. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 41 The spots are most conspicuous on the pods, and hence the disease > sometimes termed "; The fungus working- in the diseased areas finally penetrates through the wall of the pod into the seeds. Here it remains in a more or less inactive condition until the seed is sown When it becomes active and forms the starting point of the disease. The seedlings from such attacked seeds will often show the spots on the seed-leaves. Once spores begin to be formed the disease spreads rap
. Insects affecting vegetables [microform]. Légumes; Vegetables; Insect pests; Insectes nuisibles. 41 The spots are most conspicuous on the pods, and hence the disease > sometimes termed "; The fungus working- in the diseased areas finally penetrates through the wall of the pod into the seeds. Here it remains in a more or less inactive condition until the seed is sown When it becomes active and forms the starting point of the disease. The seedlings from such attacked seeds will often show the spots on the seed-leaves. Once spores begin to be formed the disease spreads rapidly. Treatment: Since the disease originates with infected seed, the most important point is to secure, if possible, clean seed. This can be. Fig. 51. Leaf of Beet attacked by Leaf- spot Fungus (Cercospora beficota). obtained by gathering it from pods which are free from spots, the dis- ease, as far as is known, only infecting the seed through the pod. Although seeds that are badly attacked may be readily recognised by their discolored areas, hand-sorting of such seed previous to sowing is practically valueless, as a large percentage of the apparently healthy ones will contain the fungus. Treating the seed with formalin is also useless. Care should be taken not to work amongst the plants when they are wet with rain or dew since it is at this time that the spores are. 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 Bethune, Charles J. S. (Charles James Stewart), 1838-1932; Ontario. Dept. of Agriculture. Toronto : Dept. of Agriculture
Size: 1130px × 2211px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubj, booksubjectinsectpests
