International Journal of Plant Protection

V. Gowtham ¹, N. Dilipsundar ¹, K. Balaji ¹, S. Karthikeyan ¹

Affiliations
1 College of Agricultural Technology, Theni (T.N.), IN

Abstract

Considering the importance of safe food, avoiding of excess pesticide application and pesticide pollution the present study was conducted. In this experiment totally four pesticides were tested against cowpea aphid Aphis craccivora under pot culture experiment at College of Agricultural Technology, Theni. Among the four acetamprid 20 SP (0.125g/ml) proved highly effective against Aphis craccivora compared to the rest of the pesticides with mortality of 98.75 per cent. In case of dosage wise acetamprid 20 SL (0.125g/ml) and imidacloprid17.8 SL(0.25ml/l) proved to be highly effective with mortality percentage of 98.33 and 86.66, respectively. Thus, it is concluded that all the studied pesticides, Acetamprid proved effective to control the cowpea aphids.

Keywords

Chemical Pesticide, Efficiency, Cowpea, Aphid.

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K. Balaji ¹, Y. Hariprasad ¹

Affiliations
1 Department of Entomology, Annamalai University, Chidambaram (T.N.), IN

Abstract

A study was conducted at Department of Entomology, Annamalai University, Chidambaram, Tamil Nadu during 2000-2002. The meteorological parameters such as maximum, minimum temperatures, relative humidity, rainfall, wind velocity, hours of sunshine were correlated with mite population and correlation coefficients obtained were revealed that maximum, minimum temperature and wind velocity were positively correlated. Relative humidity, rainfall and sunshine were negatively correlated. The increase in these parameters decreased the mite population. By using the regression equations mean mite population /8mm² can be predicted for a given set of meteorological parameters. A unit increase in maximum temperature keeping other parameters constant resulted in increase in population of 1.31/8mm² area. In contrast, a unit increase in rainfall resulted in decrease in mite population of 0.83/8mm².

Keywords

Coconut, Eriophyid Mite, A.guerreronis, Correlation.

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K. Balaji ¹, Y. Hariprasad ¹

Affiliations
1 Department of Entomology, Annamalai University, Chidambaram (T.N.), IN

Abstract

A laboratory experiment was conducted at Department of Agricultural Entomology, Annmalai University, Chidambaram to know the efficacy of some pesticides and biopesticides against A.guerreronis. The treatments used were Phytopalm 1.5g, Phytopalm 1g, Neem azal 1 per cent, Fortune aza 1.5 per cent, Neem Seed Kernel Extract 5 per cent, Neem oil 3 per cent, Nochi leaf extract 3 per cent, Calotrpis leaf extract 5 per cent. For comparing the efficacy of selected botanicals and monocrotophos 0.04 per cent was used as treated check in Randomized Block Design with five replications.

Keywords

Coconut Mite, A. guerreronis, Biopesticides, Bioassay.

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