256 Mississippi Valley Horticultural Society. 



younc: plants should be set in the new field and allowed to remain until the 

 runners have started and taken root, after which the plants first set should be 

 dug*up and destroyed. In this way the field is finally stocked with plants 

 which have not been previously in contact with those seriously infested. 



le. As a security against the transfer of eggs of insects laid upon or about 

 the roots of strawberry plants, it is sometimes advisable to wash these thor- 

 oughly after reinoval from the earth. 



2. Barriers to Progress. 



2/(. To prevent the entrance of hordes of injurious insects like the army 

 Worm, the practice of plowing a furrow around the field (afterwards deep- 

 ened, if necessary, with a spade) has been found efficient. The insects ac- 

 cumulating in the furrow may be destroj^ed by dragging a log of wood :ilong 

 it. or by digging holes at intervals in the bottom of the furrow, in which th'^ 

 insects will accumulate, where they maj^ be easily crushed en masse. 



26. To prevent the spread of insects wdiich are destitute of wings, and have 

 but feeble locomotive power (like the crown-borer), it is recommended that 

 newly established fields be separated from old by an interval of a few rods in 

 width devoted to some other crop. 



2c. As a still greater security against such invasion from without, the 

 practice of establishing new fields at a considerable distance from the old has 

 been found especially useful. 



3. Capture axd Direct Destruction. 



Sa. For some insects infesting the strawberry field, no cheaper or no morr 

 satisfactory method can be used than that of capture and destruction by 

 hand. 



3b. Sweeping back and forth along the row with an ordinary insect net is 

 a ready means of capture available for such exposed insects as do not cling 

 closely to the plants. It may be used to advantage for those attacking the 

 flower and fruit at a time when less laborious measures are not allowable. 



3c. For species of feeble locomotive power, wdiich infest the leaves in sum- 

 mer, after the fruit has been gathered, it is a common and very useful prac- 

 tice to mow the field in dry weather, burning it over in a brisk wind after it 

 is thoroughly dry. 



M. Some of the worst in.sects which infest the strawberry api)oar in the 

 adult stage in swarms during a comi)arativcly short period, and may then be 

 entrapped by attracting them by lights exposed in the fields, and so arranged 

 that the insects ajiproaching the lights shall be caught in ves.sels of water. 

 A glass lantern .so sus])onded over a tub of water that beetles flying against 

 the gla.ss will drop into the water beneath, is a simple and effective device 

 which may be depended upon to (iqiture the May beetles and other adults of 

 the various white grubs. If the waUn* be covered with a film of kerosene, the 

 insects falling into it will be speedily killed. The especial object of this 



