scholarly journals How do they cope with the situation when the caterpillars of beet armyworms, Spodoptera exigua, attack their host plant under different fertilization conditions?

Author(s):  
Sifang Wang ◽  
Tianbo Ding ◽  
Manlin Xu ◽  
Bin Zhang

Fertilizer with different ration of nitrogen (N) to phosphorus (P) could influence performance of plants including crops and vegetables. Spodoptera exigua is an important agriculture pest that has caused serious economic loss especially recent decades. In the present study, we explored that the response of host plants and S. exigua after S. exigua caterpillars damaged on the way of different level intensity and frequency under five fertilizer treatments with different ratio of N to P. The results indicated that fertilizer can significantly influence the interaction between host plants and caterpillars. Compensatory growth was detected under definite fertilizer with N : P = 3 : 1. Higher N proportion in fertilizer appears to contribute to maintain similar stem biomass in defoliated seedlings to control ones. Root biomass had almost no significant difference between defoliation and control, but it can not compensate under definite fertilizer. Higher proportion of N in fertilizer also contributed to enhance antioxidant enzymes activities: antioxidase catalase (CAT), superoxide dismutase (SOD), at low-level intensity caterpillars on host plants.However, when the herbivorous intensity was increasing, higher proportion of P in fertilizer seemed to play more important role on increase the activities of CAT and SOD. Higher phosphorus likely contributes to enhance acetylcholin esterase (AChE) activity at lower degree of defoliation, but higher nitrogen proportion could result in higher AChE activity at higher degree of defoliation. Higher content of nitrogen in definite range contributed to reduce the carboxylesterase (CarE) activity at high intensity within short-term defoliation. However, when defoliation intensity enhanced, the difference of CarE activity between fertilizer categories was small.

2017 ◽  
Author(s):  
Sifang Wang ◽  
Tianbo Ding ◽  
Manlin Xu ◽  
Bin Zhang

Fertilizer with different ration of nitrogen (N) to phosphorus (P) could influence performance of plants including crops and vegetables. Spodoptera exigua is an important agriculture pest that has caused serious economic loss especially recent decades. In the present study, we explored that the response of host plants and S. exigua after S. exigua caterpillars damaged on the way of different level intensity and frequency under five fertilizer treatments with different ratio of N to P. The results indicated that fertilizer can significantly influence the interaction between host plants and caterpillars. Compensatory growth was detected under definite fertilizer with N : P = 3 : 1. Higher N proportion in fertilizer appears to contribute to maintain similar stem biomass in defoliated seedlings to control ones. Root biomass had almost no significant difference between defoliation and control, but it can not compensate under definite fertilizer. Higher proportion of N in fertilizer also contributed to enhance antioxidant enzymes activities: antioxidase catalase (CAT), superoxide dismutase (SOD), at low-level intensity caterpillars on host plants.However, when the herbivorous intensity was increasing, higher proportion of P in fertilizer seemed to play more important role on increase the activities of CAT and SOD. Higher phosphorus likely contributes to enhance acetylcholin esterase (AChE) activity at lower degree of defoliation, but higher nitrogen proportion could result in higher AChE activity at higher degree of defoliation. Higher content of nitrogen in definite range contributed to reduce the carboxylesterase (CarE) activity at high intensity within short-term defoliation. However, when defoliation intensity enhanced, the difference of CarE activity between fertilizer categories was small.


2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Zalika Klemenc-Ketis ◽  
Branka Cagran ◽  
Dejan Dinevski

Introduction. A “virtual patient” is defined as a computer program which simulates real patients’ cases. The aim of this study was to determine whether the inclusion of virtual patients affects the level of factual knowledge of family medicine students at the undergraduate level. Methods. This was a case-controlled prospective study. The students were randomly divided into experimental (EG: N=51) and control (CG: N=48) groups. The students in the EG were asked to practice diagnosis using virtual patients instead of the paper-based clinical cases which were solved by the students in the CG. The main observed variable in the study was knowledge of family medicine, determined by 50 multiple choice questions (MCQs) about knowledge of family medicine. Results. There were no statistically significant differences in the groups’ initial knowledge. At the final assessment of knowledge, there were no statistically significant differences between the groups, but there was a statistically significant difference between their initial and final knowledge. Conclusions. The study showed that adding virtual patient cases to the curriculum, instead of paper clinical cases, did not affect the level of factual knowledge about family medicine. Virtual patients can be used, but a significant educational outcome is not expected.


2021 ◽  
Vol 9 (22) ◽  

It is known that digits have a positive effect on the performance of short term memory (STM) span and it is called the digit superiority effect. This study aims to examine the effect of familiar stimuli (digits, colors, digit names, color names, and words) on STM span. In order to measure STM capacity, a memory span task was used including the digit, word, and color span lists. 91 participants (44 female, 47 male) aged between 18-27 (M = 21,43, SD = 1.50) participated in the study that consisted of three different experiments. Results of Experiment 1 revealed that there was a significant difference between the digit name and word with regard to span size and total span. In Experiment 2 and 3, the main effect of familiar stimulus type on total span and span size was significant, and also the difference between all types of stimuli was significant (Experiment II, digit name>word=color name; Experiment III, digit>digit name>color name>color). The common result obtained from all experiments is that digits are superior with regard to STM span than other familiar stimuli types such as words, color names, colors. This study confirmed that digit superiority effect is indispensable on verbal and visual STM span. Keywords Digit superiority, short term memory, memory span


2021 ◽  
Vol 25 (1) ◽  
pp. 22-26
Author(s):  
Raksha Amemane ◽  
Archana Gundmi ◽  
Kishan Madikeri Mohan

Background and Objectives: Music listening has a concomitant effect on structural and functional organization of the brain. It helps in relaxation, mind training and neural strengthening. In relation to it, the present study was aimed to find the effect of Carnatic music listening training (MLT) on speech in noise performance in adults.Subjects and Methods: A total of 28 participants (40-70 years) were recruited in the study. Based on randomized control trial, they were divided into intervention and control group. Intervention group underwent a short-term MLT. Quick Speech-in-Noise in Kannada was used as an outcome measure.Results: Results were analysed using mixed method analysis of variance (ANOVA) and repeated measures ANOVA. There was a significant difference between intervention and control group post MLT. The results of the second continuum revealed no statistically significant difference between post training and follow-up scores in both the groups.Conclusions: In conclusion short-term MLT resulted in betterment of speech in noise performance. MLT can be hence used as a viable tool in formal auditory training for better prognosis.


2018 ◽  
Vol 29 (7) ◽  
pp. 496-503 ◽  
Author(s):  
Emine Yılmaz ◽  
Funda Kavak

The aim of this study was to determine the effects of mindfulness-based psychoeducation on internalized stigma in patients with schizophrenia. The patients were recruited from the community mental health centers. This quasiexperimental study was conducted using pretests and posttests with a control group. The participants were 69 patients with schizophrenia; 34 were part of the experimental group and 35 were part of the control group. The patients in the experimental group participated 2 days a week for 6 weeks in a total of 12 sessions which were given in the form of face-to-face group training. The difference between the scale mean posttest scores of the patients in the experimental and control groups was found to be statistically significant ( p < .05). In the intragroup comparisons, a significant difference was found between the stigma mean scores in the experimental group ( p < .05). It was concluded that mindfulness-based psychoeducation was effective in reducing stigma in patients with schizophrenia.


2019 ◽  
Vol 24 (2) ◽  
pp. 68-75
Author(s):  
Narayan Subedi ◽  
Indra Prasad Subedi

The diversity of insect pollinators and their impact on crop yield of mustard were studied in Kusma, Parbat, Nepal from December 2018 to April 2019 in four blocks with each having 12 m2 areas. Two plots; treatment and control, were established in each block. Insect diversity was observed from 8 to 16 hrs, with the interval of an hour for three consecutive months (Jan-Feb). Eighty mustard plants were randomly selected, 40 from each plot just before flowering to find the impact of insect pollination on crop yield and these selected plants were examined for various qualitative and quantitative parameters. Altogether 16 species of pollinator insects belonging to five orders and nine families were recorded. Hymenoptera (36 %) was the most abundant order visiting mustard flowers followed by Diptera (34 %), Coleoptera (17 %), Lepidoptera (12 %) and Heteroptera (1 %). The most abundant family was Apidae (35.64 %), followed by Syrphidae (31.84 %). Apis cerana and Eristalis sp. were the most important pollinator insects of mustard. Seven species were found foraging both on pollen and nectar, four species foraging only on nectar and remaining five as casual visitors. The peak foraging activities of majority of the insects were observed between 12 hr to 14 hr. A significant difference was observed in the number of pods (59.80 ± 1.967 and 70.47 ± 2.431), fruit set (70.55 ± 1.362 and 80.94 ± 0.638), number of seeds per pods (16.70 ± 0.248 and 19.30 ± 0.330), diameter of seed (0.133 ± 0.2547 and 0.275 ± 0.0051) and weight of 100 dry seeds (0.33 ± 0.058 and 0.48 ± 0.023) in control and treatment plots whereas, the difference was non-significant in case of pod length between control and treatment plots (P=0.163).


2018 ◽  
Vol 9 ◽  
pp. 41
Author(s):  
Leo Saputra ◽  
Farisza Gita ◽  
Ratna Sari Dewi

Objective: To find out the difference in the plaque index scores of FPD users before and after using a 12.5% VCO mouthwash.Methods: The plaque index measurement of an abutment tooth was taken on 40 subjects with FPD in both test and control groups. Subjects used a 12.5% VCO mouthwash or aquades twice a day for 4 days after brushing their teeth. Statistical analysis of the measurement result of the plaque index scores before and after using the coconut oil mouthwash was done using the Wilcoxon test.Results: There is a statistically significant difference in the plaque index scores of FPD users before and after using the 12.5% VCO mouthwash with a statistically significant decrease in plaque index scores among restoration margin locations and tooth brushing habits, but not among age and gender groups.Conclusion: Using a 12.5% VCO mouthwash may decrease the plaque index of fixed prosthetic denture users.


2015 ◽  
Vol 172 (5) ◽  
pp. 553-559
Author(s):  
Ömer Akyürek ◽  
Duran Efe ◽  
Zeynettin Kaya

ObjectiveTo evaluate thoracic periaortic adipose tissue (TAT) volume in patients with subclinical hypothyroidism (SH) in comparison with controls and in relation to cardiovascular risk factors.MethodsThe study population consisted of 28 newly diagnosed SH patients (mean (s.d.) age: 37.3 (±11.4) years, 85.7% were females) and 37 healthy volunteers (mean (s.d.) age: 35.3 (±10.7) years, 81.5% were females). Comparisons between patient and control groups used demographic characteristics, anthropometrics, and laboratory findings. All participants underwent thoracic radiographic assessment in the supine position, using an eight-slice multidetector computed tomography scanner and TAT volume was measured.ResultsThe TAT volume was determined to be 27.2 (±12.7) cm3 in the SH group and 16.3 (±8.1) cm3 in the control group, and the difference was statistically significant (P<0.001). In addition, TSH levels were significantly higher in the patient group compared with the control group (P<0.001). A significant correlation was also found between TSH levels and TAT volume (r=0.572; P<0.001). In SH patients, no significant difference was noted in TAT levels with respect to sex (P=0.383) or concomitant smoking status (P=0.426).ConclusionsOur findings indicate that SH patients have significantly higher TAT values than controls and that increased TAT levels correlate with increased TSH levels.


1967 ◽  
Vol 54 (1) ◽  
pp. 155-165 ◽  
Author(s):  
Akira Arimura ◽  
Takashige Saito ◽  
Cyril Y. Bowers ◽  
Andrew V. Schally

ABSTRACT Pituitary adrenal activation in rats with hereditary hypothalamic diabetes insipidus (DI) and normal control rats (Brattleboro strain) was studied under various conditions. Plasma corticosterone concentration was essentially the same in resting DI and control rats. No significant difference in plasma corticosterone was observed after giving the animals ether, histamine, vasopressin or acetylcholine. Since DI rats lack vasopressin, these findings provide some evidence that vasopressin is unlikely to be the physiological corticotrophin releasing factor (CRF). Epinephrine induced a smaller increase in plasma corticosterone in DI rats than control animals, but the difference was not statistically significant. However, intraperitoneal injection of 0.9% saline resulted in significantly less elevation of plasma corticosterone in DI rats than normal. This suggests certain differences in responses between normal and DI rats depending upon the intensity or nature of the stress. Hypothalamic CRF in control and DI rats was determined using rats treated with chlorpromazine, morphine and Nembutal®. The CRF of hypothalami of DI rats was about half of that of control animals. In the extracts of posterior pituitary lobes, corticotrophin (ACTH) activity was found in almost the same amount in DI and control rats. The posterior pituitary lobe of DI rats lacked CRF activity when tested in neurohypophysectomized rats. Histological examination of the adrenals of DI rats revealed normal structure, suggesting normal ACTH secretion at rest.


2020 ◽  
Vol 6 (2) ◽  
pp. 196-209
Author(s):  
Melvariani Syari Batubara ◽  
Emita Sabri ◽  
Masitta Tanjung

Research the effect of andaliman leaf extract on mice ovaries, volume test material using oral gavage needles as much 0.1 ml / 10 g bb 4 days before and after estrus stage and using RAL non-factorial method consisting of control and treatment group. Treatment consisted of factor test material with dose 2500, 5000, 10000, 20000, 40000 ppm. Chemical content of andaliman leaf extract shown from results study are alkaloids, steroids and saponins. Giving treatment of andaliman leaf extract for 9 days on histological data in the number primary, secondary, De Graff, and atretic follicles experienced fluctuating changes, but statistically did not show a significant difference between treatment and control mice groups, while different results were significantly shown in the number of corpus luteum. Parameters diameter of primary follicles, De Graff, and corpus luteum tended to experience changes that fluctuated, but statistically did not show the difference between the treatment and control mice groups, while the diameter of secondary and atretic follicles showed significantly different results. From the results study, administration of andaliman leaf extract affects histological mice ovaries, because it affects oogenesis and ovulation, but fluctuates, possibly due to crude extract, which has not isolated chemical content.


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