Agricultural sciences最新文献_第8页

Different Susceptibility in the Two Sympatric Sweet Potato Weevils, Cylas formicarius and Euscepes postfasciatus, to the Entomopathogenic Fungus Metarhizium anisopliae 两种同域甘薯象鼻虫（&lt;i&gt;Cylas formicarius&lt;/i&gt; 和 &lt；i&gt;Euscepes postfasciatus&lt;/i&gt; 对昆虫病原真菌 &lt;i&gt;Metarhizium anisopliae&lt;/i&gt；

Agricultural sciences Pub Date : 2023-01-01 DOI: 10.4236/as.2023.149086

Gadi V. P. Reddy, Susumu Shimizu, Katsuya Ichinose

{"title":"Different Susceptibility in the Two Sympatric Sweet Potato Weevils, &lt;i&gt;Cylas formicarius&lt;/i&gt; and &lt;i&gt;Euscepes postfasciatus&lt;/i&gt;, to the Entomopathogenic Fungus &lt;i&gt;Metarhizium anisopliae&lt;/i&gt;","authors":"Gadi V. P. Reddy, Susumu Shimizu, Katsuya Ichinose","doi":"10.4236/as.2023.149086","DOIUrl":"https://doi.org/10.4236/as.2023.149086","url":null,"abstract":"Laboratory and field experiments were performed to evaluate the pathogenicity of an isolate of the entomopathogenic fungus Metarhizium anisopliae to the two sympatrically occurring weevil species, Cylas formicarius and Euscepes postfasciatus. In the laboratory bioassays, suspension of conidia, ≥106 CFU/mL, caused mortalities > 80% on adults of both weevils in seven days after inoculation. It took longer time 20 days for grain formulation of the isolate adhered on rice grains of ≥5 g/m2 (107 CFU/g) to attain similar mortalities of E. postfasciatus, but no evident mortality was obtained in C. formicarius. The grain formulation was thus less effective on C. formicarius than the suspension. Field trials were carried out over two years from 2013 to 2014, in which adults of E. postfasciatus were released two times during the field experiments for enhancement of damage on plants by this weevil, whereas the other weevil species was left to naturally invade the experimental plots by flying. The results of the experiments revealed in both years that two applications of the isolate in grain formulation, equivalent to 50 kg/hectare, sprayed manually over the ground surface reduced the infestation of plants and tuber damage by weevils of both species as much as the conventional chemical insecticide applications. The occurrences of weevils at harvest were not significantly different among treatments. The potential and possible uses of the fungus are discussed for the management of these two weevil species.","PeriodicalId":7600,"journal":{"name":"Agricultural sciences","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135441843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of the Productivity of Intercropping Plantain Cultivar (PITA 3) Fertilized with Two Types of Manure, under Coconut Tree Based (Cocos nucifera L.), on the Tertiary Sands of Côte d’Ivoire 椰基(Cocos /i>nuifera L.)，在象牙海岸的第三纪沙滩上

Agricultural sciences Pub Date : 2023-01-01 DOI: 10.4236/as.2023.1410092

Pierre-Marie Janvier Coffi, Joséphine Tamia Ama, Thierry Tacra Lekadou, Siaka Traore, Charly Fernand Agoh, Didier Martial Saraka Yao

{"title":"Evaluation of the Productivity of Intercropping Plantain Cultivar (PITA 3) Fertilized with Two Types of Manure, under Coconut Tree Based (&lt;i&gt;Cocos&lt;/i&gt; nucifera L.), on the Tertiary Sands of C&#244;te d’Ivoire","authors":"Pierre-Marie Janvier Coffi, Joséphine Tamia Ama, Thierry Tacra Lekadou, Siaka Traore, Charly Fernand Agoh, Didier Martial Saraka Yao","doi":"10.4236/as.2023.1410092","DOIUrl":"https://doi.org/10.4236/as.2023.1410092","url":null,"abstract":"Pressure on land tenure is having a negative impact on the coconut sector, reducing farmers’ incomes. Intercropping cultivars plantain under coconut based has been considered as a solution to this problem. The aim of this work is to diversify the sources of income for coconut growers. The plantain variety PITA 3, popularised by the CNRA, was grown in coconut inter-rows (PB113+), with two types of manure (chemical, organic). Six (06) treatments D1, D2, D3, D4, D5 and D6 were studied. In the tenth month after planting, treatment D3, which included banana plants fertilised with 9 kg of manure/plant, got the best agromorphological performance: height (264.08 cm), neck circumference (57.68 cm) and 12 leaves. In terms of production parameters, D3 banana plants had a shorter production cycle (347 days) and the highest diet mass (9.3 kg). However, the plants that received no fertiliser (D6) showed stunted growth and were unable to produce brunch. The fertilization of plantain with 10 t/ha of laying hen droppings permitted good development and production of plantains on tertiary sands.","PeriodicalId":7600,"journal":{"name":"Agricultural sciences","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135212756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Why Blueberries? 为什么蓝莓?

Agricultural sciences Pub Date : 2023-01-01 DOI: 10.4236/as.2023.148075

E. Kafkas, İpek Ürün

引用次数: 0

Development and Fabrication of Manually Push-Pull Type Conical Weeder for Bangladesh Condition 孟加拉条件下手动推拉式圆锥除草机的研制

Agricultural sciences Pub Date : 2023-01-01 DOI: 10.4236/as.2023.145046

Subrata Paul, B. Nath, A. Hossen, Kamruzzaman Pintu, Haimonti Paul, Sharmin Islam, Arafat Ullah Khan, Moudud Ahmmed

引用次数: 0

Phosphorus Fertilizer Effects on Near-Surface Soil Aggregation in Furrow-Irrigated Rice on a Silt-Loam Soil 磷肥对粉壤土沟灌水稻近表层土壤团聚体的影响

Agricultural sciences Pub Date : 2023-01-01 DOI: 10.4236/as.2023.146055

Jonathan B. Brye, Diego Della Lunga, K. Brye, Chandler Arel, Shane Ylagan