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- Author or Editor: C. D. McCarty x
- HortScience x
Abstract
No significant difference in root or top weight of 25 citrus rootstock seedlings grown in the greenhouse for 15 months was attributable to infestation of the citrus nematode, Tylenchulus semipenetrans (Cobb). Many nematodes were found on the roots of most of the cultivars tested regardless of nematode biotype, with the exception of trifoliate orange and some hybrids where one parent was trifoliate orange.
Abstract
Three-year-old seedlings of Cleopatra mandarin (Citrus reticulata Blanco) and Troyer citrang [Citrus sinensis (L.) Osbeck × Poncirus trifoliata (L.) Raf] were budded to ‘Valencia’ orange (Citrus sinensis (L.) Osbeck) at 5, 15, 30, 45, 60, and 90 cm above the ground level. Fruit yield was highest from trees budded at 15 cm height above the ground and tended to decrease as budding height increased. Nutrient concentrations in the leaves of trees were affected by the height of budding, but remained in an optimum range for maximum fruit production. The different rootstocks affected the nutrient concentrations in the leaves dramatically, but they still remained in an optimum range for maximum production of oranges.
Abstract
Ammonium sulfamate (Animate X) gave the best results for controlling resprouting of tree stumps of avocado (Persea americana Mill.).
Abstract
Three year old lemon trees [C. limon (L.) Burm f.] were selectively pruned to form a 3- to 4-scaffold branch structure for limb shaker harvesting. Yield was reduced 16 kg per tree and trunk circumference 10 cm above the bud union was reduced 5.3 cm per tree over a 6-year period. Training was completed with minimal production loss.
Abstract
Naphthaleneacetic acid (NAA) formulated as a sodium salt and as the ethyl ester applied in the spring of 1975 and 1976 to unpruned trunks of Pyracantha coccinea (Roem.) cv. Rosedale effectively controlled sprout growth. The 1% concentration of each formulation reduced growth 4 cm more than the 0.5% concentration. The control averaged 49 sprouts and treated plants ranged from 2 to 4 sprouts.
Abstract
Tree density (222-801 trees/ha) affected growth of roots in plantings of ‘Washington’ navel orange (Citrus sinensis (L.) Osbeck). Root spread, circumference, and root size were greater on wide spaced trees than on closely planted trees which had overlapping root systems. Roots of closely spaced trees were shorter in length and smaller in size.
Abstract
Trees of old-line ‘Atwood’ navel sweet orange [Citrus sinensis (L.) Osbeck] on Rubidoux trifoliate orange [Poncirus trifoliata (L.) Raf.] were planted in 1970 at 331 to 801 trees per ha to determine effects of tree spacing on growth, yield, production costs, and fruit quality. Growth measured as trunk circumference and hence fruit-bearing capacity per tree was inversely proportional to tree density but fruit yields per hectare increase with close spacing.
Abstract
Application of 1% ethyl ester of napthaleneacetic acid (NAA) in an aqueous or latex formulation to trunk and scaffold branches of pruned lemon trees [C. limon (L.) Burm.] did not affect yield during the season of application or during the year following application. Regrowth of trunk and limb sprouts was controlled for approximately 1 year.