Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 546 DISEASES OF CULTIVATED PLANTS tiny mites feed not only on the outside of the bulbs, but they exist between the leaf scales of the bulb, feeding and laying their eggs in the interior, where they can scarcely be reached. The best plan is to burn infested bulbs, and the soil whence these have been removed should be disinfected. 2. Wash or spray the bulbs with paraffin, the treatment being repeated a fortnight later. 3. Wash the bulbs in sulphide of potassium (liver of sulphur),
Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 546 DISEASES OF CULTIVATED PLANTS tiny mites feed not only on the outside of the bulbs, but they exist between the leaf scales of the bulb, feeding and laying their eggs in the interior, where they can scarcely be reached. The best plan is to burn infested bulbs, and the soil whence these have been removed should be disinfected. 2. Wash or spray the bulbs with paraffin, the treatment being repeated a fortnight later. 3. Wash the bulbs in sulphide of potassium (liver of sulphur), I oz. to 3 gallons of water, or brush with this after Fig. i66.—Rhizoglyphiis echinopus, the 'bulb mite';' has destroyed the roots of a Hippeastrum bulb. removal of the outside loose scale leaves. This treatment is useful against fungi which follow the attack of the mite. 4. Fumigate with bisulphide of carbon. The bulbs to be treated should be placed in an air-tight receptacle, and a saucer, into which bisulphide of carbon has been poured, placed on the top of them. The bulbs should be left in the vapour for forty-eight hours. This treatment could be usefully extended to imported bulbs, which ought to be examined for the mite. The formula for fumigation on this larger scale is one pint of bisulphide of carbon to 1000 cubic feet of space.
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