Articles
SOME AGRONOMIC AND PATHOLOGICAL CRITERIA AFFECTING TOMATO YIELD IN THE BLACK-SEA REGION OF TURKEY
Article number
635_20
Pages
159 – 164
Language
English
Abstract
As a result of the plant density experiments, the relationship between yield and plant density were described as Y = -9E – 05X2 + 1.1747X + 4882.8 (R2 = 0.66) for tomato cultivar SC2121, as Y = -0.0002X2 + 1.6202X + 4548.7 (R2 = 0.79) for tomato cultivar H2274, and as Y = -0.0001X2 + 1.4658X + 4632.4 (R2 = 0.74) for both cultivars.
It was concluded that 2500 plants per decare (1000 m2) was the best plant density for the highest yield.
According to mulching studies on the tomato cultivar SC2121, the most economical treatment was to plant the tomatoes on the 15th of April combined with black polyethylene mulch, and without covering with small plastic tunnels.
This treatment increased total and early yield respectively 1.4 and 22.6 fold as compared with the conventional growing system.
An early and severe outbreak of late blight, caused by Phytophthora infestans (Mont.) de Bary, did not affect yield during the first and second harvest period immediately after the epidemic started, but important yield losses were observed during the following harvests.
Nevertheless, it was concluded that it was not necessary to apply chemicals, even if epidemic conditions were favorable, after the third week of August.
The equation Y = 7084 – 5184r (R2 = 0.77) for the period in which epidemic started between the last week of August and mid-September and the equation Y = 6947 – 15046r (R2 = 0.95) for the other growing periods were established between apparent infection rate (r) and yield loss (Y).
It was concluded that 2500 plants per decare (1000 m2) was the best plant density for the highest yield.
According to mulching studies on the tomato cultivar SC2121, the most economical treatment was to plant the tomatoes on the 15th of April combined with black polyethylene mulch, and without covering with small plastic tunnels.
This treatment increased total and early yield respectively 1.4 and 22.6 fold as compared with the conventional growing system.
An early and severe outbreak of late blight, caused by Phytophthora infestans (Mont.) de Bary, did not affect yield during the first and second harvest period immediately after the epidemic started, but important yield losses were observed during the following harvests.
Nevertheless, it was concluded that it was not necessary to apply chemicals, even if epidemic conditions were favorable, after the third week of August.
The equation Y = 7084 – 5184r (R2 = 0.77) for the period in which epidemic started between the last week of August and mid-September and the equation Y = 6947 – 15046r (R2 = 0.95) for the other growing periods were established between apparent infection rate (r) and yield loss (Y).
Authors
A. Apaydin
Keywords
tomato yield, Phytophthora infestans, plant density
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