Evaluation of varying concentrations of neem seed extracts in the control of cowpea scab (Sphaceloma SP.)

2018 ◽  
Vol 13 (06) ◽  
pp. 146-154
Keyword(s):  
Neem Seed ◽  
Seed Extracts

Effectiveness of Some Plant Materials against Jute Yellow Mite on Corchorus Olitorius

2021 ◽  
Vol 12 (1-2) ◽  
pp. 165-170
Author(s):  
B Akter ◽  
M Ali ◽  
MN Islam
Keyword(s):  
Field Condition ◽  
Seed Extract ◽  
Seed Kernel ◽  
Corchorus Olitorius ◽  
Neem Seed ◽  
Polyphagotarsonemus Latus ◽  
Plant Materials ◽  
Neem Leaf Extract ◽  
Powder Extract ◽  
Seed Extracts

An experiment was conducted to evaluate the effectiveness of plant materials against yellow mite (Polyphagotarsonemus latus) on jute (Corchorus olitorius) cv. 0–9897 in both greenhouse and field condition at BJRI during the period from March to October 2016. In greenhouse premises, the highest mortality (69.39, 67.77, 63.86, 62.43 and 61.47%) was recorded in extract of neem seed kernel @ 1:20, mehogony seed, pithraj seed, turmeric powder and green neem leaf, respectively. In field condition, the highest reduction (70.20%) of infestation over control, lowest nodes plant–1 (52.50), tallest plant (3.10 m) and highest yield increased (38.60%) over control were observed in neem seed kernel extract @ 1:20. In conclusion, neem seed kernel extract, mahogany seed extracts, pithraj seed extract, green neem leaf extract and turmeric powder extract @ 1:20 can be safely used by the farmers as components of IPM program of Jute. Environ. Sci. & Natural Resources, 12(1&2): 165-170, 2019

The efficacy of neem seed extracts (Tre-san®, MiteStop®) on a broad spectrum of pests and parasites

2010 ◽  
Vol 107 (2) ◽  
pp. 261-269 ◽  
Author(s):  
Günter Schmahl ◽  
Khaled A. S. Al-Rasheid ◽  
Fathy Abdel-Ghaffar ◽  
Sven Klimpel ◽  
Heinz Mehlhorn
Keyword(s):  
Broad Spectrum ◽  
Neem Seed ◽  
Seed Extracts

scholarly journals Predatory Capacity and Feeding Preference of Pesticide-Resistant Amblyseius deleoni Muma et Denmark (Mesostigmata: Phytoseiidae)

2021 ◽  
Vol 18 (24) ◽  
pp. 1441
Author(s):  
Bambang Heru Budianto ◽  
Rokhmani Rokhmani ◽  
Edi Basuki
Keyword(s):  
Copper Oxide ◽  
Feeding Preference ◽  
Predatory Mites ◽  
Continuous Exposure ◽  
Neem Seed ◽  
Wild Type ◽  
Tea Plantations ◽  
Synthetic Pesticides ◽  
Predatory Capacity ◽  
Seed Extracts

The population of the predatory mites Amblyseius deleoni had been decreasing due to continuous use of synthetic pesticides in tea plantations. Therefore, this study aimed to select pesticide-resistant individuals from a wild-type population of A. deleoni and to evaluate whether or not the resistant A. deleoni were still sensible as biological control agents.  We exposed A. deleoni to (propargite), fungicide (copper oxide) and a neem seed extracts. We found that the propargite-resistant predatory mites consumed larvae and nymphs of Tetranychus urticae more than the control (wild type) (P < 0.05).  There was no difference in the number of eggs and adults of T. urticae consumed (P > 0.05). The number of individuals of every stage of T. urticae consumed by copper-oxide resistant A. deleoni was the same (P > 0.05).  In general, there were no changes in food preference in the resistant predators to the 3 of pesticides (P > 0.05). There were slight differences on the pattern of predatory capacity among the resistant predators to the three pesticides.  Although the predators are resistant to the 3 pesticides, it took longer to consume their prey in comparison to the control.  These findings suggested that pesticide-resistant A. deleoni were able to maintain their functions as a biocontrol agent. HIGHLIGHTS The effectiveness of Amblyseius deleoni as a natural predators have decreased due to continuous uses of synthetic pesticides to control pests and diseases on tea plantations Continuous exposure to propargite, CuO and neem seed extracts induced the predatory mites deleoni to develop resistance No significant changes in feeding preference and the predatory capacity of the mite deleoni on T. urticae after becoming resistant to pesticides Exposures deleoni to pesticides may have induced heritable epigenetic changes permanently or just reversible phenotypes without changing the DNA sequence

scholarly journals Effectiveness of Ethanol Extract of Neem, Mahogany and Surian Seeds on Tenebrio molitor Linnaeus Larva (Tenebrionidae : Coleoptera)

2020 ◽  
Vol 31 (1) ◽  
pp. 40
Author(s):  
Wida Darwiati ◽  
Ujang Wawan Darmawan ◽  
Cheppy Syukur
Keyword(s):  
Block Design ◽  
Ethanol Extract ◽  
Tenebrio Molitor ◽  
Seed Extract ◽  
Phytochemical Analysis ◽  
Neem Seed ◽  
Botanical Insecticide ◽  
Extract Concentration ◽  
Seed Extracts ◽  
Significant Mortality

<em>Neem, mahogany, and surian seeds contain secondary metabolites that can be used as biopesticides. This study aimed to determine the effectiveness of neem, mahogany, and surian seed extracts to the larvae of the </em>Tenebrio molitor<em> L. (Tenebrionidae: Coleoptera) </em><em>at laboratory scale. The stages of the research were the preparation of seed extracts, phytochemical analysis of the extracts, and efficacy of extracts against </em>T. molitor<em> larvae. Dried seeds of neem, sur</em><em>ian, and mahogany (water content &lt; 10%) were ground (100 mesh) and macerated with 95% ethanol solvent for seven hours at 70 <sup>o</sup>C. The alkaloids, flavonoids, tannins, saponins, and steroids/the triterpenoid were then analyzed. The effectiveness of the extracts was  tested</em><em>against the 3<sup>rd</sup> larva of </em>T. molinor<em>. The experiment</em><em> designed in Randomize block design, three replications, each with ten larvae. The first factor was seed extracts (neem, surian, and mahogany), while the second factor was five levels of extract concentration (</em><em>0 mg;l<sup>-1</sup>, 9 mg.l<sup>-1</sup>, 15 mg.l<sup>-1</sup>, 30 mg.l<sup>-1</sup> and 45 mg.l<sup>-1</sup>). Phytochemical analysis showed that mahogany seeds contained alkaloids and triterpenoids. Meanwhile, surian seeds contained tannin, alkaloid, steroid/triterpenoid, but neem seeds contained saponin and alkaloids. The mahogany, surian, and neem seed  extracts were effective in causing significant mortality to </em>T. molitor<em> larvae. Ethanol extract of neem seeds was more toxic to larvae (LC<sub>50</sub> = 0.72 mg.l<sup>-1</sup>), compared to mahogany (LC<sub>50</sub> = 5.2 mg.l<sup>-1</sup>) and sur</em><em>ian (LC<sub>50</sub> = 7.02 mg.l<sup>-1</sup>). Mimba seed extract is more prospective to be developed as a botanical insecticide.</em>

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