SOME PROBLEMS OF CULTIVATION OF SELECTED SUBTROPICAL FRUIT CROPS UNDER MARGINAL CONDITIONS, AND RESEARCH CARRIED OUT IN ISRAEL TO SOLVE THESE PROBLEMS

1979 ◽  
pp. 19-22
Author(s):  
A. Kadman ◽  
Ch. Oppenheimer
EDIS ◽  
2020 ◽  
Vol 2020 (5) ◽  
Author(s):  
Jonathan Henry Crane ◽  
Haimanote Bayabil ◽  
Edward A. Evans ◽  
Fredy Ballen

Florida's tropical and subtropical fruit crop industries use various irrigation systems, including high-volume systems designed for irrigation and freeze protection, drip systems for herbaceous fruit crops (papaya, banana), and microsprinkler types, mainly for irrigation and fertigation. There continues to be a steady stream of potential tropical and subtropical fruit producers in Florida, many with little to no knowledge of the various types or purposes of various irrigation system that have been used successfully for the past 60 years. This new 9-page publication of the UF/IFAS Horticultural Sciences Department includes potential producers, Extension faculty and agents, and irrigation companies. Written by Jonathan Crane, Haimanote Bayabil, Edward A. Evans, and Fredy Ballen.https://edis.ifas.ufl.edu/hs1375


Ecosistemas ◽  
2018 ◽  
Vol 27 (2) ◽  
pp. 91-101 ◽  
Author(s):  
Eduardo de la Peña Alonso ◽  
Verónica Pérez Méndez ◽  
Librada Alcaraz ◽  
Jorge Lora ◽  
Nerea Larrañaga ◽  
...  

2021 ◽  
Vol 15 (1) ◽  
pp. 98-102
Author(s):  
Sh. Kh. Khurramov ◽  
A. S. Bekmuradov

The purpose of the research is studying the species composition and control measures against parasitic nematodes of wild and cultivated subtropical fruit plants of Central Asia.Materials and methods. We studied subtropical fruit crops in 198 farms and 1985 household plots located in various soil and climatic zones of over 20,675 hectares in Central Asia. The materials were collected in the autumn (September-October), spring (April-May) and summer (June-August) months in 1970–1990 by the route method. Study subjects were plant parasitic nematodes of 8 species of wild and cultivated subtropical fruit plants in the Central Asian republics. A modified Baermann funnel method was used to isolate plant nematodes from plants and soil near roots. In total, we collected and analyzed more than 5,400 plant and soil samples. To identify the species of plant parasitic nematodes, we used the Atlas of plant parasitic nematodes compiled at the Institute of Parasitology of the Russian Academy of Sciences, as well as morphometric indicators obtained according to the generally accepted De Mann formulae.Results and discussion. More than 129,000 specimens of plant parasites of 98 species were found in the studied wild and cultivated subtropical fruit crops and soil near their roots. In many farms of the Central Asian republics, we found southern root-knot nematodes, peanut root-knot nematodes, javanese root-knot nematodes, and cotton root-knot nematodes in mixed populations. In Uzbekistan, the prevalence in these crops was from 8 to 61.3%, in Tajikistan – from 78 to 98%, in Turkmenistan – from 6 to 98%, and in Kyrgyzstan – 33%. In addition to root-knot nematodes, representatives of ecto- and endoparasites of the genera Tylenchorhynchus, Merlinius, Quinisulcius, Rotylenchus, Helicotylenchus, Pratylenchus, Paratylenchus, Macroposthonia, Labocriconema and Xiphinema were parasitizing in the above subtropical cultures. Under production conditions, we tested Furadan at a dose of 40 kg/ha, Heterophos at a dose of 60 and 120 kg/ha, and Aldicarb at a dose of 40 kg/ha to control root-knot and other parasitic nematodes. Their efficacy ranged from 89 to 100%. We also used the soil solarization method developed by us, the efficacy of which was 95–98%.


Author(s):  
V. V. Кrasovsky ◽  
T. V. Cherniak ◽  
V. V. Onipko ◽  
S. V. Hapon

The information about the fruit and medicinal plant passion fruit flesh-red (Passiflora incarnata L.) is given as a potential introducer of the Forest-Steppe of Ukraine and a species that should replenish the research collection of subtropical fruit crops of the open ground of the Khorol Botanical Garden. The botanical description, bioecological characteristics, nutritional and medicinal properties and the proposed agricultural cultivation techniques are given.


EDIS ◽  
2006 ◽  
Vol 2006 (18) ◽  
Author(s):  
Jonathan H. Crane ◽  
Carlos F. Balerdi ◽  
Michael S. Orfanedes

Revised! HS-812, an 8-page fact sheet by Jonathan H. Crane, Carlos F. Balerdi and Michael S. Orfanedes, discusses the numerous varieties of tropical and subtropical fruits that can be grown in the home landscape as alternatives to citrus. This version reflects the current situation with respect to citrus disease threats and alters the recommendation for two fruit crops that are considered invasive in south Florida. Included in the Master Gardener Handbook. Published by the UF Horticultural Sciences Department, October 2005. HS 812/MG373: Tropical and Subtropical Fruit Crops for the Home Landscape: Alternatives to Citrus (ufl.edu)


Author(s):  
R. K. Jat ◽  
Mukesh Kumar ◽  
Mohan Lal Jat ◽  
Jitendra Singh Shivran

1996 ◽  
Vol 47 (1) ◽  
pp. 47 ◽  
Author(s):  
DO Huett

This review examines the prospects for manipulating the vegetative-reproductive balance in horticultural crops through nitrogen (N) nutrition. It also examines whether incorrect timing or excessive applications of N stimulate vegetative growth at the expense of reproductive growth. Productivity of horticultural crops is dependent on an adequate N status because photosynthetic capacity is dependent on leaf N content per unit area. Efficient N uptake occurs during periods of active growth and depends on active photosynthesis. Most N in exposed leaves is accumulated as protein and the uptake and conversion to protein requires a carbohydrate (CHO) supply. A feedback mechanism has been proposed from shoots to roots in the control of N uptake, because ammonium and nitrate uptake do not increase at supraoptimal concentrations. Stored CHO and nutrients support actively growing shoots and inflorescences and while vegetative and reproductive meristems compete as sinks, fruit growth depends principally on current photosynthesis. Most of the season's N uptake by deciduous trees occurs during the post-fruit maturity period in late summer and autumn in vegetative growth which is remobilized prior to leaf fall in late autumn into storage. The N is redistributed the following spring to support new season leaf and fruit growth. In sand culture studies conducted with 2-year-old peach and apple trees, an N deficiency which led to inadequate tree N reserves in winter inhibited flowering, fruit set and vegetative growth the following spring. N applied during spring is poorly assimilated. For Prunus spp., 90% of the N contained in the spring vegetative flush is derived from storage, indicating that exogenous N applications at that time are unlikely to influence that season's growth. Vegetable crops which have high growth and N uptake rates compared with tree fruit crops (maximum N uptake rate for tomato 66 kg/ha.week v. peach 1.3 kg/ha.week) rely on exogenous N and current photosynthesis to support growth. In studies where very high N rates were applied to horticultural crops, tree crops were unaffected except in citrus where yield was depressed and tree size was unaffected. The growth and yield of most vegetable crops were depressed at high N rates while at these high N rates, tomato yields were increased while vegetative growth was unaffected. Where a depression in tomato growth occurred at high N rates, it was caused by a salt effect, although chloride at the same osmotic potential depresses growth much more than nitrate. In subtropical fruit and nut crops such as lychee, macadamia and avocado, timing and rate of N were not detrimental to yield. Soil N, tree N and CHO reserves buffer against an external N supply and hence the ability of applied N to manipulate the vegetative-reproductive balance. More work is required to establish the extent and subsequent effect of competition between the vegetative flushes and inflorescence growth for subtropical fruit crops in particular.


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