. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 302 THE AGRICULTURAL NEWS. September 9, FUNGUS NOTES. A NEW FUNGUS ON THE GREEN SCALE. A fungus hitherto unrecorded and as yet undescribed has heen found on examples of the green scale, Coccus viridis {L^canium viride) infesting lime twigs forwarded from Montserrat to this Office for examination. Two lots of maiterial have been received from the Curator: the first collected by Mr. Morland at Olveston, the second by Mr. Robson himself. The fungus is not externally visible, but the insects are seen dead and di
. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 302 THE AGRICULTURAL NEWS. September 9, FUNGUS NOTES. A NEW FUNGUS ON THE GREEN SCALE. A fungus hitherto unrecorded and as yet undescribed has heen found on examples of the green scale, Coccus viridis {L^canium viride) infesting lime twigs forwarded from Montserrat to this Office for examination. Two lots of maiterial have been received from the Curator: the first collected by Mr. Morland at Olveston, the second by Mr. Robson himself. The fungus is not externally visible, but the insects are seen dead and discoloured at all stages of growth. Under the micrcscope the fungus is seen to be developed almost entirely within the body wall of the insect, the most character- istic feature being the presence of large numbers of pear-shaped conidia. These renew themselves by putting out a long and very slender tube, at the end of which an expansion is formed which receives the. contents of the original conidium. The tube is typically straight for the first part of its course, with a double bend, approaching tn an S near the extremity. The secondary conidium is of the same form as the first. 8ome of the conidia have been seen to have doubled their lenwth by the development of a blunt-ended cylindrical protrusion of quite definite form. At one stage abundant closely-set simple or bifurcated conidiophores bearing terminal spherical conidia have been seen arising within the body of the insect from a mat of hyphae. Specimens and sketches of the fungus have been sub- mitted to Professor R, Thaxter, of Harvard University, who has kindly replied to the effect that the fungus is of great interest, and undoubtedly a primary parasite, more nearly related to Empusa Freseiiii, Nowak. (Entoraophthorae) than to any described form. The same form was received by him from Cuba a number of years ago but was not described, and it does not seem to have been mentioned by any writer. Professor Thaxter suggests an
Size: 3087px × 810px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorgreatbritainimperiald, bookcentury1900, bookdecade1900
