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1

Regulation of wound-responsive calcium-dependent protein kinase from maize (ZmCPK11) by phosphatidic acid

100%

Klimecka M., Szczegielniak J., Godecka L., Lewandowska-Gnatowska E., Dobrowolska G., Muszyńska G.

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2011

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vol. 58

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issue 4

589-595

EN

In plant cells, phospholipids are not only membrane components but also act as second messengers interacting with various proteins and regulating diverse cellular processes, including stress signal transduction. Here, we report studies on the effects of various phospholipids on the activity and expression of maize wound-responsive calcium-dependent protein kinase (ZmCPK11). Our results revealed that in leaves treated with n-butanol, a potent inhibitor of phosphatidic acid (PA) synthesis catalyzed by phospholipase D, a significant decrease of ZmCPK11 activity was observed, indicating contribution of PA in the kinase activation. Using lipid binding assays, we demonstrate that among various phospholipids only saturated acyl species (16 : 0 and 18 : 0) of phosphatidic acid are able to bind to ZmCPK11. Saturated acyl species of PA are also able to stimulate phosphorylation of exogenous substrates by ZmCPK11 and autophosphorylation of the kinase. The level of ZmCPK11 autophosphorylation is correlated with its enzymatic activity. RT-PCR analysis showed that transcript level of ZmCPK11 in maize leaves increased in response to PA treatment. The influence of PA on the activity and transcript level of ZmCPK11 suggests an involvement of this kinase in a PA-mediated wound signal transduction pathway.

2

Efficiency of botanical extract against maize weevil Sitophilus zeamais (Motschulsky, 1855) (Coleoptera: Curculionidae)

86%

Khanal S., Adhikari A., Tiwari A., Singh N. B., Subedi R.

World News of Natural Sciences

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2019

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vol. 24

1-8

EN

With the objective of studying the efficiency of locally available botanical extract on maize weevil, a lab experiment was conducted from Feb 3 to Feb 20 2017, at the entomology lab of Gokuleshwor Agriculture and Animal Science College, Gokuleshwor, Baitadi. The design setup was that of a completely randomized design, with 10 treatments, each treatment was replicated thrice. Two varieties of maize local and a commercial hybrid were treated with five locally available botanical extracts, i.e. Acorous, Rittha, Neem, Asuro and wood ash to examine the efficiency of these on maize weevil. One kilogram of maize grains adjusted to 14% MC was placed in 20 cm high × 8 cm diameter plastic buckets. 10 gram of the powdered botanical pesticides of each of the test materials was then thoroughly mixed with the grains in each bucket. The mortality rate was recorded at 24 hours interval. Herein, Acorous showed the highest mortality rate in both local and hybrid varieties. The order of efficiency was found to Bhojo, Ritha, Ash, Neem and Asuro.

3

Economics analysis of maize hybrid influenced by tillage method and planting density

86%

Thapa S. B., Shrestha P., Basnet K. B., Aryal K.

World News of Natural Sciences

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2019

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vol. 24

71-78

EN

The experiment was laid out in a strip-split plot design consisting of 16 treatments with three replications, at NMRP, Rampur, Chitwan during the winter season (October, 2015 to March, 2016). Four different levels of planting geometry (60 cm×30 cm, 60 cm×24 cm, 60 cm×19.5 cm and 60 cm×16.5 cm, representing 55,555, 69,444, 85,470 and 1,01,010 plants ha-1, respectively), two hybrid varieties of maize (Rampur hybrid 4 and Rampur hybrid 6) and two tillage methods (conventional and zero tillage) were used as the treatments. Economic analysis revealed that significantly higher net benefit (NRs. 1,06,692 ha-1) was obtained with 85 rather than 55 thousand plants ha-1 (NRs. 79,249 ha-1), but remained at par with 69 (NRs. 92,656 ha-1) and 101 (NRs. 96,198 ha-1) thousand plants ha-1. Moreover, the B:C ratio was higher in 85 (2.57) than 55 (2.28), 69 (2.43) and 101 (2.35) thousand plants ha-1. The net returns and B:C ratio (NRs. 97,372 and 2.46) obtained from Rampur hybrid 6 were also higher, but statistically at par with Rampur hybrid 4 (NRs. 90,024 and 2.35), respectively. In addition, net returns and B:C ratio obtained from zero tillage (NRs. 1,03,473 and 2.6) were better than conventional tillage (NRs. 83,924 and 2.22). Thus, both hybrid maize varieties (Rampur hybrid 4 and Rampur hybrid 6) can be successfully grown under a zero tillage system with optimum plant population of 85 thousand plants ha-1 to achieve higher grain yield and better winter season net returns in western Chitwan, Rampur, Nepal.

4

Assessment of the tank mixture of mesotrione and pethoxamid plus terbuthylazine efficacy for weed control in maize (Zea mays L.)

86%

A S. G., Pudełko J. A., Waniorek W.

Journal of Plant Protection Research

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2007

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vol. 47

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issue 4

5

Survival analysis of maize weevil Sitophilus zeamais Motschulsky 1855 (Coleoptera: Curculionidae) exposed to some medicinal plant powders

86%

Nsobinenyui D., Mbafor L. F., Mensiy W. S., Abdulai A. N., Mapiemfu-Lamare D., Sama V., Achiri D. T., Njualem D. K.

World News of Natural Sciences

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2022

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vol. 43

126-137

EN

Maize weevil (Sitophilus zeamais) is a very destructive pest of stored maize, accounting for about 15 – 25 % of loss, and sometimes 100% in severe infestation. Synthetic pesticide is often the first step of control, which is often costly, scarce, detrimental to the environment and human health. As a result, more environmentally friend options like the use of botanicals are encouraged, in line with the United Nation Sustainable Development Goals. The purpose of this study was to assess how fast to kill and how hazardous are four medicinal plant powders on maize weevil. The study was conducted in June-July, 2020 in the Food Science laboratory of Catholic University of Cameroon, Bamenda. Plant powders of pawpaw Carica papaya seeds, cypress Cupressus macrocarpa leaves, piper Piper nigrum seeds and a control (no-input) were assessed. Mortality was observed every 48 hr for 192 hr (8 days). The data was subjected to survival analysis using SPSS ver. 23. The proportion of Event (mortality) and Censored (no mortality) at varied amongst treatment with Event in piper significantly higher ((χ2 = 26.2, df = 7, P < 0.001) than Censored, and the reverse was the case for the other treatments. Only the piper treatment had 50% lethal time (LT50) of 144 hr. The Kaplan-Meier survival probability curve of piper had many sharp drops unlike the flat curves for control and pawpaw. Hazard ratios were 0.553, 2.47and 0.819 for pawpaw, piper and cypress, respectively. We proposed the possibility of exploring the angle formed between the line linking both ends of the survival curve and the horizontal line linking the end of the survival curve and the y-axis to assess the degree of hazardousness. The findings of this study revealed that piper powder killed the maize weevil very fast and was also the most hazardous treatment. We strongly recommend the integration of piper seed powder in the management of stored maize in order to prolong the shelve life, and maintain the quality and quantity of stored maize.

6

Effect of wood ash, river sand, mineral oil and dry pepper (Capsicum spp) dust on the population of Sitophilus zeamais (Motschulsky, 1855) (maize weevil) in maize grain storage

58%

Adiaha M., Agba O., Obio E., Undie U., Asuquo O.

World News of Natural Sciences

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2018

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vol. 18

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issue 2

241-251

EN

An experiment to evaluate the effect of wood ash, river sand, mineral oil and dry pepper (Capcium spp) dust on the population (control) of Sitophilus zeamais (Motschulsky, 1855) (Coleoptera: Curculionidae) (maize weevil) was conducted. The experiment was laid out in a Completely Randomized Design (CRD) consisting of five (5) treatments; 0g, 5g river sand, 5g dry pepper dust, 5g wood ash and 5g mineral oil. All treatment were replicated three times. Data were taken on the number of population of Sitophilus zeamais emerging from individual treatments. Herein, weight loss on grain maize was taken for S. zeamais infestation. The effect of the various treatments on maize seed with S. zeamais was not significant (P>0.05), although the highest population numbers of the weevil was recorded in the control (0g). Zero population of S. zeamais was recorded in wood ash treatment at 5g, which significantly (P<0.05) protected the grains over the control. Significant (higher) weight loss was recorded in the control since no treatment was applied. All treatments except the control indicate the potential of reducing (controlling) weevil numbers. Data obtained in these experiments reveal that wood ash, pepper dust and river sand produced the most protective/control effect on the population of the weevil over the control. Result of the study show that river sand, pepper dust, wood ash and mineral oil (vegetable oil) performed positively, and hence, exert protectant properties on maize grains.

Refine search results

Regulation of wound-responsive calcium-dependent protein kinase from maize (ZmCPK11) by phosphatidic acid

Efficiency of botanical extract against maize weevil Sitophilus zeamais (Motschulsky, 1855) (Coleoptera: Curculionidae)

Economics analysis of maize hybrid influenced by tillage method and planting density

Assessment of the tank mixture of mesotrione and pethoxamid plus terbuthylazine efficacy for weed control in maize (Zea mays L.)

Survival analysis of maize weevil Sitophilus zeamais Motschulsky 1855 (Coleoptera: Curculionidae) exposed to some medicinal plant powders

Effect of wood ash, river sand, mineral oil and dry pepper (Capsicum spp) dust on the population of Sitophilus zeamais (Motschulsky, 1855) (maize weevil) in maize grain storage