The experiment was conducted at the laboratory of Postharvest Technology Section, Horticulture Research Centre, Bangladesh Agricultural Research Institute, Gazipur to select suitable additives for preparing ready-to-cook mixed vegetables. Mixed vegetables were treated with T1= 0.5% ascorbic acid, T2= 0.5% citric acid and T3= 0.5% CaCl2 with control and stored at refrigerator (4±1oC). Ready-to-cook mixed vegetables treated with 0.5% citric acid (T2) showed better shelf life of 7 days over all treatments retaining better color, total acidity (%), vitamin C and sensory quality stored at refrigerator (4±1oC).
The principles of sustainable agriculture is to design the agricultural landscape by creating and maintaining the diversity of all natural resources in compatible manner. Intercropping is the practice of cultivating two or more crops at the same time in a particular field. Many studies highlight the impacts of intercropping and its contribution to insect management strategies based on population dynamics of the insect species. Spatial combination of mixed and row intercropping, crop rotation play significant impact on reducing insect pest populations, increasing beneficial insects, and weed suppression. In addition, non-crop plants such as weeds, cover crops, and habitat plantings can be combined in space and time to influence numbers of pest and beneficial arthropods on the main crop. However, intercropping has some disadvantages such as the selection of the appropriate crop species and the appropriate sowing densities, including extra work in preparing and planting the seed mixture, during crop management practices, including harvest that can indirectly alter the principles of pest management strategies. This paper provides an overall view and evidence of introducing the concept of crop diversity through intercropping, summarizing its main advantages supported by a number of key examples from the literature, considers recent insights and mechanisms underlying intercropping, and discusses its potential against insect control for implying its great value in the context of sustainable agriculture.
The field experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University during July to December 2015 to find out effects of urea super granule application on physiological and yield attributes of rice cultivar BRRI Dhan 31 and BRRI Dhan 34. The experimental treatments included two T. aman rice varieties viz. BRRI Dhan 31 and BRRI Dhan 34 and six levels of nitrogen viz. no nitrogen, pilled urea (50 kg/ha), USG 32.5 kg/ha, USG 50 kg/ha, USG 62.5 kg/ha and USG 75g ha-1. Rice cultivars differed significantly in all growth and yield contributing characters and BRRI Dhan 31 produced the highest grain yield (3.73 t/ha). Among the treatments, USG 62.5 kg/ha performed the best on all the parameter studied and gave highest grain yield (3.85 t/ha). Interaction of urea application and rice yield revealed that significantly higher grain yields were given by BRRI Dhan 31 and USG 62.5 kg/ha (4.45 t/ha). The higher grain yield was attributed mainly to the number of effective tillers/hill, filled grains/panicle and 1000-grain weight.
Crop Management especially planting time and spacing is very important factor for proper growth and development of crop resulting higher yield. To find out the optimum planting time and suitable spacing of pointed gourd production, the experiment was conducted at Regional Agricultural Research Station, Ishurdi, Pabna, Bangladesh. Three sowing time viz. (i) T1=15 October, (ii) T2=1 November and (iii) T3=16 November and three plant to plant spacing viz. (i) S1=1.50 m, (ii) S2=1.00 m and (iii) S3= 0.50 m were included in the experiment. However, days to seedling emergence, first female flower opening and fruit harvest was significantly varied in case of planting time but not for spacing. Spacing had significant effect on number of fruits per unit area. The maximum number of fruits per plot (375) produced by S3 treatment. On the other hand, wider spacing produced the highest single fruit weight (50.33 g).However, there was a significant difference among the planting time regarding yield. The highest yield (42.41 t/ha) was obtained from T1 treatment and the lowest yield (39.13 t/ha) from T3 treatment, respectively. In case of spacing, S2 treatment produced the highest yield (44.57 t/ha) and S3 produced the lowest yield (35.56 t/ha). Contrary, T1 with S2 treatment combination produced the highest yield (46.55 t/ha) and the lowest yield (30.40 t/ha) was recorded from T3 with S3 treatment combination. The results revealed that 15 October planting time with 1.0 m spacing is suitable combination for pointed gourd production in Bangladesh.
Management of Callosobruchus chinensis L. was studied in the laboratory of Entomology of BSMRAU during 2017-2018 using seven mungbean varieties. BU mug 2, BU mug 3, BU mug 4, BU mug 5, Binamoog-5, BARI Mung-6 and BARI Mung-8 were used as the seed materials against three treatments consisting neem oil, emamectin benzoate 5 SG and untreated control. The control measures, percentage of seed damage, percentage of weight loss, number of live adults of C. chinensis in representative sample, seed germination (%) and seed moisture content (%) were observed. Different aspects of seed quality parameters were evaluated by botanicals and chemicals against the C. chinensis. Both the treatments were found effective without affecting less the germination and moisture content and controlled the pulse beetle infestation effectively compared to untreated control.
Representative isolates of 25 Rhizoctonia solani AG1-IA, associated with rice sheath blight were examined for rep-PCR fingerprinting variations and sequence variations in the ITS-5.8S rDNA region in North Vietnam. Forty four isolates of R. solani, 30 isolates of R. oryzae and 29 isolates of R. oryzae-sativae were isolated from the diseased samples collected from three different regions of Myanmar. Assay of rep-PCR was subjected to the two primers evaluations, ERIC2 and BOXA1R, respectively. Moreover, sequences of these isolates were aligned with other known R. solani sequences from the NCBI and GenBank and distance and parsimony analysis were used to obtain population structures. Clonal population of R. solani AG-1 IA, causal agent of rice sheath blight, were presented at the two distinct groups (Rep-Vet1 and Rep-Vet2) based on the fingerprinting dendrogram with the similarity coefficient score at 75% differentiations. Geographical relationships of the clonal population such as the two distinct groups were not presented. However, these two subgroups including clonal populations of Rep-Vet1 and Rep-Vet2 were divided into different clade separated from known AG1-IA subgroups based on sequencing analysis. Vietnam AG1-IA Isolates collected from Red River Delta presented not correlation of geographical distribution but dispersals in the collection area by analyzing of their clonal population structures. Moreover, two types of R. solani AG1, two types of R. oryzae, and three types of R. oryzae-sativae of Myanmar isolates were differentiated by rep-PCR. The results obtained from rDNA-ITS sequence analysis also revealed the presence of genetically diverse populations of R. solani, R. oryzae and R. oryzae-sativae in Myanmar.