An in-vitro test was conducted at the laboratory of the Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and University (HSTU), Dinajpur, Bangladesh to screen out the tomato genotypes were screened for salt tolerance during germination. The test was conducted in the Completely Randomized Design (CRD) utilizing three replications. Ten tomato genotypes specifically BARI Tomato-2, BARI Tomato-3, BARI Tomato-5, BARI Tomato-11, BARI Tomato-14, BARI Tomato-16, Mintoo, Unnoyon, Mintoo Super and Sawsan were germinated on sand bed watered with five levels of salinity treatment i.e. 0, 4,8,12 and 16 dSm-1. The test was laid out in completely randomized design (CRD) with three replications. The days to 50% germination was maximum in Unnoyon genotype in all the treatments [1]. BARI Tomato-3 showed the minimum value in most of the cases. Root and shoot parameters like root length, shoot length, shoot fresh weight, root fresh weight, shoot dry weight, root dry weight, ratio on root and shoot fresh weight, ratio on root and shoot dry weight were the highest in BARI Tomato-2, Mintoo and Unnoyon, in contrast, the lowest performance of these traits were revealed in BARI Tomato-16 and BARI Tomato-3 at higher salinity treatment (12 and 16 dSm-1) than other genotypes in most of the cases. The overall results of the experiment exhibited BARI Tomato-2, Mintoo and Unnoyon found to be the more tolerant genotypes at higher salinity stress in respect of days to 50% germination and root and shoot characters than other genotypes.
A study was conducted to screen out the low-temperature tolerant Boro rice seedlings from November 2012 to January 2013 for facing the upcoming rice production challenge in Northwest Bangladesh. The experimental time was characterized by a prevailing low environmental temperature of below 15˚C. Five rice cultivars (V1: BR-2; V2: BR-16; V3: Pariza; V4: Minicate; V5: BRRI dhan 50) were selected for the study. The leaf proline, chlorophyll content and total carotenoid content were investigated. The V2 (BR-16) seedling synthesized the higher leaf proline (1.228 mg•g −1) at a low temperature than those of other tested cultivars. Again, the highest amount of chlorophyll-a (3.957 mg•g −1), chlorophyll-b (2.118 mg•g −1), chlorophyll-a/b ratio (3.6754 mg•g −1) and total chlorophyll (5.051 mg•g −1) was measured in V2 (BR-16). The maximum total carotenoid (1.213 mg•g −1) was also observed in V2. In this experiment, the V2 (BR-16) showed comparatively better potentiality to survive at low temperatures (below 15˚C) than other varieties.
The experiment was conducted in randomized completely blocked design with three replications. Different yield contributing traits like thousand grain weight (g), number of grains per spike, number of spikelet's per spike, days to anthesis, heading days, plant height (cm), days to maturity and grain yield (g/plot) were assayed. The result of the analyses of variance for all the traits showed Original Research Article
An experiment was conducted at Nagari union in Kaligonj Upazila of Gazipur district to determine the impact of Integrated Pest Management practices on tomato cultivation. Data were collected by using pre-designed interview schedule from 1 st March to 5 th August, 2014. The results of the study showed that in the study area farmers cultivated tomato in 14.6% of their land and there are eight IPM practices which are generally used by the farmers in their tomato fields. Regarding the overall adoption of IPM practices in tomato cultivation, 65.0% respondent farmers were in medium to high adoption category. The IPM Practice Use Index (IPUI) was found significantly higher in case of IPM adopters than in case of IPM non-adopters. But "use of pheromone trap", "setting up the bamboo stick in the field" and "cultivation and use of green manure" were ranked as 1 st , 2 nd and 3 rd , respectively in case of IPM adopters whereas "setting up bamboo stick in field", "cultivation and using green manure" and "use quality and resistant seeds" obtained 1 st , 2 nd and 3 rd rank, respectively in case of IPM non-adopters. The average infestation of insect and disease was found significantly lower in the fields of IPM adopter (9.7%) than IPM non-adopter (11.8%). The average frequency of chemical use in the season was also significantly lower in the fields of IPM adopter (2.14 times) than IPM non-adopter (3.44 times). The marketable yield was found significantly higher in the fields of IPM adopter (51.34 t/ha) than in the fields of IPM non-adopter (42.24 t/ha). The average gross return was also significantly higher in case of IPM adopter (526,143 taka/ha) than IPM non-adopter (472,647 taka/ha). The Benefit-Cost Ratio (BCR) of IPM adopter (2.41) was also found significantly higher than the BCR of IPM non-adopter (1.
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