 number of reports received, and especially the interest taken in the 

 weed investigation. 



The following is a list of the number of times each weed was re- 

 ported: Quack grass 197, wild mustard 229, Canada thistle 160, wild oats 

 83, sweet clover 223, clover dodder 16, alfalfa dodder 1, field dodder 3, 

 cowbane 18, corn cockle 25, squirrel tail 225, marsh elder 19, cocklebur 295, 

 curled dock 115, smooth dock 130, horse nettle 81, jimpson weed 134, black- 

 heart 1, blackweed 1, big gopher vine 1, buffalo bur 1, bull thistle 7, bur- 

 dock 23, crabgrass 1, dandelion 3, dog fennel 3, dock 1, devil's shoestring 

 1, English smartweed 1, field daisy 1, foxtail 4, hemp 6, 'horse sorrel 3, 

 heart's ease 1, horse 'weed 1, hedge mustard 2, iron weed 3, lamb's quarter 



1, morning-glory 40, milkweed 6, nut grass 2, ox-eye daisy 2, plantain 2, 

 prairie stalk 1, pepper grass 1, pigweed 1, prickly lettuce 3, Russian thistle 

 11, ragweed 16, redroot 1, reptop 1, smartweed 8, sorrel 2, sheepsorrel 2, 

 sunflower 7, spiny nightshade 1, sour dock 10, sand bur 8, Spanish needle 

 6, tan weed 2, velvet weed 46, willow 1, water dock 1, wild artichokes 6, 

 wild buckwheat 2, wild carrot 1, wild lettuce 2, wild parsnip 7, wild rose 



2, wild rye 2, yellow dock 2. 



In going over this list you will notice that a number of weeds are 

 reported much more frequently' than others, among these are the following: 

 Cocklebur, wild mustard, squirrel-tail, sweet clover, quack grass, Canada 

 thistle, jimpson weed, smooth dock, curled dock, wild oats, horse nettle, 

 velvet weed, tan weed and morning-glory. You will notice also in this 

 connection that the dodders are becoming more numerous in this state. 

 This list does not take into account some of the very common weeds 

 found in the state, among them the ragweed, smartweed, foxtail and a 

 host of others. 



With reference to the reports of weeds on highways, sixty-seven re- 

 port the weeds mentioned in the list as occurring along the highways, 

 and especially important were the sweet clover, Canada thistle, quack 

 grass, cocklebur, dock, squirrel-tail, dcdder and mustard. Seventy-eight 

 report the weeds in the list as occurring on private grounds, making spe- 

 cial mention of jimpson weed, cocklebur, velvet weed, smartweed, foxtail, 

 milkweed, mustard, quack grass and Canada thistle. Only a very small 

 number of correspondents report the presence of weeds along railroads, out 

 of the reports received only twenty-five reported the weeds listed as oc- 

 curring along railroads, making special mention of dock, Canada thistle 

 and quack grass. 



