Nature Environment and Pollution Technology

K. Jothivenkatachalam ¹, K. Suresh ²

Affiliations
1 Department of Science and Humanities, Sri Krishna College of Engineering and Technology, Coimbatore-641 008, T.N., IN
2 Department of Chemistry, CBM College of Arts and Science, Kovaipudur, Coimbatore-641 042, T.N., IN

Abstract

The paper deals with study of physico-chemical parameters such as pH, electrical conductivity, total dissolved solids, total hardness, total alkalinity, calcium, magnesium, manganese, ammonia, chloride, sulphate and fluoride of ground waters from seven sampling stations in Kuniamuthur and Madukkarai areas of Coimbatore. The analysed data were compared with standard values recommended by WHO, USPH, BIS and ICMR, and the variations were notable for the parameters like total hardness and electrical conductivity for few samples.

Full Text

   

B. Usha Rani ¹, K. Suresh ¹, R. Rajendran ¹

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai-625 104, Tamil Nadu, IN

Abstract

Use of resistant sources is one of the important techniques in integrated pest management, because the resistant cultivars are amenable to fit in integrated pest management strategies. Although resistant cultivars were developed and planted over large areas, they cannot maintain the insect population to below the economic threshold level due to various other stresses during the period of cultivation. In the absence of expected level of natural heritable resistance, creation and combination of induced resistance in plants to pests by the nutritional manipulation through organic farming is one of the promising supplements in encountering the pests and to obtain sustainability in rice production. For that a field experiment was conducted during November 2003 - February 2004 in Agricultural College and Research Institute, Madurai. The resistant sources used were TKM 6, IR 36 along with one check MDU 5. The organic nutrients used were FYM + biofertilizers + lignite fly ash + neem cake. It was found that the variety IR 36 treated with FYM, Azospirillum, phosphobacterium, SSB, lignite flyash and neem cake recorded the lowest population of BPH and WBPH per tiller. However highest grain yield of 5.40 t/ha was recorded in the treatment with the variety IR 36 + NPK as inorganic form.

Full Text