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Bhoopathi, R.
- Determination of Key Mortality Factor of Mexican Beetle, Zygogramma Bicolorata Pallister
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Authors
Affiliations
1 Biological Control Laboratory, Division of Entomology, Indian Agricultural Research Institute, New Delhi 110 012, IN
1 Biological Control Laboratory, Division of Entomology, Indian Agricultural Research Institute, New Delhi 110 012, IN
Source
Journal of Biological Control, Vol 25, No 2 (2011), Pagination: 127-133Abstract
Life tables were constructed under Delhi conditions for Zygogramma bicolorata in order to determine the key mortality factor acting on the species. The pupal stage was found to be the key mortality stage that contributed most to the overall mortality followed by egg stage. Pupal malformation, failure to lay eggs and infertility were prominent mortality factors. The main cause of mortality of older larvae was their inability to burrow into hard and dry soil for pupation. Besides, weather factors in general were found to have an effect on all developmental stages of Z. bicolorata. The sex ratio was biased towards females with their proportion being 0.6-0.7. The generation trend index was very high (272.21) during July followed by October (231.07) and August (199.40). The generation mortality was low during June-October while it was high during January, May and December.Keywords
Life Table, Zygogramma Bicolorata, Parthenium hysterophorus.Full Text
- Physical Properties of Glass-Hemp-Banana Hybrid Fiber Reinforced Polymer Composites
Abstract Views :84 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, Sri Sai Ram Engineering College, Chennai - 600044, Tamil Nadu, IN
2 Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore - 641407, Tamil Nadu, IN
3 Department of Mathematics, Valliammai Engineering College, Chennai - 603203, Tamil Nadu, IN
4 Department of Computer Science and Engineering, Faculty of Computing, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
1 Department of Mechanical Engineering, Sri Sai Ram Engineering College, Chennai - 600044, Tamil Nadu, IN
2 Department of Mechanical Engineering, KPR Institute of Engineering and Technology, Coimbatore - 641407, Tamil Nadu, IN
3 Department of Mathematics, Valliammai Engineering College, Chennai - 603203, Tamil Nadu, IN
4 Department of Computer Science and Engineering, Faculty of Computing, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 10, No 7 (2017), Pagination:Abstract
Background/Objectives: In this experimental work the effect of mechanical properties on incorporation of glass fibre with treated banana-hemp fibres has been studied. Methods/Statistical analysis: Banana and hemp fibres are extracted by enzymatic processes for successfully removing lignin. The alkaline solution was used to treat the fibres since it is increases their mechanical strength. The banana, hemp and glass fibres were reinforced with the epoxy matrix and the hybrid composites were fabricated by using hand layup process. Alternative orientations of fibres were used for the fabrication of the laminates in order to improve their strength. Findings: As per the ASTM standards, test specimens were prepared from the laminates with the stacking sequence of glass/banana fibre, glass/hemp fibre and glass/banana/hemp fibre. The mechanical characteristics were obtained by impact test, tensile test and flexural test for the fabricated samples. The interfacial analysis was conducted using scanning electron microscope to estimate voids, fractures and fibre pull out. The experimental result shows that the glass/banana/hemp fibre composite exhibits maximum tensile strength than the other two combinations. The hemp-glass fibre composite holds the maximum flexural strength followed by glass/hemp/banana fibre composites. The glass/banana fibre composites hold maximum impact energy and the value of the composites varies from 7.33 to 9.33 Joules. Application/Improvements: These composites are performing well in all kind of mechanical loadings. It is suggested that these materials can be used in the relevant fields.Keywords
Alkaline Treatment, Banana Fiber, Hemp Fiber, Mechanical Properties, SEM Analysis.Full Text