1940 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



ribbed and pitted, very nuicli resonibling 

 the hull of a peanut. The egg is elongate, 

 flattened at the larger end, the edges 

 rounded. From the base end it gradual- 

 ly increases in size to near the middle, 

 then slopes down to a blunt rounded 

 point. It measures .55 mm. long and .29 

 mm. wide. 



Remedial Measures 



Plowing up the infested plants is the 

 method of treatment recomniemled. 



It would seem that possibly the young 

 larvae on hatching from the egg might 

 feed on the leaf or petiole before enter- 

 ing the crown and could be successfully 

 poisoned with an arsenical spray. 



Strawberry False Worm 



Harpiphorm maculatus Nort. 



This insect is sometimes known as the 

 strawberry slug. The adult saw-flies are 

 a little less than one-fourth of an inch 

 long with a one-halt inch wing expanse. 

 The pupa is of a dull greenish-white 

 color. The larvae are a little over one- 

 half inch in length and of a greenish- 

 yellow color. 



There is but on brood each year, the 

 larvae hatching at about the time the 

 first blossoms appear on the plants and 

 continuing until the berries are ripe. 



By thoroughly dusting fresh and pure 

 pyrethrum among the plants, we can kill 

 a large per cent of the worms, and hold 

 them in check so as to prevent any seri- 

 ous damage. As this substance is ab- 

 solutely harmless to man, it can be used 

 with perfect safety at any time, even 

 when the fruit is fully ripe and ready to 

 pick. Two or three applications may be 

 necessary to kill the bulk of the larvae 

 in severe attacks. This method is too ex- 

 pensive for anything but home patches or 

 those supplying a home market. 



The larvae may be practically all killed 

 and further damage prevented, by thor- 

 oughly spraying the plants once or twice 

 immediately after the larvae appear and 

 before the first berries are more than 

 one-third grown, using for this purpose 

 either fresh powdered hellebore in the 

 proportion of one pound of hellebore to 

 each three gallons of water, or one pound 



of Paris green and three pounds of fresh 

 lime in 150 gallons of water. 



Powdered white hellebore, which must 

 be fresh and unadulterated, is the best 

 and safest all-around substance to use, 

 since it kills the larvae readily, is less 

 poisonous to man than the arsenics, and 

 soon looses its strength or poisonous prop- 

 erty after it has been sprayed on the 

 plants. Hence there is no danger con- 

 nected with its use if applied as directed. 

 J. M. Stedman, 

 Ml.ssourl Experiment Station Bulletin 54. 



Strawberry Leaf Beetle 



Typophorus qxiadrinotatus Say 

 J. B. Smith 

 * This is a small, chunky beetle, shin- 

 ing blackish in color at first sight; but 

 when more closely examined it is found 

 that the color of the upper surface is 

 really a very dark, smoky clay-yellow and 

 that there are two oblique black bars on 

 each wing cover. The adult appears in 

 the fields on the leaves during the early 

 days of May, and lingers until after the 

 25th, in ever-decreasing numbers, eating 

 irregular holes in the tissue. These holes 

 vary in size and are so close together 

 that the plants look as if loads of shot 

 had been fired into the foliage at short 

 range. The result is a drying and with- 

 ering of foliage. 

 No life history. 



Remedial Measures 

 As the insects feed openly and eat 

 the entire leaf tissue, arsenical poisons 

 are indicated, and of these arsenate of 

 lead is the most satisfactory and effec- 

 tive. Applied at the rate of one pound in 

 25 gallons of water, as soon as the beetles 

 are noticed, a single application will be 

 sufficient. A very prompt treatment is 

 desirable as the spray should not be ap- 

 plied after the fruit is more than halt 

 grown. 



Strawlx-rry Leaf Roller 

 Ancylis comptana Frohl. 

 Orifjiii and Appearance of the Insect 

 This leaf roller seems to be of Euro- 

 pean origin, and is one of those species 

 which in Its native home is not seriously 



• N. J. Ei. Sta. Bui. 225. 



