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Bioecology of the globular mealybug Pollinia pollini (Asterolecaniidae) on olive tree in North of Tunisia

 

NACEUR GHARBI1

 

1Olive Tree Institute, 286, El Mahrajene City, 1082 Tunisia

 

Abstract - This work was carried out for two years (2016 and 2017) on some bio-ecological aspects of the globular mealybug Pollinia pollini (Costa) (Hemiptera: Asterolecanidae), one of the most important bioagressor infesting olive trees in North of Tunisia. The aim of this work is to study geographical distribution and natural enemies as well as population dynamics of P. pollini. The study revealed that globular mealybug is bivoltine with imaginal hibernation. The scale insect is active in spring and summer. The scale insect was always more abundant on the sunny exposed areas of the trees, the South side (28.6%) and East side (20.7%). We noted the absence of parasitoid species and the presence of six predators species that attacked P. pollini in Tunisia: five ladybugs: Chilocorus bipustulatus L., Exochomus quadripustulatus L., Scymnus seriacus Mars., Coccinella septempunctata and Pullus mediterraneus KHN and one lacewing: Chrysoperlla carnea Steph.

Additionally, this study revealed a strong relationship between the olive bark beetle Phloeotribus scarabaeoides damage and P. pollini infestation (R2=0.877).

Keywords: Antagonists, globular mealybug, Pollinia pollini, population dynamics, Tunisia, scale insect

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Confirmation of the microbiological lifespan of meat-products: turkey ham and smoked dried meat

Validation de la durée de vie microbiologique : essais sur des produits de charcuterie « jambon de dinde » et « viande séchée fumée »

 

W. OUESLATI1

S. AYED1

F. SOUISSI1

S. ZRELLI1 

A. ETTRIQUI1

 

1 Laboratory of Food Microbiology, National School of Veterinary Medicine of Sidi Thabet, University Manouba, Tunisia (LR14AGR03).



Abstract - The aim of our work is to validate the microbiological lifespan of two deli meats, vacuum-packed and refrigerated, represented by "Turkey ham" and "Smoked dried meat". Our study is based on an aging test carried out in the form of a series of microbiological analyzes on 50 samples of the two cold meats, 20 samples of "Turkey ham" and 30 samples of "Smoked dried meat". For each dish, a batch analysis of 5 samples was carried out over time horizons at two storage temperatures according to the following distribution: 

- Storage at 4 ° C for the horizons D0 and D21 (case of ham) and D0, D21 and D42 (case of dried meat).

- Storage at 8 ° C for the horizons D42 and D60 (in the case of ham) and D61, D90 and D120 (in the case of dried meat).

Our work shows that the turkey ham product could benefit from a 60-day Use by date (UBD) thanks to the compliance of the results with the microbiological standards. In addition, the smoked dried meat product could benefit of 42 days UBD only and not of 120 days which is the duration requested due to exceeding the standard at D60 in terms of the process hygiene criterion relating to enumeration Anaerobic Sulfito-Reducing (ASR) germs. In addition, the sensory examination shows that a sour smell emerges from the dried meat from D60.

Keywords: Turkey ham, Dried smoked meat, Salmonellasp, Listeria monocytogenes, Anaerobic Sulfito-Reducers, Microflora Aerobic Mesophilic Total and E. coli.

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Territorial inequality in the Governorate of Kasserine; highlighting through the analysis of regional development indicators in west-central Tunisia

L’inégalité territoriale dans le Gouvernorat de Kasserine ; une mise en évidence à travers l’analyse des indicateurs régionaux de développement du centre-ouest de la Tunisie

 



NADIA OUNALLI1

RIADH BECHIR2

 



 Chercheuse agroéconomiste à l’Institut de Recherche Agronomique de Tunis, et à l’Institut des Régions Arides Médenine (IRA), Rue hedi Karray, 2049 Ariana, Tel : 0021671230024 ;

2 Chercheur agroéconomiste à l’Institut des Régions Arides de Médenine (IRA), Laboratoire LESOR Institut des Régions Arides Fjè, 4119 Médenine, Tunisie, Tel : 00216 75633005 ;



Abstract - In spite of the development effort in Tunisia, problems of regional disparity regional development are identified. This problem is very important comparing north regions to interior regions like Kasserine governorate. In Kasserine, a developmental delay is recorded particularly in rural areas. In this context, we need to elaborate regional indicators of sustainable development. This work aims to study the notion of indicators of sustainability and territorial disparities that may exist between delegations in this region. To this end, a data analysis applied to a set of regional development indicators using the principal components analysis method (PCA) was conducted.

Keywords: Sustainable development, sustainability indicators, Kasserine governorate, Tunisia

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Integration of rural women into territorial dynamics: reflections on an experiment of creation of an agricultural development women's group "Hrayer El Khmara" Mahdia Governorate

Intégration de la femme rurale dans une dynamique territoriale : des éléments de réflexion sur une expérience de création d’un groupement féminin de développement agricole « Hrayer El Khmara » Gouvernorat de Mahdia

 

LAMIA ARFA1

NADIA OUNALLI2

MANEL HEDHLI3

 

1Dr agroéconomiste, Université de Carthage, Institut National Agronomique de Tunis, Laboratoire d’Economie Rurale- Institut National de Recherche Agronomique de Tunis, (lamia.arfa@gmail.com)

2Dr agroéconomiste, Université de Carthage, Institut National de Recherche Agronomique de Tunis, Laboratoire d’Economie Rurale, (nediaounalli@gmail.com)

3Ingénieur agroéconomiste, (manel.hedhli@hotmail.com)



Abstract - The agricultural development strategy in the governorate of Mahdia encourages the creation of agricultural development groups with the aim of integrating rural actors in development. This inclusion requires the active involvement of all members of the community: men, women and young people. Thus, the GDA “Hrayer El Khmara” is a women's agricultural development group recently created in the Khmara region of the Chebba delegation from the governorate of Mahdia. It brings together 23 rural women with an average age of 40 and without gainful employment. The creation project of this group is based on a participative and inclusive approach involving the target population in the planning and execution of farm chicken farming. This work concerns the study and evaluation of the creation of this GDA in the Khmara region. Focus groups and field surveys were carried out with the female population in this area. The principles of solidarity and sharing are rooted among women. The inclusion of women, however, requires funding and mentoring efforts.

Keywords: Rural women, GDA, ESS, Khmara-Mahdia, inclusion, Tunisia.

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Copyright

This article is published under license to Journal of New Sciences. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

CC BY 4.0