Population dynamics, native parasitoids and incidence of Tephritidae (Insecta, Diptera) in cherimoya (Annona cherimola mill.) secondary forests at Southern Ecuador

2020 ◽  
pp. 1-8
Author(s):  
Cristian Minga ◽  
Marina Mazón ◽  
Henry Troya
Keyword(s):  
Population Dynamics ◽  
Secondary Forests ◽  
Native Parasitoids ◽  
Annona Cherimola ◽  
Southern Ecuador

scholarly journals Population Dynamics of Native Parasitoids Associated with the Asian Chestnut Gall Wasp (Dryocosmus kuriphilus) in Italy

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Tiziana Panzavolta ◽  
Francesco Croci ◽  
Matteo Bracalini ◽  
George Melika ◽  
Stefano Benedettelli ◽  
...  
Keyword(s):  
Biological Control ◽  
Population Dynamics ◽  
Pest Control ◽  
Climatic Conditions ◽  
Strong Fluctuation ◽  
Gall Wasp ◽  
Dryocosmus Kuriphilus ◽  
Native Parasitoids ◽  
Parasitism Rates ◽  
Indigenous Parasitoids

Native parasitoids may play an important role in biological control. They may either support or hinder the effectiveness of introduced nonnative parasitoids released for pest control purposes. Results of a three-year survey (2011–2013) of the Asian chestnut gall wasp (ACGW) Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae) populations and on parasitism rates by native indigenous parasitoids (a complex of chalcidoid hymenopterans) in Italian chestnut forests are given. Changes in D. kuriphilus gall size and phenology were observed through the three years of study. A total of 13 species of native parasitoids were recorded, accounting for fluctuating parasitism rates. This variability in parasitism rates over the three years was mainly due to the effect of Torymus flavipes (Walker) (Hymenoptera: Torymidae), which in 2011 accounted for 75% of all parasitoid specimens yet decreased drastically in the following years. This strong fluctuation may be related to climatic conditions. Besides, our data verified that parasitoids do not choose host galls based on their size, though when they do parasitize smaller ones, they exploit them better. Consequently, ACGWs have higher chances of surviving parasitism if they are inside larger galls.

scholarly journals Floristic Groups, and Changes in Diversity and Structure of Trees, in Tropical Montane Forests in the Southern Andes of Ecuador

Diversity ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 400
Author(s):  
Oswaldo Jadán ◽  
David A. Donoso ◽  
Hugo Cedillo ◽  
Fernando Bermúdez ◽  
Omar Cabrera
Keyword(s):  
Spatial Correlation ◽  
Minor Role ◽  
Monthly Precipitation ◽  
Secondary Forests ◽  
Ecological Interactions ◽  
Montane Forests ◽  
Tropical Montane Forests ◽  
Southern Ecuador ◽  
A Minor

Composition, diversity, and structure of trees in tropical montane forests are responsive to ecological gradients and local succession. Those parameters are a result of ecological interactions between vegetation, environment, and location. This study identified floristic groups on mainly secondary forests and evaluated how the composition, diversity, and structure of trees correlate with climate, soil, and age since abandonment. We included in our models a measurement of spatial correlation, to explore the role of dispersion. For this purpose, we measured diameter and height of all trees with DBH ≥ 10 cm, in twenty-eight 500 m2 plots, in an elevation range between 2900 and 3500 m. We found 14 indicator species in three floristic groups. Group composition was explained by age since abandonment, which showed strong succession effects. Mean monthly precipitation and Manganese, but not spatial correlation, explained plant composition in these montane forests, suggesting a minor role of dispersion. Species richness and structure of the arboreal vegetation were influenced by interactions between age, precipitation, and soil nutrients concentration. We concluded that in fragmented landscapes, within the rugged region of southern Ecuador, it is possible to find different floristic groups that encompass high variation in their composition.

EDAPHOCLIMATOLOGICAL STUDY OF CHERIMOYA (ANNONA CHERIMOLA MILL.) IN LOJA PROVINCE, SOUTHERN ECUADOR

1999 ◽  
pp. 71-90
Author(s):  
L. Bydekerke ◽  
E. Van Ranst ◽  
X. Scheldeman ◽  
P. Van Damme
Keyword(s):  
Annona Cherimola ◽  
Southern Ecuador

Altered resource availability and the population dynamics of tree species in Amazonian secondary forests

Oecologia ◽  
2009 ◽  
Vol 162 (4) ◽  
pp. 923-934 ◽  
Author(s):  
Lucas Berio Fortini ◽  
Emilio M. Bruna ◽  
Daniel J. Zarin ◽  
Steel S. Vasconcelos ◽  
Izildinha S. Miranda
Keyword(s):  
Population Dynamics ◽  
Resource Availability ◽  
Tree Species ◽  
Secondary Forests

scholarly journals Effectiveness of the arbuscular mycorrhizal fungi use in the cherimoya (Annona cherimola Mill.) seedlings growth

2017 ◽  
Vol 66 (2) ◽  
Author(s):  
William Viera ◽  
Diego Campaña ◽  
Salomé Castro ◽  
Wilson Vásquez ◽  
Pablo Viteri ◽  
...  
Keyword(s):  
San Francisco ◽  
Mycorrhizal Fungi ◽  
Dry Matter ◽  
Arbuscular Mycorrhizal ◽  
Sorghum Vulgare ◽  
Annona Cherimola ◽  
Southern Ecuador ◽  
Trap Plants ◽  
Northern Peru ◽  
Poor Fertilization

Cherimoya (Annona cherimola Mill.) is native to the inter-Andean valleys of southern Ecuador and northern Peru. In Ecuador, the yield of this fruit crop is low, mainly due to agricultural management problems and poor fertilization. This research aims to assess the effect of native mycorrhizal fungi on seedling growth of cherimoya (cultivar 'Cangahua'). Sampling of soil and roots was carried out in 14 production sites of cherimoya. Soils that obtained the largest number of spores and greatest percentage of mycorrhizal colonization were those collected in Tumbabiro (plot 10), Gonzanamá, Paute and San Francisco de Atahualpa. These soils were used to propagate the inoculums in trap plants (Sorghum vulgare) and subsequently, they were used to inoculate the seeds and seedlings of cherimoya. There was no statistical difference to jointly analyze the results obtained in the inoculated seeds and seedlings. However, independently, the inoculum coming from the soil of Tumbabiro obtained the best results by doubling the content of total phosphorus and 47% increase in dry matter in cherimoya seedlings compared to control.

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