Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 100 California Agricultural Extension Service [Cir. 120 iiig time many of the cluster buds fail to open at all, others open with only one or two blossoms and the bloom is Aveak, often fails to set, and frequenth drops. Tlie canse of this condition is not detectable to ordi- Fig. 50.—Pear blossoms killed by brown-rot fungus. nary observation but is believed to be the ordinary pear leaf blister mite, Eriophyes jjyri, as described in Extension Circular 87 and Circular 324.' Chlorosis, Lime-induced Chlo
Diseases of fruits and nuts Diseases of fruits and nuts diseasesoffruits120smit Year: 1941 100 California Agricultural Extension Service [Cir. 120 iiig time many of the cluster buds fail to open at all, others open with only one or two blossoms and the bloom is Aveak, often fails to set, and frequenth drops. Tlie canse of this condition is not detectable to ordi- Fig. 50.—Pear blossoms killed by brown-rot fungus. nary observation but is believed to be the ordinary pear leaf blister mite, Eriophyes jjyri, as described in Extension Circular 87 and Circular 324.' Chlorosis, Lime-induced Chlorosis.—In this disease, the leaves, either on certain limbs or the whole tree, are bright yellow and the trees more or less stunted and unfruitful. In pronounced cases of chlorosis in cer- tain soil areas, many different kinds of plants often show the trouble, although other crops may flourish and do well. The trouble referred to here is due to an excess of lime in the soil, which interferes with the ab- 25 Borden Arthur D. The pear leaf blister mite as a cause of fruit-bud injury. California Agr. Exp. Sta. Cir. 324:1-8. 3 figs. 1932. (Out of print.)
Size: 1093px × 1830px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
