Green Farming Vol. 1 (1) : 64-66 (Jan.-Feb., 2010) (Renewed)

DIPMALA G. GUPTA and H.N. SHELAT

Department of Microbiology, B.A.College of Agriculture, Anand Agricultural University, Anand – 388 110 (Gujarat)

ABSTRACT .

Screening of endophytes was done in situ using whatman paper method which confirmed the positive effect of tryptophan on IAA production. In freshly prepared cultures, the concentration of IAA was maximum gradually decreasing on long term storage. In vivo, efficacy testing of the screened isolates in maize was carried out during rabi 2007-08, wherein, foliar application of Azopsirillum Az-4 in maize cv. GM-3 proved significantly superior over respective control. The findings of this study provide significant evidence that IAA and GA3 were produced by nitrogen fixing endophytic isolates of Azospirillum and Acetobacter which promotes biological activity in maize with an added advantage of reduction in 25 % nitrogenous fertilizer.

Green Farming Vol. 1 (1) : 1-5 (Jan.-Feb., 2010) (Renewed)

P.B. PATEL and  H.C. PATHAK

Department of Plant Breeding and Genetics, C.P. College of Agriculture, S.D. Agricultural University,

Sardar Krushinagar, Banaskantha - 385 506 (Gujarat)

ABSTRACT .

The genetics of seed yield, wilt resistance and biochemical traits was investigated through generation mean analysis for four crosses in six generations. Results indicated that developing high yielding wilt resistant hybrids, both the parents should be resistant to wilt. Biochemical constituents viz., total soluble sugar, total phenol, flavonoids, total protein content, and enzyme activity viz., peroxidase and polyphenol oxidase were generally higher in resistant genotypes than susceptible ones under normal and disease inoculated conditions and thus appear to play an important role in imparting resistance against fusarium wilt in castor. Involvement of both additive and non-additive gene actions with preponderance of non-additive gene actions for seed yield, wilt resistance and biochemical traits  suggested that hybrid breeding can profitably be utilized for improving seed yield and wilt resistance in castor by exploiting dominance/ non-additive gene action. However, to exploit both additive and non-additive types of gene actions observed for seed yield and biochemical constituents, cyclic method of breeding involving conventional breeding approaches for selection of superior recombinants and their inter se crossing can alternatively be utilized for the development of high yielding, wilt resistant inbred and pistillate lines with desirable biochemical constituents which appear to impart resistance to wilt.

Green Farming Vol. 1 (1) : 20-23 (Jan.-Feb., 2010) (Renewed)

MANSOUR ZARRA NEZHAD  and  EHSAN ZOHOORI

Shahid Chamran University of Ahvaz, (and Fellowship at Humanities College of I.A.University)

Islamic Azad University of Shushtar, Khuzestan, Iran

ABSTRACT .

Summer crops and vegetable production, in addition to increase employment and agricultural products, develop land productivity. The aim of this paper is to evaluate the cost and benefit of summer crops and vegetables production in Iran during 2006-07 using Lanjan’s greenhouse farmlands as a case study. The method of the study is cost-benefit analysis. The findings of the research showed a positive net present value an capital recovery, specially in traditional farmlands in short term. The benefit-cost ratio was greater than one and internal rate of return was greater than acceptable interest rate. The results also showed that except in one case, benefit- cost ratio is greater than unit indicating profitability of investment in greenhouses. The sensitivity analysis showed that the profitability is highly sensitive to cost production. Crop rotation was found to be an essential practice in the way that growing summer crops is preceded by vegetable production.

Green Farming Vol. 1 (1) : 51-54 (Jan.-Feb., 2010) (Renewed)

I. YESU RAJA and M. THERADIMANI

Deptt. of Pl. Pathology, Agric. College & Research Institute, T.N. Agricultural University,

Madurai - 625 104  (Tamil Nadu)

ABSTRACT.

A significant reduction in total soluble, reducing and non-reducing sugar contents was observed in Sarocladium oryzae infected rice grains and it was to the maximum extent in the infected grains of CO 43 and ADT 36.  The infected grains of different rice cultivars showed increase in total phenol content ranging from 29.20 to 56.11 per cent. The starch and total protein contents in the infected grains of various rice cultivars decreased as compared to that in the healthy grains of the respective rice cultivars.

Green Farming Vol. 1 (1) : 55-58 (Jan.-Feb., 2010) (Renewed)

P.P BHALERAO,  R.R. BHALERAO,  S.J. PATIL,  S.S. GAIKWAD  and  C.M. PATEL

Deptt. of Pomology, Aspee College of Horticulture and Forestry, Navsari Agricultural University,

Navsari - 396 450 (Gujarat)

ABSTRACT .

The post-harvest treatment of Gibberellic acid (GA3) 100 mg l-1 delayed the process of ripening and extended the shelf-life as well as also helped in maintaining the marketability of ripe fruit percentage, fruit firmness and tended to reduce the weight losses of banana fruits cv. Grain Naine. Moreover, it also maintained desirable qualities like sugars, acidity and ascorbic acid in the fruits. In case of hand treatment, fruits from 1st to 4th hand of the bunch (H1) showed promising results in delaying ripening and other physico-chemical process during storage period of banana fruit cv. Grand Naine.

P.V. MATTI,   C.P. MALLAPUR,  R.J. RABINDRA  and  D.P. BIRADAR

Department of Agric. Entomology, University of Agricultural Sciences, Dharwad - 580 005 (Karnataka)

Project Directorate of Biological Control (ICAR), Hebbal, Bangalore - 560 024 (Karnataka)

ABSTRACT .

RAPD technique helps to identify discreet genetic markers in Aphididae, a family in which biochemical and morphological genetic polymorphisms are rare. Investigations were carried out to study the genetic diversity through, molecular characterization of sugarcane woolly aphid (SWA) under laboratory conditions. RAPD revealed large amount of genetic variations among individuals. There exist variations in the DNA profiling among all samples. The dendrogram constructed using symmetric matrix of different samples resulted into two major clusters. The similarity matrix pertaining to different isolates of SWA revealed that the similarity coefficient ranged from 0.22-0.60. The highest genetic similarity index of 0.60 was seen between the isolates from Bangalore and Poona followed by 0.40 between the isolates from Assam, Sameerwadi (Bagalkot).