Coffee breeding in java

Ferwerda, F. P.

doi:10.1007/bf02859068

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…In other studies, greater yields of coffee cherries have been achieved, with up to 30-40% fruit set in favourable situations (Purseglove, 1968). It is unlikely that the bushes could not 'hold' more fruit, though heavy fruit fall in the first half of the 9 month period during which cherries form has sometimes been reported (Ferwerda, 1948).…”

Section: Discussionmentioning

confidence: 99%

“…However a few flowers continue to open throughout the day, so that pollen may be available to insect foragers (and pollination may therefore continue at low frequencies) until the late afternoon. No flowers last longer than one day in a viable condition (though the stigma may remain receptive for longer periods - Ferwerda, 1948).…”

Section: Height Above Facingmentioning

confidence: 99%

“…A study of pollination mechanisms and fruitset in the new coffee plantations therefore seemed appropriate; and the findings described here may have considerable implications for lowland coffee growing in other parts of the world. C. canephora is reportedly a self-sterile, predominantly wind-pollinated crop (van Hall, 1938;Purseglove, 1968;Free, 1970;Crane & Walker, 1984), with light pollen that is borne on the wind and can thus be trapped on sticky slides within the coffee crop (Ferwerda, 1948). Insects have been said to make only a small contribution to total pollen transfer (McDonald, 1930;Purseglove, 1968).…”

Section: Introductionmentioning

confidence: 99%

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Incidence of entomophilous pollination of lowland coffee (Coffea canephora); the role of leaf cutter bees in Papua New Guinea

Willmer

Stone

1989

Entomologia Exp Applicata

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Lowland ‘robusta’ type coffee, (Coffea canephora), is a cash‐crop in many tropical countries, and is reported in the literature as primarily wind‐pollinated. The floral characteristics seem to refute this, and our evidence shows that in Papua New Guinea the flowers are classically entomophilous, being pollinated primarily by bees and flies. By far the most important and consistent visitors are solitary bees, especially Creightonella frontalis which nests within the plantations. The activity patterns and nesting biology of this bee are closely tied in with the success of the coffee bushes. Measures to improve pollination and fruit set in the coffee plantations are therefore suggested. Résumé Pollinisation du café robusta, Coffea canephora: coûts et bénéfices de la présence de Creightonella frontalis Le caf é robusta, C. canephora, est une culture de rente dans de nombreuses régions intertropicales. La littérature le considère comme essentiellement pollinisé par le vent. Les caractéristiques de la fleur semblent contredire cette opinion. Nos observations montrent qu'en Nouvelle Guinée les fleurs sont typiquement entomophiles, étant avant tout pollinisées par des abeilles et des mouches. Des abeilles solitaires qui nichent dans les plantations, en particulier C. frontalis, sont de loin les plus importants et les plus réguliers visiteurs de ces fleurs. Les caractéristiques de la biologie et le comportement de nidification de cette abeille sont intimement liés à la production des buissons de caféier. Des mesures pour favoriser la pollinisation et améliorer la production de fruit dans les plantations de café sont ainsi suggérées.

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Section: Discussionmentioning

confidence: 99%

Section: Height Above Facingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Incidence of entomophilous pollination of lowland coffee (Coffea canephora); the role of leaf cutter bees in Papua New Guinea

Willmer

Stone

1989

Entomologia Exp Applicata

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“…Although the shade impacts on arabica coffee have been widely assessed, there are few papers dealing with these impacts on robusta coffee and the possible interactive mechanisms behind them [ 38 ]. It is important to address shade effects on both arabica and robusta coffee separately, owing to differing ecology [ 53 , 54 , 55 ] and fertilisation requirements [ 56 ]. Furthermore, robusta and arabica coffee may not have the same susceptibility to pests and diseases, which might alter the interactive shade-plant health effect on coffee yield [ 26 , 57 ].…”

Section: Introductionmentioning

confidence: 99%

No Reduction in Yield of Young Robusta Coffee When Grown under Shade Trees in Ecuadorian Amazonia

Piato

Subía

Lefort

et al. 2022

Life

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Little is known on what impact shade trees have on the physiology of Coffea canephora (robusta coffee) under tropical humid conditions. To fill this gap, a field experiment was conducted in the Ecuadorian Amazon to investigate how growth, nutrition (leaf N), phenological state (BBCH-scale) and yield of 5-year-old robusta coffee shrubs are affected by the presence or absence of leguminous trees, the type (organic v conventional) and intensity of management. The experiment was a factorial 5 × 4 design with four cropping systems: intensive conventional (IC), moderate conventional (MC), intensive organic (IO) and low organic (LO), and with five shading systems in a split-plot arrangement: full sun (SUN), both Erythrina spp. and Myroxylon balsamum (TaE), M. balsamum (TIM), E. spp. (ERY) and Inga edulis (GUA). Three monthly assessments were made. Cherry yields of coffee shrubs under moderate shade (c. 25%) were similar to those under high light exposure. Coffee shrubs grown with either E. spp. or I. edulis were taller (+10%) and had higher leaf N concentrations (22%) than those grown without consistent shade. Unless receiving c. 25% of shade, coffee shrubs grown under organic cropping systems showed reduced growth (25%). No correlation was found between height, cherry yield and leaf N. Both shading and cropping systems affected leaf N concentration, also depending on phenological state and yield. Further research is needed to confirm our findings in the long-term as well as to elucidate how leguminous trees may induce physiological responses in robusta coffee under humid tropical conditions.

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Coffee Selection and Breeding

Vossen¹

1985

Coffee

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Coffee breeding in java

Cited by 13 publications

References 5 publications

Incidence of entomophilous pollination of lowland coffee (Coffea canephora); the role of leaf cutter bees in Papua New Guinea

Incidence of entomophilous pollination of lowland coffee (Coffea canephora); the role of leaf cutter bees in Papua New Guinea

No Reduction in Yield of Young Robusta Coffee When Grown under Shade Trees in Ecuadorian Amazonia

Coffee Selection and Breeding

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