. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. MITES 545 to the roots of the vine. This mite has been distributed all over the world in its food plants. The indications of its presence are: arrest of growth; the leaves becoming yellow : failure to produce flowers; reddish- brown spots on the bulb-scales, indicating places where the mites have been feeding. There was at one time some difference of opinion as to whether the mite was the primary cause of injury to the bulbs infested with it. It was thou
. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. MITES 545 to the roots of the vine. This mite has been distributed all over the world in its food plants. The indications of its presence are: arrest of growth; the leaves becoming yellow : failure to produce flowers; reddish- brown spots on the bulb-scales, indicating places where the mites have been feeding. There was at one time some difference of opinion as to whether the mite was the primary cause of injury to the bulbs infested with it. It was thought that the injury might be due. Fig. 165.—Left-hand fig., gooseberr}' red spider (Biyobia ribis, Thomas). Right-hand fig., eucliaris mite, bulb mite, etc. [rhizo- glyphns echinopiis). in the first instance to some error of treatment, and that the mites were simply feeding on the more or less decayed portions. It has, however, been definitely proved by Michael that the mites are the primary cause of injury, and that indeed they prefer sound bulbs. The base of the bulb and the roots are most frequently attacked, and the mites can often be seen in large numbers in the injured ' cushion ' of the bulb when a magnifying-glass is used. The mites are very minute, some- times not more than one-twentieth of an inch in length; they are yellowish-white in colour, with just a suffusion of pink, the legs and rostrum are red. The following remedial measures are given in Leaflet No. 136, Board of Agriculture and Fisheries:— I. This pest is very difficult to combat because the extremely 2 M. 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 Massee, George, 1850-1917. New York : Macmillan
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Keywords: ., bookpublishernewyorkmacmillan, booksubjectplantdis, bookyear1910
