. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 136 PESTS OF GARIiEX AXlJ FIELD CROPS Stalks of potato plants, frequently killing the ^ines. Its work is evident usually in midsummer. The adult is a gray snout beetle, with three black spots at the hind end of its thorax. It lays eggs just under the surface of the \'ines. and the grubs work beyond the reach of poison. Fortunately, the adults remain in the stalks over winter, and the pest is easily checked for the next season by ^emo^â ing and destrr-^ing the "vines as soon as the crop of potatoes is har
. Injurious insects : how to recognize and control them . Insect pests; Insect pests. 136 PESTS OF GARIiEX AXlJ FIELD CROPS Stalks of potato plants, frequently killing the ^ines. Its work is evident usually in midsummer. The adult is a gray snout beetle, with three black spots at the hind end of its thorax. It lays eggs just under the surface of the \'ines. and the grubs work beyond the reach of poison. Fortunately, the adults remain in the stalks over winter, and the pest is easily checked for the next season by ^emo^â ing and destrr-^ing the "vines as soon as the crop of potatoes is harvested. Xeighboring weeds also should be destroved. The. Fig. âWork of the Lima Bean .Stem-hHjrer. Uiig- inal. Lima Bean Stem-borer \Monoptilota nubiklla Hulst) In a few sections in the South the stalks of lima beans are at- tacked by a Ixirer, which bur- rows inside and catLses the for- mation of characteristic gaUs. The worm is bluish green, and nearly an inch long when ftill grown. There are probably two generations in the southern part of the insect's range. Winter is passed as larva or pupa in the soil. Fall plowing and cultivation will help to sup- press the insect. If stems show- ing the galls of the first genera- tion are removed and destroyed, the numbers of the second gen- eration should be materially reduced. The Hop-plant Borer i, Hydra- cia Grt.) The hrijvplant borer feeds at tliree chfferent points in or on l'^'the Hop-plant the \ines in the course of its Borer. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original O'Kane, Walter Collins, b. 1877. New York : The Macmillan Company
Size: 858px × 2913px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsectp, bookyear1912
