scholarly journals Incidence of spiraling whiteflies Aleurodicus dspersus Russell (Hemiptera: Aleyrodidae) and its natural enemies on guava orchards

2018 ◽  
Vol 24 ◽  
pp. 67-74
Author(s):  
M Arifunnahar ◽  
Z Ferdous ◽  
MA Alim ◽  
MA Hossain
Keyword(s):  
Pest Control ◽  
Natural Enemies ◽  
Seasonal Abundance ◽  
Egg Mass ◽  
Control Methods ◽  
Mould Fungus ◽  
Sooty Mould ◽  
Insect Density ◽  
Number Of Leaves ◽  
Pest Control Methods

Population dynamics of spiraling whitefly and its natural enemies on guava orchards are essential for improvement of existing pest control methods. To find out the seasonal abundance of guava whitefly and its natural enemies and levels of infestations were studied on guava orchards severely infested by A. dispersus. Five guava plants were selected randomly. To determine each stage of the insect density, six leaves comprising upper, middle and lower part of each plant were randomly sampled. Sooty mould infested leaves and presence of natural enemies of A. dispersus were also recorded. The highest number of egg mass (5.0) and nymphs (10.0) per leave were found in the month of September. The highest (0.20%) ladybird beetle, Scymnus sp. (Coccinellidae: Coleoptera) and Encarsia sp. (0.15%) were found in the months of October and January, respectively. The number of leaves infested with sooty mould fungus was estimated highest (93%) during October to January. A. dispersus population was peak in the months of August to January and the associated natural enemies may successfully contribute to the existing pest control methods.J. bio-sci. 24: 67-74, 2016

Alterations in honey bee gut microorganisms caused byNosemaspp. and pest control methods

2018 ◽  
Vol 75 (3) ◽  
pp. 835-843 ◽  
Author(s):  
Tsiri Diaz ◽  
Ek del-Val ◽  
Ricardo Ayala ◽  
John Larsen
Keyword(s):  
Honey Bee ◽  
Pest Control ◽  
Control Methods ◽  
Gut Microorganisms ◽  
Pest Control Methods

In vitro test systems supporting the development of improved pest control methods: a case study with chemical mixtures and bivalve biofoulers

Biofouling ◽  
2016 ◽  
Vol 32 (10) ◽  
pp. 1195-1208 ◽  
Author(s):  
Carlos Silva ◽  
Bruno Nunes ◽  
António JA Nogueira ◽  
Fernando Gonçalves ◽  
Joana L. Pereira
Keyword(s):  
Pest Control ◽  
In Vitro Test ◽  
Control Methods ◽  
Chemical Mixtures ◽  
Test Systems ◽  
Vitro Test ◽  
Pest Control Methods

scholarly journals Agricultural pest control programmes, food security and safety

2012 ◽  
Vol 12 (53) ◽  
pp. 6582-6592
Author(s):  
SC Eze ◽  
◽  
BC Echezona
Keyword(s):  
Food Security ◽  
Food Safety ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Pest Control ◽  
Control Methods ◽  
Agricultural Pest ◽  
Potential Health ◽  
Synthetic Pesticides ◽  
Pest Control Methods

Agricultural pest management control strategies are primarily concerned with food security and safety. Popular pest control methods include application of synthetic pesticides, biopesticides (plant extracts), non-chemical pest management and integrated pest management (IPM). The resistance of some of the pests to the chemical pesticides, coupled with potential health hazards on the environment gave birth to a search for botanicals as alternatives to synthetic pesticides. Botanicals as biopesticides were, though effective but their shelf lives and specific actions on the target organisms have not been determined. Non-chemical pest control methods involve common cultural practices which include crop rotation, tillage, and varying time of planting or harvesting, trap cropping which appear to be the best in terms of food safety and quality but the ability of this approach to reduce pest population may be minimal. Because no single pest control method can guarantee food security and safety, integrated pest management (IPM) approach appears to hold promise. The IPM is an ecologically based approach that combines all the available pest control methods to manage pest damage by the most economical means, with the fewest possible hazards to life, property and environment. However, this review shows that the impact of integrated pest management in the rural farm communities is low. In an era of growing consumer awareness and sophistication, food quality is being emphasized. Food safety means that the agro-products should be free from pesticide residues:- therefore, aspects of farm management such as sources of seeds and seedlings, pests and weed elimination, pesticide application dates, dates and amount of fertilization, harvesting or post harvest treatments and basic information regarding the individual farmer or marketing agents activities should be certified before consuming agricultural products. Federal governments especially in developing countries are advised to mount regulating Agencies that will be responsible for a number of activities that contribute to food security and safety, water quality and pesticide applicator training as practiced in the United States of America, India and Indonesia. The agencies will ensure that the public is protected from potential health risks posed by pesticide treated foods.

scholarly journals Can Bacillus thuringiensis affect the biological variables of natural enemies of Lepidoptera?

2018 ◽  
Vol 85 (0) ◽  
Author(s):  
Gabriella Aparecida Salis de Carvalho ◽  
Daniel Júnior Martins ◽  
Isadora Mileny Costa de Brito ◽  
Sebastião Lourenço de Assis Júnior ◽  
Marcus Alvarenga Soares ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Integrated Pest Management ◽  
Pest Management ◽  
Pest Control ◽  
Wheat Bran ◽  
Natural Enemies ◽  
Oviposition Period ◽  
Control Methods ◽  
Biological Variables ◽  
Coleoptera Tenebrionidae

ABSTRACT: The entomopathogen Bacillus thuringiensis (Bt) is widely used as one of the ingredients in pest control formulations, but researches conducted on its effect on non-target organisms are still in the nascent stage. This investigation aimed to uncover if Bt treated with Tenebrio molitor (Coleoptera: Tenebrionidae) larvae and pupae could affect the biological variables of Podisus nigrispinus (Hemiptera: Pentatomidae) and Palmistichus elaeisis (Hymenoptera: Eulophidae), all of which established natural enemies of leaf defoliator caterpillars in the eucalyptus culture. Larvae of T. molitor were fed on wheat bran containing different concentrations of B. thuringiensis (0.00; 0.25; 0.50; 1.00; 2.00 and 4.00 g Agree/kg bran). When the larvae attained size of about 2 cm, they were used as prey for P. nigrispinus (Bioassay I), and their pupae used as hosts for P. elaeisis (Bioassay II). Only the biological variables oviposition period and egg numbers by posture of the predator P. nigrispinus were altered. The biological variables of P. elaeisis were not altered, since it was possible to use these control methods within the integrated pest management.

scholarly journals Disruption of insect immunity using analogs of the pleiotropic insect peptide hormone Neb-colloostatin: a nanotech approach for pest control II

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Patryk Nowicki ◽  
Mariola Kuczer ◽  
Grzegorz Schroeder ◽  
Elżbieta Czarniewska
Keyword(s):  
Pest Control ◽  
Developmental Stages ◽  
Peptide Hormone ◽  
Insect Immunity ◽  
Control Methods ◽  
Tissue Selectivity ◽  
Pass Through ◽  
Pest Control Methods

AbstractThis work continues our studies on the pleiotropic activity of the insect peptide Neb-colloostatin in insects. In vivo immunological bioassays demonstrated that hemocytotoxic analogs of Neb-colloostatin injected into Tenebrio molitor significantly reduced the number of hemocytes in the hemolymph and impaired phagocytosis, nodulation and phenoloxidase activities in the insects. Among the analogs tested, [Ala1]-,[Val1]-, [Hyp4]- and [Ach4]-colloostatin were particularly potent in disrupting cellular immunity in larvae, pupae and adult insects. This result suggests that the most effective analogs showed increases in the bioactivity period in the hemolymph of insects when compared to Neb-colloostatin. Recently, we demonstrated that it is possible to introduce Neb-colloostatin through the cuticle of an insect into the hemolymph when the peptide is coupled with nanodiamonds. In this study, we showed that [Ala1]-, [Val1]-, [Hyp4]- and [Ach4]-colloostatin, when complexed with nanodiamonds, may also pass through the cuticle into the hemolymph and induce long-term impairments of immunity in T. molitor at all developmental stages. Studies on the tissue selectivity and effectiveness of Neb-colloostatin analogs and efficient methods for their introduction into insects may contribute to the development of eco-friendly pest control methods based on bioactive peptidomimetics.

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