scholarly journals Biology, morphology and damage of the lesser Coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam

2020 ◽  
Vol 21 (10) ◽  
Author(s):  
Ung Nguyen ◽  
THI-HIEN NGUYEN ◽  
NGUYEN-QUOC-KHANH CHAU ◽  
VAN-VANG LE ◽  
VAN-HAI TRAN
Keyword(s):  
Life Cycle ◽  
Genetic Study ◽  
Development Time ◽  
Biological Characteristics ◽  
Development Stages ◽  
Southern Vietnam ◽  
Control Options ◽  
Important Pest ◽  
Damage Symptoms ◽  
Average Development

Abstract. Nguyen HU, Nguyen TH, Chau NQK, Le VV, Tran VH. 2020. Biology, morphology and damage of the lesser coconut weevil, Diocalandra frumenti (Coleoptera: Curculionidae) in southern Vietnam. Biodiversitas 21: 4686-4694. The lesser coconut weevil, Diocalandra frumenti, is an emerging pest of coconut trees in Vietnam. To help develop control options for D. frumenti, this study investigated its morphological and biological characteristics, and quantified damage levels on coconut trees. Results from the study showed that attack by D. frumenti on coconut trees is correlated with characteristic damage symptoms (e.g., oozing sap) on all maturity stages of coconut fruits throughout the year (24.7% infestation), with higher damage levels on young fruits (57.6%). Results also showed that infestation levels on trees (58.9%), coconut bunches (19.4%), and fruits (7.77%) varied greatly. Adults have four different morphologies, but genetic study showed that they are all one species. The life cycle from egg to adult averaged 167± 34.3 days. The average development time for eggs, larvae, female pupae, male pupae, male adults, and female adults was 5.62 ± 0.62, 142.3 ± 34.3, 9.79 ± 0.86, 10.2 ± 1.26, 81.5 ± 34.7, and 81.8 ± 37.2 days, respectively. In conclusion, D. frumenti is an important pest in coconut trees with significant fluctuations in the duration of its development stages, and variation in shape, color, and size of the eggs, larvae, pupae, and adults. They can attack any coconut orchard and have harmful impacts on coconut trees, coconut bunches, and fruits throughout the year.

scholarly journals Studi Biologi Hama Kutu Putih Pepaya Paracoccus marginatus Williams & Granara de Willink (Hemiptera: Pseudococadea)

AGRICA ◽  
2020 ◽  
Vol 4 (2) ◽  
pp. 127-133
Author(s):  
Gregorius O Leta ◽  
Yustina Maria Silvia Wonga Puu ◽  
Imaculata Fatima
Keyword(s):  
Life Cycle ◽  
Development Time ◽  
Adult Stage ◽  
Egg Laying ◽  
Development Phase ◽  
Female Adult ◽  
Male Adult ◽  
Average Fecundity ◽  
Average Development

The goal of this research was to understand the biology of P. marginatus, a common pest for papaya plants.  This research used 1 type of treatment which was repeated 10 times. The results of this research were intended to illustrate the average development time of each development phase of P. marginatus.  These phases were: the egg phase (6 days), the female nymph phase (10 days),  the male nymph phase (17 days), female adult stage (11 days), male adult stage (3 days).  On average, the female life cycle was 27 days, and the male life cycle was 26 days.  On average, the pre-fertile stage lasted 4 days, the fertile stage lasted 6 days and the post fertile stage lasted 1 day. On average the pre-egg-laying adult stage lasted 4 days, the egg-laying adult stage lasted 6 days and the post-egg-laying stage lasted 1 day.  After the egg-laying stage, the average fecundity of P. marginatus was 370 eggs per female and from these, a total of 350 offspring were hatched per individual.  The ratio of surviving Descendents to reproductive couples of P. marginatus white lice was 9:1.

scholarly journals One Century of Study: What We Learned about Paracoccidioides and How This Pathogen Contributed to Advances in Antifungal Therapy

2021 ◽  
Vol 7 (2) ◽  
pp. 106
Author(s):  
Erika Seki Kioshima ◽  
Patrícia de Souza Bonfim de Mendonça ◽  
Marcus de Melo Teixeira ◽  
Isis Regina Grenier Capoci ◽  
André Amaral ◽  
...  
Keyword(s):  
Latin America ◽  
Life Cycle ◽  
Antifungal Activity ◽  
Molecular Biology ◽  
Antifungal Therapy ◽  
High Toxicity ◽  
Development Stages ◽  
Thioredoxin System ◽  
Nanostructured Systems ◽  
Advanced Development

Paracoccidioidomycosis (PCM) is a notable fungal infection restricted to Latin America. Since the first description of the disease by Lutz up to the present day, Brazilian researchers have contributed to the understanding of the life cycle of this pathogen and provided the possibility of new targets for antifungal therapy based on the structural and functional genomics of Paracoccidioides. In this context, in silico approaches have selected molecules that act on specific targets, such as the thioredoxin system, with promising antifungal activity against Paracoccidioides. Some of these are already in advanced development stages. In addition, the application of nanostructured systems has addressed issues related to the high toxicity of conventional PCM therapy. Thus, the contribution of molecular biology and biotechnology to the advances achieved is unquestionable. However, it is still necessary to transcend the boundaries of synthetic chemistry, pharmaco-technics, and pharmacodynamics, aiming to turn promising molecules into newly available drugs for the treatment of fungal diseases.

scholarly journals Biological aspects of Hylesia metapyrrha (Lepidoptera; Saturniidae; Hemileucinae), in laboratory

2007 ◽  
Vol 67 (1) ◽  
pp. 173-177 ◽  
Author(s):  
A. Specht ◽  
AC. Formentini ◽  
E. Corseuil
Keyword(s):  
Life Cycle ◽  
Incubation Period ◽  
Adult Stage ◽  
Immature Stages ◽  
Average Period ◽  
Development Stages ◽  
Behavioral Aspects ◽  
Biological Aspects ◽  
Guava Leaves

The aim of this work was to study biological aspects and the life cycle of Hylesia Metapyrrha in a laboratory. Laboratorial breeding was made at 25 ± 1 °C, 70 ± 10% UR and 14 hours of photophase, feeding the larvae with guava leaves (Psidium guayava L. - Myrtaceae). Time was evaluated on the days of all the development stages; morphometry was evaluated in millimeters and the pupa’s mass in grams. The eggs were disposed in groups and covered by urticating abdominal hair. The incubation period lasted 52 days. The larvae, with gregarious habits, presented background black coloration, yellowish scoli and two orange longitudinal lines above and below the spiracles, during the development which lasted an average period of 74.59 days and went through seven instars. The pre-pupa and the pupa stages lasted on average 8.82 and 50.56 days, respectively; the female pupae presented a duration, weight and size which was significantly bigger. The adult stage lasted on average 5.50 days with periods of pre, post and oviposition of 2.30, 1.90 and 1.00 days, respectively. This study broadens the knowledge of the immature stages, biological, morphological and behavioral aspects, until then restricted to the morphology and to registers of the occurrence of the adult forms.

Defining Product Architecture During Conceptual Design

1998 ◽  
Author(s):  
Kevin R. Allen ◽  
Susan Carlson-Skalak
Keyword(s):  
Life Cycle ◽  
Product Development ◽  
Conceptual Design ◽  
Development Time ◽  
Product Variety ◽  
Product Architecture ◽  
Small Company ◽  
Product Lines ◽  
Modular Product ◽  
Modular Products

Abstract Product architecture can have a significant impact on a product’s life-cycle and its development time. Modular product architecture allows for easy disassembly upon product retirement and allows for wide product variety. In a small company, the team structure of the company can correspond to the modules, and modules can be used across product lines. By using similar modules from one generation to the next, product development time can be reduced. The methodology described in this paper gives a small company the framework from which to develop modular products.

Pratylenchus in sugarcane: a diminishing problem?

2021 ◽  
pp. 66-72
Author(s):  
Prabashnie Ramouthar
Keyword(s):  
South Africa ◽  
Life Cycle ◽  
Host Range ◽  
Geographical Distribution ◽  
Economic Importance ◽  
Nematode Management ◽  
Pratylenchus Brachyurus ◽  
Damage Symptoms

Abstract This chapter focuses on the economic importance, host range, geographical distribution, damage symptoms and biology and life cycle of Pratylenchus brachyurus, P. neglectus, P. scribneri and P. zeae infesting sugarcane in South Africa. Information on their interactions with other nematodes and pathogens, the efficacy and optimization of some recommended integrated nematode management programmes and future nematode research requirements are also presented.

The soybean cyst nematode: pervasive and destructive to soybean production in the mid-western United States.

2021 ◽  
pp. 117-124
Author(s):  
Gregory L. Tylka
Keyword(s):  
United States ◽  
Life Cycle ◽  
Soybean Cyst Nematode ◽  
Plant Pathogens ◽  
Management Practices ◽  
Heterodera Glycines ◽  
Economic Importance ◽  
Cyst Nematode ◽  
Future Outlook ◽  
Damage Symptoms

Abstract This chapter focuses on the economic importance, host range, geographical distribution, damage symptoms and biology and life cycle of the soyabean cyst nematode, Heterodera glycines, a pervasive and destructive pest to soyabean production in the mid-western USA. Some information on its interaction with other plant pathogens, the efficacy and optimization of some recommended integrated nematode management practices and future outlook and research requirements are also presented.

Fasciola gigantica and Fasciola hybrids in Southeast Asia.

2021 ◽  
pp. 423-460
Author(s):  
Nichola Eliza Davies Calvani ◽  
Jan Šlapeta
Keyword(s):  
Life Cycle ◽  
Southeast Asia ◽  
Smallholder Farmers ◽  
Economic Importance ◽  
Fasciola Gigantica ◽  
Rice Fields ◽  
Control Options ◽  
And Control

Abstract This book chapter describes the life cycle of F. gigantica and its differences from F. hepatica, including its economic importance and control options available, with particular emphasis on the importance of the smallholder farmers and the role of rice fields in maintaining the life cycle in Southeast Asia.

Improving the management of plant parasitic nematodes in banana: integration of technologies and responding to the demand of the consumers and markets.

2021 ◽  
pp. 159-166
Author(s):  
Luis Ernesto Pocasangre Enamorado
Keyword(s):  
Life Cycle ◽  
Integrated Management ◽  
Economic Importance ◽  
Future Research ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Future Developments ◽  
Management Optimization ◽  
Damage Symptoms ◽  
Plant Parasitic

Abstract This chapter discusses the economic importance, geographical distribution, host range, damage symptoms, biology and life cycle, interactions with other nematodes and pathogens, recommended integrated management, and management optimization of Radopholus similis infesting bananas. Future research requirements and future developments are also mentioned.

Mitigating a galling problem in California's carrot production.

2021 ◽  
pp. 284-289
Author(s):  
J. Ole Becker
Keyword(s):  
Life Cycle ◽  
Host Range ◽  
Geographical Distribution ◽  
Meloidogyne Incognita ◽  
Integrated Management ◽  
Economic Importance ◽  
Future Research ◽  
Future Developments ◽  
Management Optimization ◽  
Damage Symptoms

Abstract This chapter discusses the economic importance, geographical distribution, host range, damage symptoms, biology and life cycle, interactions with other nematodes and pathogens, recommended integrated management, and management optimization of Meloidogyne incognita infesting carrots in California, USA. Future research requirements and future developments are also mentioned.

scholarly journals An Analytical Model of Tourist Destination Development and Characteristics of the Development Stages: Example of the Island of Bornholm

2019 ◽  
Vol 11 (24) ◽  
pp. 6989
Author(s):  
Adam R. Szromek
Keyword(s):  
Sustainable Development ◽  
Life Cycle ◽  
Business Models ◽  
Logistic Function ◽  
Tourist Industry ◽  
Tourist Destination ◽  
Tourist Attractions ◽  
Development Stages ◽  
Stage Of Development ◽  
The 1960S

This paper presents the basis of the tourism area life cycle (TALC) concept and its extension in the context of the implementation of sustainable development practices in the tourist business model. The author uses the logistic function to determine the level of tourist absorption and capacity. The empirical basis of the methods used was statistics on the development of the tourist industry on Bornholm. The objective of the paper is to determine the stage of development of the tourist area of Bornholm and the consequences of this stage for business models of tourist enterprises functioning there. The results of the analysis indicate that the range of tourist absorption was reached in the 1960s–1970s, and that it is currently getting closer to the upper threshold of that range. Tourism on Bornholm, in line with the TALC concept, is currently in the stabilization stage. Future tourist trends on Bornholm depend on many factors; however, if tourist development goes into the decline stage, the offered products may require transformation, in terms of both transport and the form and availability of tourist attractions. Perhaps this will involve a total transformation of the island into a facility with a specific entertainment, leisure, or business profile. The listed solutions will require entrepreneurs to react within the scope of a transformation of their business models into sustainable models of tourist business.

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