摘要:

Twelve‐year‐old ‘Sundrop’ apricot(Prunus armeniacaL.) trees were treated with a single soil application of paclobutrazol (PBZ) at the rate of 2, 4, and 6 g of active ingredient per tree. The chemical was applied as a trunk drench. Regardless of rate, PBZ treated trees had significantly reduced most vegetative growth characteristics and pruning requirements as compared with control trees. A rate of 2 g PBZ/tree effectively controlled vegetative growth for 3 years. Bioassay with broad bean(Vicia fabaL.) confirmed that PBZ was still present in the treated soil almost 3 years after application. The extent of growth suppression of the indicator plants was in direct relation to the treatment rate.

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513905

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

The flowering of 32 New Zealand chestnut(Castaneaspp.) selections and introduced cultivars, growing in the Waikato region of New Zealand, was monitored over three consecutive seasons. Dates of anthesis and stigma emergence and expansion were noted, and a range of early‐late flowering chestnuts identified. For the important New Zealand commercial selections ‘1002’, ‘1005’, ‘1007’, ‘1011’, and ‘1015’, the timing of the optimum pollination period was assessed using a time‐sequence bagging trial and estimated to have occurred from c.l to lOJanuary 1994. This was later than most pollen release and may help explain the low and variable levels of nut production often observed in the field. Nut production generally increased with the length of time for which stigmas were exposed for open pollination. In selection ‘1005’, exposure for 1 week was too short for any successful pollination to occur. A single application of hydrogen cyanamide (Hicane®) at 3% a.i. on 10 August 1993 advanced the time of leaf emergence and the time of flowering in all five New Zealand chestnut selections tested.

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513906

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Actinidia erianthaBenth. usually flowers in late spring on shoots that develop from buds initiated during the previous growing season. Documented here is the occurrence of secondary floral shoots in summer on both male and female vines. Those summer shoots were produced by “new” buds initiated during the current growing season. A series of sequential shoot tip removals, to force the most distal developing buds, showed that those secondary floral shoots could be induced when the primary shoots were tipped as early as late November (late spring).

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513907

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

Surface areas of fruits and vegetables are often estimated by assuming that they resemble a shape from which surface area can be mathematically calculated. Two such models, sphere and ellipsoid, were compared to three alternative approaches for estimating surface areas of apple fruit(Malus domesticaBorkh.) of four cultivars ('Royal Gala’, ‘Braeburn’, ‘Red Delicious’, and ‘Granny Smith'). Sphere and ellipsoid models underestimated actual surface area by 15 and 18%, respectively, with poor correlation between predicted surface area and actual surface area (estimated by measuring the area of adhesive tape required to cover the fruit surface). A method based on finite elements marginally overestimated surface area but reliably predicted surface area of small ‘Royal Gala’ and ‘Braeburn’ apples and had reasonably close correlation with actual surface area. Non‐linear regression models, developed from the very strong correlation between actual surface area and both fruit mass and volume, were the most accurate predictors of fruit surface area of the methods tested.

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513908

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

摘要:

‘Red Rascal’ is an attractive, oval‐shaped, bright red‐skinned potato(Solanum tuberosumL.) cultivar with white flesh. It is mid‐late season maturing and is suitable for prepack/ fresh market sales. This cultivar has shown high resistance to powdery scab(Spongospora subterranea)and late blight(Phytophthora infestans).

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513909

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513910

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor

ISSN:0114-0671    

DOI:10.1080/01140671.1995.9513911

出版商:Taylor & Francis Group    

年代:1995

数据来源: Taylor