. Pea aphis.: (Macrosiphum pisi cultivator. The lice arehrushed from the plants with DOUghs ofpine with their leaves on. and acultivator then follows down the rows as soon afterward ble. For the perfect BUCCeSB of this method it should he practiced in the h< Ithe day, when the ground is dry and hot, ami the repetition of thehrushing is necessary every three to seven days until the crop is ready A6 49 8 for picking. Such lice as are not buried in the ground by the cultivatorwill be killed by the dust which closes their breathing pores, while aconsiderable proportion is destroyed also
. Pea aphis.: (Macrosiphum pisi cultivator. The lice arehrushed from the plants with DOUghs ofpine with their leaves on. and acultivator then follows down the rows as soon afterward ble. For the perfect BUCCeSB of this method it should he practiced in the h< Ithe day, when the ground is dry and hot, ami the repetition of thehrushing is necessary every three to seven days until the crop is ready A6 49 8 for picking. Such lice as are not buried in the ground by the cultivatorwill be killed by the dust which closes their breathing pores, while aconsiderable proportion is destroyed also by the force of the method has the advantage of not being so destructive to the naturalenemies as other means that might be employed, the aphis being morefragile and delicate than any of its insect enemies. Moreover, peasplanted in rows to permit of frequent cultivation suffer much less injurythan when sown broadcast. As soon as the last picking has been madeinfested plants should be promptly destroyed by plowing Fig. 5.—Field of peas saved by brush-and-oultivator method, showing implements used. The brush-and-pan method.—A method which consists in jarring theaphides from the vines into specially prepared, long, shallow pans inwhich a little kerosene is floating, dragged between the rows, has givengood results, the insects as they come into contact with the kerosenebeing all killed. A bushel of lice was caught to each row, 125 rodslong, in one instance where this remedy was used. It is practicableonlj for small areas. •We have abundant testimony to the value of this method, but perhaps nonemore striking than that on the farm of Mr. C. H. Pearson, a Maryland pea-grower. During the season of 1900, a 600-acre pea plantation was practicallysaved by this method. After other means had failed, the fields were brushedand cultivated every third day for a period of two weeks. The previous seasonpeas over the same area were sown broadcast; so that it was impos
Size: 1866px × 1340px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidpeaaph00usde, bookyear1909
