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Home → Publications → American Chestnut Proceedings → 1982 → Attempts to Control Chestnut Blight with Slurry and Conidial Sprays of Hypovirulent Strains

Attempts to Control Chestnut Blight with Slurry and Conidial Sprays of Hypovirulent Strains

ABSTRACT.--Four field plots were established in 1978 in forested areas with high densities of native chestnut sprouts. Treatments were repeated each year for four years and consisted of mist-blowing solutions of conidia of cytoplasmic hypovirulent (CH) strains and inoculating natural cankers with slurries of CH strains. Treated areas consisted of all the sprouts within a 25 m radius. Competing hardwoods were cut or killed. Stems in the 25 to50 m radius have been monitored for control of the blight and spread of CH strains from the treated center. Data on stem survival, stem size, canker persistence, new cankers, and canker location are being obtained. Preliminary results will be presented. Inoculation with CH slurries is keeping stems alive longer. There is some evidence of the establishment of persistent cankers within the treated area as well as in the outer perimeter. However, new infections of normal strains are prevalent in both the inner treated area and the outer untreated area.


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Author(s): Richard A. Jaynes, Nancy K. DePalma

Publication: American Chestnut Proceedings - 1982