scholarly journals Insecticidal activity of Spinosad and Emamectin and Their Mixture with Different Types of Inert Dusts against Khabra Larvae Trogoderma granarium Everts

2019 ◽  
Vol 32 ◽  
pp. 266-275
Author(s):  
Nabil M. Almallah ◽  
Ahmed M. Jihad
Keyword(s):  
Silica Gel ◽  
Insecticidal Activity ◽  
Trogoderma Granarium ◽  
Inert Dusts ◽  
Different Types

The study showed that the highest activation percentage of the insecticides (Spinosad, Emamectin and the mixture of the insecticides) were obtained when mixed with silica gel for the larvae grown on the corn (2.266, 1.255 and 1300 respectively), while the lowest activation percentage (Antagonism) was recorded for the mixture of each of the Spinosad and Emamectin separately with the gypsum of the larvae grown on the wheat giving 0.776 and 0.989, respectively. The highest of synergism percentage was for silica gel when mixed with each of Spinosad, Emamectin and the mixture of insecticide against the larvae which grown on corn reached 2.014, 1.178 and 1.256 respectively; the lowest of synergism percentage was for gypsum when mixed with the Spinosad and the insecticide mixture against larvae grown on the wheat, which reached 0.454 and 0.918 respectively, while the ratio was 0.841 for the Emamectin insecticide when mixed with the limestone against the larvae which grown on wheat. For the percentage of potentiation, the study showed that the treatment of larvae grown on wheat and corn which treated with a mixture (silica gel and Spinosad insecticide) gave the highest percentage of the potentiation of the pesticide reached 0.41 and 0.252 respectively, and the lowest potentiation percentage of larvae on wheat and maize was recorded for gypsum with the mixture of insecticides reaching 0.082 and 0.016 respectively.

scholarly journals Erratum

2014 ◽  
Vol 11 (2) ◽  
pp. 114
Author(s):  
The Editor
Keyword(s):  
Plant Extracts ◽  
Insecticidal Activity ◽  
Trogoderma Granarium

In the paper entitled “Insecticidal Activity of Some Plant Extracts Against Trogoderma granarium (E.)” published in The Agriculturists 11(1): 103-111 (June 2013), the authors should be read as Farooq Ahmad, Muhammad Sagheer, Ahmad Hammad, S. M. Mizanur Rahman and Mansoor-Ul-Hasan instead of Farooq Ahmad, Muhammad Sagheer, Ahmad Hammad, S. M. Mizanur Rahman and Masoor-Ul-Hasan. DOI: http://dx.doi.org/10.3329/agric.v11i2.17498 The Agriculturists 2013; 11(2) 114

Quantitative Fluorodensitometric Measurements of Aflatoxin B1 with a Flying-Spot Densitometer. I. Fluorodensitometric Study of the Behavior of Aflatoxin B1 Standard Spots on Different Types of Silica Gel

1972 ◽  
Vol 55 (4) ◽  
pp. 775-780
Author(s):  
P R Beljaars ◽  
F H M Fabry
Keyword(s):  
Formic Acid ◽  
Silica Gel ◽  
Aflatoxin B1 ◽  
Amyl Alcohol ◽  
Coefficients Of Variation ◽  
Different Types ◽  
Tlc Plates ◽  
The Relationship ◽  
Flying Spot

Abstract TLC plates were scanned after development with a reflectance flying-spot densitometer. The procedure for routine measurements of standard B1 spots is described herein. Three different types of silica gel layers were spotted with standard aliquots of aflatoxin B1 covering a range of 0.4–20 ng. Silica gel H plates were developed with a mixture of chloroform– trichloroethylene–n-amyl alcohol–formic acid (80 + 15 + 4 + 1), while silica gel G and MNG- HR plates were developed with a mixture of chloroform-acetone (90 + 10). Sharp and defined separation patterns for anatoxins B1, B2, G1, and G2 were recorded on H and MN-G-HR plates, while unsatisfactory separation was found on G plates. The relationship between peak area and concentration was linear for II and MN-G-IIR plates, but not for G plates. Variations of ±15–20% were calculated among the fluorescence of standard B1 spots between plates with same sorbent layers. Coefficients of variation of ±5–7% for single densitometric measurements on one plate under normal routine conditions were calculated for a series of 3 or 4 standard aflatoxin B1 spots ranging from 1 to 4 ng on H and MN-GHR plates. Coefficients of variation of ±11–12% were calculated for G plates. Results obtained in this investigation are compared with those found by previous investigators.

scholarly journals Euphorbia bupleuroides Desf. latex as biopesticide against the red flour beetle (Tribolium castaneum [Herbst, 1797]) and khapra beetle (Trogoderma granarium Everts, 1898)

2021 ◽  
Vol 117 (2) ◽  
pp. 1
Author(s):  
Imene BRIK ◽  
Naama FRAH
Keyword(s):  
Ambient Temperature ◽  
Tribolium Castaneum ◽  
Insecticidal Activity ◽  
Direct Contact ◽  
The Other ◽  
Red Flour Beetle ◽  
Laboratory Evaluation ◽  
Flour Beetle ◽  
Trogoderma Granarium ◽  
Khapra Beetle

<p>Laboratory evaluation of Euphorbia bupleuroides latex as biopesticide against the red flour beetle (Tribolium castaneum) and khapra beetle (Trogoderma granarium) were evaluated at ambient temperature. The insecticidal activity of latex was determined by direct contact application. Different concentrations were prepared by dilution of 2.5, 5.0, 7.0 and 10.0 µl of latex into 0.1 ml acetone. 1 µl was pumped regularly in the thorax of different insects. The latex of E. bupleuroides showed insecticidal activity against T. granarium and T. castaneum. High levels of mortality were associated with the increase in the concentration and time of exposure as well. T. granarium adults are generally more prone to latex insecticidal effects than T. castaneum adults. After 6 days of exposure to E. bupleuroides latex, the LC50 recorded was 14.12 µl for T. granarium adults, and 14.7 µl for T. castaneum. LC90 numbers, on the other hand, were 38.8 µl for the former, and 51.44 µl for the latter.</p>

scholarly journals Insecticidal Components from the Essential Oil of Chinese Medicinal Herb,Ligusticum chuanxiongHort

2011 ◽  
Vol 8 (1) ◽  
pp. 300-304 ◽  
Author(s):  
Sha Sha Chu ◽  
Guo Hua Jiang ◽  
Zhi Long Liu
Keyword(s):  
Essential Oil ◽  
Silica Gel ◽  
Insecticidal Activity ◽  
Chromatographic Separation ◽  
Medicinal Herb ◽  
Sitophilus Zeamais ◽  
Contact Toxicity ◽  
Chinese Medicinal Herb ◽  
Ligusticum Chuanxiong ◽  
Main Components

Essential oil of Chinese medicinal herb,Ligusticum chuanxiongdried rhizome was found to possess insecticidal activity against maize weevils, Sitophilus zeamais. The main components ofL. chuanxiongessential oil wereZ-3-butylidenephthalide (20.56%),Z-ligustilide (19.61%), 4-terpinenol (8.82%), 4-vinylguaiacol (6.81%) andα-selinene (6.01%). Bioactivity-guided chromatographic separation of the essential oil on repeated silica gel columns led to isolate three compounds namely 3-butylidenephthalide,Z-ligustilide and 4-vinylguaiacol.Z-liqustilide andZ-3-butylidenephthalide showed pronounced toxicity againstS. zeamais(LD50= 10.23 and 15.81 μg/adult respectively) and were more toxic than 4-vinylguaiacol (LD50= 63.75 μg/adult). The crude essential oil also possessed contact toxicity against S. zeamais (LD50= 13.09 μg/adult).

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