Open Access Original Research Article

Evaluation of the Efficacy of Chemical Insecticides and Biopesticides against Flea Beetle in Cabbage (Brassica oleracea var. Capitata)

Fatima Farhana, Md. Abdul Latif, Mohammed Ali

Asian Plant Research Journal, Page 1-10
DOI: 10.9734/aprj/2021/v7i430159

Aims: This study aimed to evaluate chemical insecticides and bio-pesticides against flea beetle in cabbage.

Study Design: The experiment was laid out at a randomized complete block design with three replications.

Place and Duration of Study: Experimental farm of Sher-e-Bangla Agricultural University, Bangladesh during the period from October 2017 to March 2018.

Methodology: The experiment consisted of nine treatments viz. T1(Sevin 85 WP @ 2g/L of water), T2 (Decis 2.5 EC @ 1.0 ml/L of water), T3 (Voliam flexi @ 0.5 ml/L of water), T4 (Ripcord 10 EC @ 1.0 ml/L of water), T5 (Dursban 20EC @ 1 ml L-1 of water), T6 (Tobacco leaf extract @ 3 g L-1 of water), T7 (Neem seed kernel extract @ 3 g L-1 of water), T8 (Bioneem plus 1 EC @ 1 ml L-1 of water) and T9 (Untreated Control) were used at 7 days interval.

Results: Stripped flea beetle(Phyllotreta striolata) and white-spotted flea beetle (Monolepta signata), these two species of flea beetle were found in the experimental field. Among all the treatments T4 (Ripcord 10EC)performed the best in managing flea beetles based on the lowest percentage of leaf infestation (5.84%), lowest no. of holes per plant (6.13), lowest percentage of head infestation by number (18.04) and highest percentage of infestation reduction over control on all parameters at vegetative stage of plant. Again, the lowest leaf infestation intensity (5.73%), lowest number of holes per infested head (14.00), lowest percentage of infestation of head by number (6.69) were achieved at harvesting stage from the same treatment (T4) whereas the highest values of all these parameters were achieved from untreated control treatment (T9). T4 treatment provided the best performance in yield where yield was increased (112.51 %) over control, giving maximum yield 75.76 tons ha-1. Bioneem plus 1 EC (T8) performed the best among the biopesticides while the neem seed kernel extract showed less effectivity against flea beetle.

Conclusion: It is concluded that in case of chemical insecticides Ripcord 10EC while in case of biopesticides Bioneem plus 1 EC would be effective for flea beetle management.

Open Access Original Research Article

Comparison of Broadcast and Row Planting Methods on Growth, Grain yield and Yield Components of Wheat (Triticum aestivum L.), Khost Province, Afghanistan

Ahmad Yar Ahmadi, Mohammad Jan Arian

Asian Plant Research Journal, Page 11-17
DOI: 10.9734/aprj/2021/v7i430160

Appropriate planting method is an important work from the agronomic practices for the high and qualitative yield of wheat crop according to the agro - ecological condition of one area. This study was conducted to investigate the agronomic performance of three wheat varieties (Junt 01, Kabul 013 and Lalmi 04) in two planting methods (broadcast and row methods) in the growing season of 2019 - 2020 in Nadir shah kot District, Khost Province. The experimental design was Randomized Complete Block with three replications. Planting method differed significantly (p < 0.05) for days to heading (DH) 50%, plant height (PH) and significantly (p<0.01) for grain yield (GY). Row planting methods had superior means of the mentioned traits compare to broadcast method. In case of varieties, also were significant differences (p<0.01). Junt 01 variety produced the highest GY followed by Kabul 013 and Lalmi 01 produced the lowest GY. From the study found that the above mentioned varieties to be cultivated in row planting method under Khost climate conditions, and can be used in local studied area.

Open Access Original Research Article

Growth and Yield Response of Groundnut (Arachis hypogea L.) to Inorganic Fertilisers at Luyengo, Middleveld of Eswatini

Ziyanda Precious Mavimbela, Mzwandile Mabuza, Tamado Tana

Asian Plant Research Journal, Page 18-28
DOI: 10.9734/aprj/2021/v7i430161

Groundnut is an important food and cash crop for smallholder farmers in Eswatini. However, its yield is very low partly due to poor soil fertility particularly calcium and phosphorus deficiencies associated with soil acidity. Thus, a field experiment was conducted to determine the effects of different inorganic fertiliser types on growth and yield of groundnut. The treatments were: a control with no fertiliser, [2:3:2 (22) at 300 kg ha-1], single superphosphate (100 kg ha-1), calcium nitrate (120 kg ha-1) and a combination of calcium nitrate (120 kg ha-1) and single superphosphate (100 kg ha-1). A randomised complete block design (RCBD) with three replications was used. Results showed highly significant (p<0.01) differences among the fertiliser types on most of the growth parameters recorded. At 90% flowering, significantly highest number of leaves per plant (48.3), the tallest plant (42.17 cm), the highest canopy width (41.47 cm), the highest number of branches per plant (6.57) and plant dry biomass per plant (20.6 g) were recorded for treatments with calcium nitrate followed by the application of combination of calcium nitrate and single superphosphate. Similarly, most of the yield components and yield were significantly (p<0.05) affected by the fertiliser types. Significantly highest numbers of total pods per plant (28.8), mature pods per plant (26.9), dry pod yield (950.6 kg ha-1), hundred seed mass (82.8 g), shelling percentage (70.6) and seed yield (671.6 kg ha-1) were recorded from a combination of calcium nitrate and single superphosphate fertiliser. Thus, combined application of 120 kg ha-1 calcium nitrate and 100 kg ha-1 single superphosphate fertilisers can be used to increase the productivity of groundnut in the study area.

Open Access Original Research Article

Evaluation of the Toxicological Profile of Yagari

Uzuazokaro Mark-Maria Agatemor, Okwesili Fred Chiligue Nwodo

Asian Plant Research Journal, Page 29-45
DOI: 10.9734/aprj/2021/v7i430162

Background and Objective: Data from researches have shown a rise in disease, ill health and death linked with the utilization of herbal products, thereby raising global awareness in the last few years. On that account, the safety and toxicity evaluations of herbal products and preparations was essential. This study evaluated the toxicological profile of Yagari – a herbal mixture.

Materials and Methods: Acute oral toxicity (LD50) was carried out in Swiss mice according to Lorke’s method while sub-chronic toxicity study was carried out with 20 adult albino rats which were divided into 4 groups of 5 animals each. Group one served as control and received normal saline while Groups 2 to 4 received 250, 500 and 1000 mg/kg yagari respectively for 28 days. The body weights of the rats were monitored while on day 29, the rats were sacrificed and blood samples and organs were collected for biochemical/hematological analysis and histopathological examination respectively.

Results: Results showed that Yagari is not noxious up to 5000 mg/kg following acute oral toxicity study. The sub-chronic toxicity test divulged that Yagari had no serious end results on the biochemical, hematological and histopathological parameters, although the body weight of the animals significantly increased.

Conclusion: It was concluded that Yagari is not toxic, still further investigations on a large number of animals are essentially needed to denote safety and efficacy of the herbal formulation.

Open Access Original Research Article

Repellency Effects of Three Indigenous Plant Extracts Against the Red Rust Flour Beetle Tribolium castaneum Herbst (Coleoptera: Tenebrionidae) in Northeastern Nigeria

M. A. Medugu

Asian Plant Research Journal, Page 46-52
DOI: 10.9734/aprj/2021/v7i430163

Background: The current study was conducted in the Laboratory of Department of Crop Protection, Modibbo Adama University of Technology, Yola to evaluate the repellent effects of different concentrations of extracts of Azadirachta indica (Neem, Moringa oleifera (Drum stick) and Hyptis souveolens (Pig weed) against Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) at various time intervals and their interactions. Three concentrations viz; 5, 10 and 15% were applied to evaluate the Repellence of T. castaneum at five different exposure periods of 24, 48, 72, 96 and 120 hours. Repellence action of extracts of A. indica, H. souveolens and M. oleifera evaluated against the T. castaneum had maximum repellency (81.63%) at highest concentration of 15%, followed by H. souveolens (79.37%) and M. oleifera (50.46%). Regarding interaction between concentration and time, repellence increases with respect to increase in concentration, but reduces with passage of time. This shows that toxicity effects of these plant extracts is directly affected by concentration and time. Therefore, this study confirmed that these plant extracts are effective in the management of T. castaneum and most effectively at higher concentration within short period of time.