Early Leaf Abscission and Folivores: Comments and Considerations

1983 ◽  
Vol 122 (3) ◽  
pp. 428-432 ◽  
Author(s):  
Desmond M. Kahn ◽  
Howard V. Cornell
Keyword(s):  
Leaf Abscission ◽  
Early Leaf Abscission

Early Leaf Abscission: A Neglected Source of Mortality for Folivores

1981 ◽  
Vol 117 (3) ◽  
pp. 409-415 ◽  
Author(s):  
Stanley H. Faeth ◽  
Edward F. Connor ◽  
Daniel Simberloff
Keyword(s):  
Leaf Abscission ◽  
Early Leaf Abscission

Leafminers, Early Leaf Abscission, and Parasitoids: A Tritrophic Interaction

Ecology ◽  
1989 ◽  
Vol 70 (5) ◽  
pp. 1219-1226 ◽  
Author(s):  
D. M. Kahn ◽  
H. V. Cornell
Keyword(s):  
Tritrophic Interaction ◽  
Leaf Abscission ◽  
Early Leaf Abscission

scholarly journals One-Sided Shift Trellising Addresses Harvest, Pest Management and Cultural Problems in Rubus

HortScience ◽  
1990 ◽  
Vol 25 (8) ◽  
pp. 852a-852
Author(s):  
Herbert D. Stiles
Keyword(s):  
Pest Management ◽  
Photosynthetic Efficiency ◽  
Upright Position ◽  
Leaf Abscission ◽  
Yield Efficiency ◽  
Horizontal Orientation ◽  
Disease Reduction ◽  
Control Procedures ◽  
Harvest Efficiency ◽  
Early Leaf Abscission

Static-V trellis increases raspberry yield, but fruiting shoots grow toward its center making harvest difficult. Shading causes early leaf abscission and it favors fungus diseases inside the V. Static training of floricanes and primocanes to opposite sides of a V trellis prevents neither harvest difficulty, nor primocane injury during harvest. In 1988-89 harvest difficulties were reduced by bloom-time shifting of floricanes on a V-trellis. Over 90% of fruiting shoots were oriented to the trellis ' exterior, but primocane shading and early leaf abscission continued. The 'bent fence' trellis was designed and tested in 1989. It shifts floricanes from horizontal orientation to an upright position on one side of a V-shaped trellis, thus retaining outward display of fruiting shoots and achieving unobstructed display of primocanes on the opposite side. Harvest efficiency, disease reduction, accurate deposition of pesticides, avoidance of solar injury (sun scald), and adaptation of mechanical pest control procedures are potentiated by this system. It also reduces impediments to studies of carbohydrate partitioning, photosynthetic efficiency, yield efficiency, and intraplant competition.

scholarly journals Performance of Nine Apple Cultivars Grown with Six Fungicide Regimes

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 675e-675
Author(s):  
Richard Marini ◽  
John Barden ◽  
Donald Sowers
Keyword(s):  
Late Summer ◽  
Leaf Abscission ◽  
Disease Symptoms ◽  
Early Season ◽  
Late Season ◽  
Sooty Blotch ◽  
Golden Delicious ◽  
Root Stock ◽  
Apple Cultivars ◽  
Early Leaf Abscission

In 1993 a factorial experiment, involving nine apple cultivars on M.9 root-stock and six fungicide regimes, was established. The cultivars included `Delicious', `Golden Delicious', `York Imperial', `Redfree', `Freedom', `Liberty', NY 74828-12, NY 73334-35, and NY 74840-1. The fungicide treatments included earlyseason sprays of Bayleton or Dodine, separately or combined, and late-season sprays of Captan plus Benomyl alone or combined with early-season sprays of Bayleton plus Dodine. Non-sprayed trees served as a control. In 1995 leaves and fruits were evaluated for disease symptoms. Leaf spot (symptoms caused by black rot or alternaria leaf blotch) was most severe on `Redfree' and NY 73334-35, and least severe on `Delicious', `Golden Delicious', and `York'. By late summer NY 74828-12 had the most leaf abscission, whereas NY 74840-1, `Liberty', and `Delicious' lost the fewest leaves. Early-season fungicide sprays did not reduce early leaf abscission. Sooty blotch and fly speck, but not rots, were nearly eliminated by late-season applications of Captan plus Benomyl. Averaged over all fungicide treatments, more than half of the fruits from `Delicious', `Redfree', and NY 74828-12 were free of disease symptoms. Cultivars with <25% of the fruits without infection included `York', `Liberty', NY 74840-1 and NY 73334-35. `York' and `Redfree' had >25% of the fruits with rots, while all other cultivars had <9% fruits with rots. `Delicious' and NY 73334-35 had the fewest rotten fruits. Rots were not controlled by any fungicide treatment. `Liberty' and NY 73334-35 had the most flyspeck and `Redfree' had the least. `Liberty', NY 74840-1 and NY 73334-35 had the most sooty blotch and `Redfree' and NY 74828-12 had the least.

scholarly journals High-Density Genetic Map Construction and Identification of QTLs Controlling Leaf Abscission Trait in Poncirus trifoliata

2021 ◽  
Vol 22 (11) ◽  
pp. 5723
Author(s):  
Yuan-Yuan Xu ◽  
Sheng-Rui Liu ◽  
Zhi-Meng Gan ◽  
Ren-Fang Zeng ◽  
Jin-Zhi Zhang ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Linkage Map ◽  
Genetic Map ◽  
Expression Patterns ◽  
High Density ◽  
Poncirus Trifoliata ◽  
Leaf Abscission ◽  
Comparative Genomic ◽  
Map Comparison ◽  
Genomic Studies

A high-density genetic linkage map is essential for genetic and genomic studies including QTL mapping, genome assembly, and comparative genomic analysis. Here, we constructed a citrus high-density linkage map using SSR and SNP markers, which are evenly distributed across the citrus genome. The integrated linkage map contains 4163 markers with an average distance of 1.12 cM. The female and male linkage maps contain 1478 and 2976 markers with genetic lengths of 1093.90 cM and 1227.03 cM, respectively. Meanwhile, a genetic map comparison demonstrates that the linear order of common markers is highly conserved between the clementine mandarin and Poncirus trifoliata. Based on this high-density integrated citrus genetic map and two years of deciduous phenotypic data, two loci conferring leaf abscission phenotypic variation were detected on scaffold 1 (including 36 genes) and scaffold 8 (including 107 genes) using association analysis. Moreover, the expression patterns of 30 candidate genes were investigated under cold stress conditions because cold temperature is closely linked with the deciduous trait. The developed high-density genetic map will facilitate QTL mapping and genomic studies, and the localization of the leaf abscission deciduous trait will be valuable for understanding the mechanism of this deciduous trait and citrus breeding.

scholarly journals De novo analysis of transcriptome reveals genes associated with leaf abscission in sugarcane (Saccharum officinarum L.)

BMC Genomics ◽  
2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Ming Li ◽  
Zhaoxu Liang ◽  
Yuan Zeng ◽  
Yan Jing ◽  
Kaichao Wu ◽  
...  
Keyword(s):  
De Novo ◽  
Saccharum Officinarum ◽  
Leaf Abscission
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