-12-
29. Howard, C. M., and E. E. Albregts. 1983. Black leaf spot phase of
 strawberry anthracnose caused by Colletotrichum gloeosporioides (=C.
 fragariae). Plant Disease. 67:1144-1146.-

 Since the mid-1970's, a new leaf spot of strawberries has been found in
 summer nurseries in Florida. Isolations from the lesions consistently yielded
 a Colletotrichum sp. identical to the original description of C. fragariae.
 In inoculation tests, an isolate from a leaf lesion and an isoat'e from the
 crown of a wilted plant incited leaf spot and typical anthracnose symptoms
 on stolons and petioles.

30. Howard, C. M., and E. E. Albregts. 1984. Anthracnose of strawberry fruit
 caused by Glomerella cingulata in Florida. Plant Disease. 68:824-825.

 Glomerella. cingulata was isolated from anthracnose lesions on strawberry
 fruits. Lesions caused by G. cingulata on fruits in the field and
 inoculated fruits were ind-stinguishable from those caused by Colletotrichum
 fragriae. Conidia of G. cingulata were slightly shorter but larger in
 diameter than those rertedffor C. fragariae.

31. Maas, J. L., and C. M. Howard. 1984. Variation of several anthracnose fungi
 in virulence to strawberry and apple. Plant Disease. 69:164-166.

 Isolates of Glomerella cingulata, Colletotrichum gloeosporioides, C.
 fragariae, and dematu wereevaluated for vacation in pathogen ity
 and virulence in-stra berry stolons and fruits and apple fruits. Isolates
 of two nonstrawberry pathogens, C. trifolii and C. coccodes, were also
 included as were subcultures of naturally occurrI g colony sectors of C.
 gloeosporioides and G. cingulata from culture. Isolates of C. trifolii-were
 virulent to moderately virulent in stolons. One isolate offT. coccodes and
 several isolates of C. gloeosporioides and G. cingulata were as virulent as
 C. fragariae in stolons.

32. Howard, C. M. 1984. Black leaf spot. p 52 In Compendium of Strawberry
 Diseases, J. L. Maas, Editor. American Phytopath. Soc. St. Paul, Minn.
 138 pp.

 Black leaf spot is caused by Colletotrichum fragariae A. N. Brooks, the
 same fungus that causes anthracnose of strawberry Lants( (see. Anthracnose
 Fruit Rots; Anthracnose). In Florida, black leaf spot occurs only in the
 summer nursery and in late April and May in the winter nursery. The
 initially minute black spots enlarge to 0.5-2mm in diameter (Fig. 71).
 Although many spots may be present on individual leaflets, they do not cause
 death of the leaflets. The foliar disease usually appears only after
 anthracnose has become moderate to severe on runners and petioles. At times,
 however, black leaf spot appears first indicating that the anthracnose
 fungus is present. At the first sign of black leaf spot, approved fungicides
 should be applied according to label directions.

33. Howard, C. M. 1984. White rot. p 73. In Compendium of Strawberry Diseases,
 J. L. Maas, Editor. American Phytopath. Soc. St. Paul, Minn. 138 pp.

 White rot, reported in Florida, is caused by a fungus that has not yet been
 identified but that may be a species of Rhizoctonia. Only ripe fruits
 appear to be attacked, A large, soft, white or very light purplish area
 appears on the red fruit. The entire fruit is invaded and becomes soft with-
 in two or three days after infection is first evident (Plate 108). This
 disease occurs erratically; it seems to appear suddenly in a particular
 field, then disappears almost as suddenly.