Insecticidal activity of aqueous indigenous plant extracts against insect pests associated with cucumber (Cucumis sativus L.) in Southern Guinea Savannah Zone of Nigeria

2020 ◽  
Vol 53 (5-6) ◽  
pp. 230-246
Author(s):  
Adeola Foluke Odewole ◽  
Timothy Abiodun Adebayo ◽  
Samuel Adelani Babarinde ◽  
Gbenga Saheed Awolokun
Keyword(s):  
Cucumis Sativus ◽  
Plant Extracts ◽  
Insecticidal Activity ◽  
Insect Pests ◽  
Cucumis Sativus L ◽  
Indigenous Plant ◽  
Savannah Zone

scholarly journals DELPHINIUM LEPTOCARPUM NEVSKI AND DELPHINIUM PARADOXSUN BGE AS POTENTIAL SOURCES FOR PEST CONTROL IN CEREALS AND LEGUMES

2020 ◽  
Vol 2 (10(79)) ◽  
pp. 71-74
Author(s):  
S. Turaeva ◽  
U. Kurbanov ◽  
E. Kurbanova ◽  
S. Allakulova
Keyword(s):  
Plant Extracts ◽  
Insecticidal Activity ◽  
Insect Pests ◽  
Sitophilus Oryzae ◽  
Chloroform Extract ◽  
Alcoholic Extract ◽  
Lc50 Value ◽  
Aerial Parts ◽  
Potential Sources ◽  
Insecticidal Toxicity

In the present study, the insecticidal activity of plant extracts from the aerial parts of Delphinium leptocarpum Nevski and Delphinium paradoxsun Bge against two major important legume insect pests, cowpea weevils (Callosobruchus maculates) and the rice weevil (Sitophilus oryzae), was studied. According to the screening results, the insecticidal toxicity of the chloroform extract of plant D. leptocarpum N. showed LC50 value of 0,70 mg / mL for adult C. maculates, 0,81 mg / mL for S. oryzae, respectively. The toxicity of the alcoholic extract of D. paradoxsun B. is LC50 0,35 mg / mL for adult C. maculates, 0,39 mg/ mL for S. oryzae, respectively. Exposure to the chloroform extract of D. leptocarpum N. at concentration of 5-10 mg / mL for 24 hours resulted in 83.0100% mortality. After 48 h exposure, the pest mortality was 100%. Under the influence of an alcoholic extract of D. paradoxsun B. at dose of 5-10 mg /mL, the mortality of pests reached 99-100%. The probable use of extracts of D. leptocarpum N. and D. paradoxsun B.as bioinsecticides is discussed here.

scholarly journals Evaluation of Insecticidal Activity of Plant Extracts against Three Insect Pests

2008 ◽  
Vol 47 (1) ◽  
pp. 59-64 ◽  
Author(s):  
Jong-Ho Park ◽  
Kyung-Yul Ryu ◽  
Hyeong-Jin Jee ◽  
Byung-Mo Lee ◽  
Hyeon-Gwan Gho
Keyword(s):  
Plant Extracts ◽  
Insecticidal Activity ◽  
Insect Pests

scholarly journals Current and Emerging Pests and Diseases of Cucumber (Cucumis sativus L.) in Africa

2021 ◽  
Author(s):  
Olawale Arogundade ◽  
Titilayo Ajose ◽  
Joshua Olumide Matthew ◽  
Itunu Adeyemi Osijo
Keyword(s):  
Cucumis Sativus ◽  
Heavy Rainfall ◽  
Insect Pests ◽  
Extreme Temperatures ◽  
Cucumis Sativus L ◽  
Pests And Diseases ◽  
Humid Condition ◽  
High Incidence ◽  
The Tropics

The place of cucumber (Cucumis sativus L.) in Africa was considered insignificant for years due to its previously assumed limited uses. However, it has now gained recognition as one of the important market vegetables in the tropics because of the continued awareness of the numerous health benefits attached to its consumption. This has progressively affected its cultivation and thereby, increased outbreak of diseases and insect pests of the crop. High incidence of insect and disease infestations occur in Cucumis sativus L. due to extreme temperatures, heavy rainfall and high humid condition resulting there from, causing huge losses through reduction in yield, lowered quality of harvested produce and increased cost of production. More than 30 pests and diseases are known to contribute to the losses recorded on the crop in Africa, some of which will be discussed in this chapter.

scholarly journals Insecticidal Activity of Ageratum conyzoides (Asteraceae) Aqueous Extracts against the Grasshopper Zonocerus variegatus (Orthoptera: Pyrgomorphidae)

2020 ◽  
pp. 29-36
Author(s):  
Dongmo Tonleu Ingrid ◽  
Seino Richard Akwanjoh ◽  
Manjeli Yacouba
Keyword(s):  
Mortality Rate ◽  
Plant Extracts ◽  
Insecticidal Activity ◽  
Insect Pests ◽  
Aqueous Extracts ◽  
Zonocerus Variegatus ◽  
Ageratum Conyzoides ◽  
Treatment Results ◽  
Male Mortality ◽  
Percent Mortality

Ageratum conyzoides (Asteraceae) is an annual plant with insecticidal activity against some insect pests. The present study was designed to evaluate the insecticidal activity of aqueous extracts (infusion and maceration) of A. conyzoides against the pest grasshopper Zonocerus variegatus (Orthoptera, Pyrgomorphidae). Concentrations of 0, 10, 30, 100 & 300 µg/ml were prepared and administrated through injection to grasshoppers. Mortality rate was recorded for adult grasshoppers each day until the 9th day of treatment. Results revealed a significant increase (p < 0.05) of mortality rate with increasing concentrations of the two plant extracts. Plant extracts at 300 µg/ml induced 100.00 ± 0.00 percent mortality of adults Z. variegatus after 4 and 5 days for A. conyzoides infusion and maceration respectively. No mortality was registered after treatment with 0 & 10 µg/ml of the two plant extracts. Male mortality rate tended to be higher than that of female at the same concentration. Also, infusion tended to significantly increase (p < 0.05) mortality rate than maceration at the same concentration. Phytochemicals screening have shown that the presence of saponins, tannins, triterpenoids and alkaloids in the A. conyzoides aqueous extracts may be responsible for the insecticidal activity of this plant. These phytochemicals may therefore be exploited and serve as suitable alternatives to synthetic insecticides against the grasshopper Z. variegatus.

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