scholarly journals Efficacy of Major Plant Extracts/Molecules on Field Insect Pests

2014 ◽  
pp. 63-88 ◽  
Author(s):  
S. Gopalakrishnan ◽  
B. Ratna Kumari ◽  
R. Vijayabharathi ◽  
A. Sathya ◽  
V. Srinivas ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Insect Pests

scholarly journals Field evaluation of water plant extracts on sucking insect pests and their associated predators in transgenic Bt cotton

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Muhammad Arshad ◽  
Muhammad Irfan Ullah ◽  
Naciye Sena Çağatay ◽  
Asad Abdullah ◽  
Fatma Dikmen ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Insect Pests ◽  
Field Evaluation ◽  
Bt Cotton ◽  
Transgenic Bt Cotton ◽  
Water Plant

Effect of plant extracts on insect pests of common beans

1986 ◽  
Vol 102 (1-5) ◽  
pp. 164-169 ◽  
Author(s):  
H. Hongo ◽  
A. K. Karel
Keyword(s):  
Plant Extracts ◽  
Insect Pests ◽  
Common Beans

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 Insecticidal and Repellant Activities of Southeast Asia Plants towards Insect Pests: A Review

2020 ◽  
Vol 32 (5) ◽  
pp. 1026-1032
Author(s):  
N.H. Albariman ◽  
S.F. Sabran ◽  
N.W. Othman ◽  
N. Ishak ◽  
A.S. Dheyab ◽  
...  
Keyword(s):  
Southeast Asia ◽  
Plant Species ◽  
Plant Extracts ◽  
Insect Pests ◽  
Cultivated Plants ◽  
Active Constituents ◽  
Plant Pests ◽  
Synthetic Pesticides

Crops are being damaged by several plant pests. Several strategies have been developed to restrict the damage of cultivated plants by using synthetic pesticides and repellants. However, the use to control these insects is highly discouraged because of their risks on humans. Therefore, several alternatives have been developed from plant extracts to protect crops from plant pests. Accordingly, this review focuses on outlining the insecticidal and repellant activities of Southeast Asia plants towards insect pests. Several extracts of plants from Southeast Asia were investigated to explore their insecticidal and repellant activities. Azadiracha indica (neem) and Piper species were highly considered for their insecticidal and repellant activities compared to other plants. This review also addressed the investigation on extracts of other plant species that were reported to exert insecticidal and repellant activities. Most of the conducted studies have been still in the primarily stage of investigation, lacking a focus on the insecticidal and repellant spectrum and the identification of the active constituents which are responsible for the insecticidal and repellant activity.

scholarly journals Control of field insect pests of mung bean (Vigna radiata L. Wilczek) using some plant extracts in Umudike, Nigeria

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Elechi F. Asawalam ◽  
Ekemezie Constance
Keyword(s):  
Plant Extracts ◽  
Azadirachta Indica ◽  
Vigna Radiata ◽  
Mung Bean ◽  
Insect Pests ◽  
Curcuma Longa ◽  
Block Design ◽  
Field Trials ◽  
Population Densities ◽  
Cropping Seasons

Field trials were conducted at Umudike, Nigeria, during the 2015 and 2016 cropping seasons to determine the efficacy of plant extracts from seven plant species against field insect pests of mung bean, Vigna radiata L. Wilczek. The extracts tested were obtained from scent leaf (Ocimum gratissimum), neem leaf (Azadirachta indica), bitter leaf (Vernonia amygdalina), garlic (Allium sativum), turmeric (Curcuma longa), plantain (Musa paradisiaca) peel and Negro pepper (Xylopia aethiopica). Karate (Lambda-cyhalothrin EC) at 50 mL was introduced as a check in the trials. The experimental design was a randomised complete block design (RCBD) with three replicates. Data were collected weekly on the insect population densities, yield and yield components. The results indicated that all the treatments were effective against mung bean insect pests (Aphis craccivora [aphid], Bemisia tabaci [whitefly], Amrasca biguttula biguttula [jassid] and Zonocerus variegatus[grasshopper]). There was a significant (p ≤ 0.05) reduction in the population of insects on the plots treated with plant extracts and karate in 2015 and 2016 cropping seasons. The population densities of grasshoppers in 2015 and whitefly in 2016 were significantly lower in the treated plots compared with the control plots. Azadirachta indica and C. longa extracts recorded the highest seed yield of 50.00 kg/ha and 42.33 kg/ha in 2015 and 2016, respectively. No significant differences were observed between the plant extracts and karate, which recorded significantly higher yields when compared with the control (23.30 kg/ha). All the plant extracts used exhibited insecticidal activity against the insect pests of mung bean. It is, therefore, recommended that these plant extracts can be used for the control of mung bean insect pests to achieve sustainable production, food security and quality.

scholarly journals Usage of biopesticides in agriculture practices

2020 ◽  
Vol 46 (3) ◽  
pp. 8301-8317
Author(s):  
Sanae BENANI ◽  
Aziz BOUCHELTA ◽  
Sanae AMINE
Keyword(s):  
Plant Extracts ◽  
Natural Enemies ◽  
Insect Pests ◽  
Urtica Dioica ◽  
High Price ◽  
Subsistence Farmers ◽  
Small Fields ◽  
Synthetic Pesticides ◽  
Peasant Farmers

Using pesticides is the first method to control diseases and kill pests and weeds, which are the most menacing and the biggest problem facing agriculture. It is commonly used by developing since it is the solution to increase yields and solve agriculture problems. A part from big farmers, the majority of peasant farmers are unable to pay for synthetic pesticides because of their high price. Moreover, the small fields cultivated by subsistence farmers making the use of such pesticides uneconomic. In morocco, peasant farmers use even pesticides, which are over dose or they use non-certified products. It is understood that it is very harmful for human health and environment as well. Therefore, pesticide plants do not eliminate all pests, but keep their populations under the threshold of harm, and have more advantages than synthetic pesticides. Moreover, pesticide plant extracts decompose rapidly in the environment; which limits the risk of environmental pollution and improves the sanitary quality of cultivated products; also, it controls insect pests by protecting their natural enemies rather than by spraying crops with synthetic pesticides. The aim of this study is to record all products used by farmers to control Bruchus rufimanus especially the use of bio pesticides around Meknes city (Mejjat and Sebet jahjouhe area). It was established that most of big peasant farmers use synthetic pesticides. While small farmers have only access to traditional methods such as Capsicum frutescent, Urtica dioica, salt and ash wood, if not using non-certified products among which rodenticides.

scholarly journals Comparative Efficacy of Plant Extracts with Synthetic against Insect Pests of Okra (Abelmoschus esculentus L. Monech)

2014 ◽  
Vol 19 ◽  
pp. 52-58 ◽  
Author(s):  
Adeola Foluke Odewole ◽  
Fatai Olaitan Alao ◽  
Adedayo Akeem Agboola ◽  
Bolawaye Folakemi Adedapo
Keyword(s):  
Synergistic Effect ◽  
Plant Extract ◽  
Plant Extracts ◽  
Insect Pests ◽  
Block Design ◽  
Comparative Efficacy ◽  
Synthetic Insecticide ◽  
Randomized Complete Block Design ◽  
Cropping Seasons ◽  
Better Than

A field study was carried out during the two cropping seasons of okra to investigate the efficacy of plant extracts and synthetic insecticides applied singly and synergistic effect of botanicals with the synthetic insecticide on some insect pests of okra. Plots were arranged in a Randomized Complete Block Design (RCBD), with three replications. Three insect pests of okra (Podagrica uniformis, Podagrica sjostedti and Zenocerous variegatus) were observed on the field. Cypermethrin applied singly and Cypermethrin combined with plant extracts effectively controlled observed insect pests, followed by lone application of plant extracts (L camara, T. vogelii and Z. officinales plant extracts at 1st and 2nd season. Okra yield revealed that both plant extract and Cypermethrin combined with plant extract were not significantly different from one another at first season and at second season Cypermethrin combined with plant extracts performed better than Cypermethrin applied singly. This study indicates that the studied plant extracts can be good synergist for Cypermethrin in controlling field pest of okra.

scholarly journals Field Evaluation of Plant Extracts for the Control of Diamond Moth (Plutella xylostella Linnaeus) Infesting Cabbage (Brassica oleracea Linn)

2014 ◽  
Vol 16 ◽  
pp. 164-178
Author(s):  
Adeola Foluke Odewole ◽  
Timothy Abiodun Adebayo
Keyword(s):  
Brassica Oleracea ◽  
Plant Extracts ◽  
Field Experiments ◽  
Insect Pests ◽  
Block Design ◽  
Diamondback Moth ◽  
Field Evaluation ◽  
Significant Difference ◽  
Unsprayed Plot ◽  
Negative Controls

Cabbage (Brassica oleracea Linn.) is one of the important vegetables grown worldwide. Insect pests have been a major constraint to its production with some reported to have developed resistance to commonly available synthetic insecticides. In order to find alternative control for these pests, field experiments were conducted in the early seasons of 2011 and 2012, to evaluate the efficacy of three plant extracts, Tephrosia vogelli Hooks, Zingiber officinales Rosh and Lantana camara Spanish flag, applied at 5, 10 and 25 % w/v concentrations Delthamethrin (a synthethic insecticide) and an unsprayed plot were included as positive and negative controls respectively. Plots were arranged in a Randomized Complete Block Design (RCBD), with three replications. Mean Data over the two planting seasons were subjected to the analysis of variance and significant means were compared using the least significant difference (L.S.D) at P < 0.05. Z. officinales extract effectively control P. xylostella larvae at all concentrations with 25 % w/v gave the best yield of 0.50 kg/ha while T. vogelii and L. camara extracts were as effective as Deltamethrin at different concentrations and hours on diamondback-moth (P. xylostella) adult The present findings indicated that effective botanicals against Diamondback moth adult and larvae of cabbage can be formulated from extract of T. vogelii, L. camara and Z. officinales at 25 % concentration respectively.

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