Informatics Publishing Limited

M. Suganthy ¹, P. Sakthivel ¹

Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN

Abstract

Predatory potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus montrouzieri Mulsant on Paracoccus marginatus (Williamsand Granara de Willink) infesting sunflower was studied in the lab. Results revealed that grubs of C. zastrowi sillemi was 1.4 ± 0.5, 85.0 ± 7.3 and 13.2 ± 1.3 ovisacs, nymphs and adults, respectively. Among various instars of the predator, second and third instar were voracious and consumed 1.6 ± 0.5, 139.0 ± 5.4 and 22.8 ± 2.1 and 3.4 ± 0.5, 230.4 ± 29.2 and 32.5 ± 2.6 ovisacs, nymphs and adults of P. marginatus, respectively. Grubs of C. montrouzieri fed 7.6 ± 0.7, 153.6 ± 23.8 and 62.8 ± 11.6 ovisacs, nymphs and adults of P. marginatus to complete their life stages. Among various instars of the predator, third and fourth instar were voracious and consumed 2.2 ± 0.4, 43.6 ± 2.0 and 23.2 ± 3.0 and 2.8 ± 0.4, 69.6 ± 4.6 and 27.6 ± 4.6 ovisacs, nymphs and adults of P. marginatus, respectively. Adult C. montrouzieri consumed on an average 5.2 ± 0.8, 101.2 ± 13.5 and 35.4 ± 8.6 ovisacs, nymphs and adults of P. marginatus.

Keywords

Predatory Potential, Chrysoperla zastrowi sillemi, Cryptolaemus Montrouzieri, Paracoccus marginatus, Sunflower.

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M. Suganthy ¹, P. Ramamoorthy ²

Affiliations
1 Anna University, IN
2 Sri Sakthy Institute of Engineering and Technology, Coimbatore, IN

Abstract

Biometrics is the science and technology of measuring and analyzing biological data of human body, extracting a feature set from the acquired data, and comparing this set against to the template set in the database. Biometric systems have now been deployed in various commercial, civilian and forensic applications as a means of establishing identity. The biometric system is one such that can provide accurate and reliable scheme for person verification. Biometric systems are of two types: unimodal and multimodal.:Unimodal Biometric systems based solely on one-modal biometrics are often not able to meet the desired performance requirements for large user population applications, due to problems such as noisy data, intra-class variations, restricted degrees of freedom, non-university, spoof attacks, and unacceptable error rates. Multimodal biometrics refers to the use of a combination of two or more biometric modalities in a single identification system. The multimodal biometrics are; face and finger print, face and iris/, iris and finger print etc. In this paper we have concentrated in fusion of face and iris for multimodal biometric authentication. We adopted a new approach called the contourlet transform is a new extension of the wavelet transform in two dimensions using multi-scale and directional filter banks for iris feature extraction.

Keywords

Multimodal, Authentication, Fusion, Face, Iris, Contourlet, Wavelet.

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