Informatics Publishing Limited

J. Alice ¹, R. P. Sujeetha ¹, M. S. Venugopal ¹

Affiliations
1 Agricultural College and Research Institute Madurai 625 104, Tamil Nadu, IN

Abstract

Studies on the natural enemies of rice planthoppers revealed that Anagrus sp. was seen throughout the season, which shot up from the second fortnight of October to the first fortnight of Novemher. Pseudogonatopus sp. parasitized more number of Brown Planthopper (BPH). Parasitic efficiency of Pseudogonalopus sp. was more when two parasitoid adult females were released per hill. The functional response of a single mirid Cyrotorhimus lividipennis prey was greater than when in groups. A single mirid predated 3.33 and 2.66 BPH nymphs and 2.66 and 3.0 WBPH nymphs per day on TN1 and ADT36 rice varieties, respectively.

Keywords

Anagrus Sp., BPH Cyrtorhinus lividipennis Psuedogonatopus, WBPH.

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J. Alice ¹, R. P. Sujeetha ¹

Affiliations
1 Department of Entomology, Pandit Jawaharlal Nehru College of Agriculture and Research Institute, Karaikal (Pondichery), IN

Abstract

A field trial was conducted to study the impact of different insecticides recommended for the Control of pests of banana on different soil flora (Fungi, Bacteria and Actinomycetes) in the soil. The samples were drawn at monthly intervals till harvest of the crop. In carbaryl treatment, microbial population was low initially, but got restored later. With carbofuran, slight reduction of microbial population was observed immediately after the application of insecticides and got restored before harvest. But, with phorate, a slight enhancement of the population of bacteria and fungi was observed after the application of insecticides and it was restore at par with control before harvest of the crop.

Keywords

Fungi, Actinomycetes, Bacteria Stimulatory Effect, Suppressing Effects.

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T. Sakthivel ¹, J. Alice ¹, R. P. Sujeetha ¹, L. Nadarajan ¹

Affiliations
1 Dept. of Entomology, Pt. J.N. College of Agriculture & Research Institute, Karaikal (Puducherry), IN

Abstract

The field experiments conducted during 2005-06 at PAJANCOA & RI, Karaikal with Arka anamika okra variety to study the efficacy of botanicals on the sucking pests with ten treatments in three replications. In the first crop the population of aphid was less in NSKE 5 per cent (2.59), neem oil 3 per cent (3.33) and notchi leaf 5 per cent (4.53). Jassid and whitefly population was less in neem oil 3 per cent ( 0.25 and 0.38). Similar trend was also noticed in the second crop. The maximum yield was recorded in NSKE 5 percent (9892.12, 9325.72 kg ha^-1) as against in control (5800.00 and 5916. 67 kg ha^-1) in the first and second crop, respectively. Among the botanicals the NSKE registered highest B:C ratio of 2.28 and 2.15 in the first and second crop, respectively.

Keywords

Botanicals, Okra, B:C Ratio.

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J. Alice ¹, R. P. Sujeetha ¹, N. Muthurani ¹, L. Nadarajan ¹

Affiliations
1 Dept. of Entomology, Pt. J.N. College of Agriculture & Research Institute, Karaikal (Puducherry), IN

Abstract

Blackgram is considered to be an ancient crop and cultivated in India since time immemorial. Pulses belong to the sub family Fabaceae. Pulses suffer a great deal of damage during storage due to attack by the pulse beetle Callosobruchus chinenis (Linn.) (Bruchidae;Coleoptera).They are known to cause quantitative and qualitative losses to the stored pulses in India. Even though, infestation begins in the field, serious damage is caused during storage. The grain damage is as high as 69.39 per cent under storage conditions (Singh et al., 2001).

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