Ozone and Eusarium: effects on the growth and development of a wilt-susceptible tomato and a wilt-resistant tomato

Journal Article · Thu Jan 01 00:00:00 EST 1976 · Proc. Amer. Phytopathol. Soc.; (United States)

OSTI ID:5320139

Manning, W J; Vardaro, P M

Seedlings of tomato (Lycopersicon esculentum Mill.) cultivars Rutgers (Fusarium-susceptible) and Supersonic (Fusarium-resistant) were transplanted into 20 cm diam. pots of either steamed soil or steamed soil infested with Fusarium oxysporum f. sp. lycopersici (race 1) and grown for 45 days in 2 paired greenhouses. One contained charcoal-filtered air and the other filtered air plus ozone at 0.06-0.08 ppm for 6 hr/day 5 day/week. Slight to moderate white stippling was observed on the older leaves of all plants exposed to ozone. Fusarium wilt symptoms were noted in Rutgers plants grown in filtered air 14-18 days before they were noted in comparable plants exposed to ozone. Symptom expression and death of plants progressed more rapidly in filtered air. Ozone retarded growth and delayed wilt symptoms in Rutgers plants. Supersonic plants did not develop wilt symptoms, but fusarium significantly reduced (P=0.05) root and top dry weights of plants grown in filtered air. Plant height and root and top dry weights for Supersonic plants in Fusarium-infested soil were further significantly (P-0.05) reduced by ozone. Ozone and Fusarium, singly or together in an additive manner, significantly reduced the growth and development of a Fusarium-resistant tomato.

• Research Organization: Univ. of Massachusetts, Waltham
• OSTI ID: 5320139
• Journal Information: Proc. Amer. Phytopathol. Soc.; (United States), Vol. 3
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
FUSARIUM
INFECTIVITY
HERBS
PLANT GROWTH
SENSITIVITY
OZONE
TOXICITY
CONTROLLED ATMOSPHERES
INJURIES
ROOTS
SEEDLINGS
SYMPTOMS
SYNERGISM
TOMATOES
WEIGHT
ATMOSPHERES
FOOD
FRUITS
FUNGI
GROWTH
PARASITES
PLANTS
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)