Questions related to Biological Control
Adding living organisms to the soil for the purpose of biological control, does it change the balance of organisms in the soil?
Biological control is an alternative to chemical pesticides as they are safe for humans and their environment
But in the long run, the organisms in the soil lose the natural balance due to the predominance of one organism over another
Several research demonstrate the efficiency of using biopesticides made from plant extracts in a variety of forms against a widerange of diseases and pests in lab settings. Some studies even demonstrate the usefulness on land. The issue arises if this extraction uses a lot of plant material, which is highly expensive. Wild plants that grow in difficult conditions typically exhibit significant insecticidal, fungicidal, etc. properties. If the usage of these plants is promoted, it appears that this will affect the ecosystem's balances.
I am involved in a project on biological control of the Comstock mealybug Pseudococcus comstocki in Switzerland. As part of this project, we are doing host specificity tests of a parasitoid and, besides P. comstocki, have tested so far the following non-target species: Pseudococcus longispinus, Planococcus citri and Phenacoccus aceris. We would like to test more species of the family Pseudococcidae and are looking for someone in Europe who could give us an identified starting colony for this purpose.
Thank you for your help!
Okra seedlings were raised.
Pathogen inoculation was done during sowing.
This was followed by biological control.
Dickson quality index (DQI) = total dry mass / (Shoot:Root ratio + SQ)
Where, Sturdiness quotient (sq) = plant height / root collar diameter
How effective is it to calculate DQI when pathogen inoculation was done while seed-sowing, followed by biological control (Trichoderma/ Pseudomonas/ Botanicals application)?
What are some of the best alternative biological control and or botanical insecticides used to control pest infestation of cocoa pod borer on the cocoa (Theobroma cacao) bean?
Dear Dr. Cai,
my name is Simone Prospero and I work in the team of Phytopathology at the Swiss Federal Institute for Forest Snow and Landscape Research (WSL; https://www.wsl.ch/en/about-wsl/research-units/forest-health-and-biotic-interactions/phytopathology.html).
I am currently leading a project in which we aim at looking for viruses in the fungus Hymenoscyphus fraxineus, the causal agent of ash dieback in Europe. The idea behind this is to test if such viruses (if present) could be used for the biological control of the pathogen (as in the chestnut blight fungus Cryphonectria parasitica). For this study, we screen native populations of H. fraxineus in which chances to find viruses are highest. We currently have three populations from Japan, but it would be great if we could test additional populations from the native range of the species, in particular China, Korea and East Russia.
Would you have Asian isolates of H. fraxineus to share with us or do you know somebody else who may have such isolates?
Sorry for bothering you with this and many thanks in advance for your help!
entomologists have concluded that introduced biocontrol agents are most effective when they exhibit the following characteristics:
1-Narrow host range.
Generalized predators may be good natural enemies but they don't kill enough pests when other types of prey are also available.
Natural enemies must be able to survive the extremes of temperature and humidity that they will encounter in the new habitat.
3-Synchrony with host (prey) life cycle.
The predator or parasite should be present when the pest first emerges or appears.
High reproductive potential. Good biocontrol agents produce large numbers of offspring. Ideally, a parasite completes more than one generation during each generation of the pest.
4-Efficient search ability.
In order to survive, effective natural enemies must be able to locate their host or prey even when it is scarce. In general, better search ability results in lower pest population densities.
5-Short handling time.
Natural enemies that consume prey rapidly or lay eggs quickly have more time to locate and attack other members of the pest population. Small populations of efficient natural enemies may be more effective biocontrol agents than larger populations of less efficient species.
6-Survival at low host (prey) density.
If a natural enemy is too efficient, it may eliminate its own food supply and then starve to death. The most effective biocontrol agents reduce a pest population below its economic threshold and then maintain it at this lower equilibrium level.
which of them are the most important?
I am looking for biological control research groups all over the world. I would like to have some input about which are the best in this field and where are they located. Any input will be appreciated.
Invasive species are an increasingly significant threat to our environment, economy, health and well‐being. Most are nonindigenous (evolved elsewhere and accidentally introduced) and have been removed from the constraints regulating growth in their native habitat. The best method of control is to prevent establishment in the first place or to quickly identify establishment and adopt an eradication programme. However, if an invasive species becomes established many of the options for removal can cause environmental damage, for example chemical control or mechanical excavation. Biological control (introduction of a natural predator/pathogen) can work well as long as the control organism targets only the invasive species. Otherwise there is a risk that the control organism might also become an invasive species. Alternatives, such as manipulating existing natural enemies and/or the environment to enhance biological control, are also being developed. Sustainable solutions are required if we are to deal with the continually growing problem of invasive species.
I have been isolated the fungi that associated with animal dung such as cow , sheep and poultry dung and I want to know if there any fungus which used in biological control.
Many experiments started with local plant competition induced to control/remove spots of Japanese Knotweed (Reynoutria japonica, or Fallopia japonica). However I did not find conclusions/publications/reports.
Do you know any cryptic stories or reports with conclusion?
We would try a competition with local Salix spp. in France and avoid repetitive mistakes.
Which is better, isolate the fungi from the plant or from the soil and use them in biological control?
The goal of my project is to develop a biological control method for Dendrolimus pini with Trichogramma spec. So far, I have tried Trichogramma brassicae but it did not work. I would like to try Trichogramma dendrolimi instead but I don't know where to get them. If you are working with them or know someone who does please let me know.
Many thanks in advance,
The plant came to India along with supplied wheat from USA.
Now it is widespread in each and every corner of India and some other countries.
The plant is having some dangerous health impacts.
Are there any biological control measure?
Can it be used as fodder, silage or any other means?
Now we have serious problems with whitefly in tomato at the greenhouse. Always we use Encarsia system from Biobest (Encarsia formosa, parasitic wasps) for control of these pests. Unfortunately, now our problems is increased due to damaging of sensor control system in block. Can you advise me another, more effective biological method against the whitefly in tomato?
Sincerely, Mehdi Ali.
I want to know how to apply calcium alginate capsules containing immobilized biological control cells for treating postharvest pathogens on fruits.
i work on Baeuvaria bassiana as endophytic fungus, and trying to colonized it in plant tissues by (spying - injection - roots Soaking)
Eradication methods need to be more fully explored. Can we here on Guam plead with the international community for assistance or offer more incentive to employ the assistance of the fully capable and knowledgeable researchers around the world to provide their professional expertise or are just going to not have any more coconut trees? Any grant resources to share? The bucket trap with beetle pheromone could be analyzed for a better design/efficiency. Where does the beetle pheromone come from? What is it's make-up/composition? Is the hormone structure for the know population isolated and characterized already/ known and readily harvested or extracted or even possibly synthesized locally? Can we play with the ratio of racemic mixing and test for an improved catch rate? Do we have ecologically relevant data/ behavioral observation of the local population to aid in our eradication design? What compound mixture is specifically currently being used and what are the challenges to its cost, transfer and storage, decomposition rate and is the attractant selected specifically to the Guam rhino beetle population? (Or is it old and nonspecific?) Regarding biological control using Oryctes nudivirus (OrNV), the preferred biocontrol agent for CRB, and Metarhizium majus is way not fully developed and another virus could theoretically be found or even designed. Is that not still an option to explore even if it failed before? FYI, CRB-Guam is a new biotype and resistant to all biological methods deployed so far... or is it just too dangerous... potentially presumably species-specific biocontrol that can possibly kill non target species? What about the cattle dung approach? What will they go for after all the coconut trees are gone? The breadfruit? why are some local palms seemingly not affected?
Growth and Productivity of some Vegetable Crops as Affected by Chemical and Biological Control of White-rot Disease.
i have been using some endophytic bacteria in my research and i want to know their ability to fix atmospheric nitrogen on "nitrogen free medium" i don't know about the evaluation of positive and negative strains.need suggestion from the literature or experience.
Dear Dr. Kulkarni,
At first, I would like to introduce myself. I am Subha Das, presently based in Okayama University (IPSR), Japan, working as a JSPS postdoctoral fellow since May 2018. I mainly work on lifestyle of mycoviruses and I am also interested in mycovirus-based biological control research. After I go back to India in 2020, I would like to start my own mycovirus research there.
I am interested in mango diseases caused by fungi, and therefore would like to know which diseases are most economically important there. Like powdery mildew, anthracnose, die back, blight, red rust, sooty mould, etc. My main aim is to target the major fungal pathogen of mango.
I know many researchers who work on rice diseases in India but I have no idea about mango pathologists. In the circumstances, it would be really nice if you could introduce me to some pathologists who are working on fungal diseases of mango. I am also looking for a good collaboration for future.
Thank you for your time and consideration. I look forward to hearing from you.
Intéressés par les recherches fondamentales ou appliquées sur les organismes entomophages (arthropodes prédateurs, insectes parasitoïdes, nématodes entomopathogènes, etc) ?
Participez au prochain de Colloque des Entomophagistes (25-29 mai – Antibes-Juan les Pins, France) !
i have been looking for some events occurring when bio-control bacteria come in contact with fungal pathogen. there can be many thing involve during this kind of antagonism e.g VOCs or antibiotics produced by the bacteria but i am looking specifically for the role of antibiotics like surfactin, bacillomycin, fengycin etc. how can i prove that the antagonism in dual culture was because of the production of these products. kindly suggest me to prove the role of antibiotics during fungal and bacterial antagonism in dual culture.
I am trying to use Isaria fumosorosea as a biological control for Aphis gossypii in a greenhouse for organic cucumbers. When I mix the spores with water to spray on the plant, most of the spores are on the bottle wall. What would be the best solution to apply the spores by spraying?
Actually pink bollworm is major pest of cotton in Pakistan ans as well in China. Some issues regarding Bt resistance varities in Lepidopteran pests are main concerns now a days. My question is that which specie or strain ( Resistant or susceptible) i should use if i control this pest by biological control using different predators for further studies.
I need kind suggestions from all of you.
Thank you advancely for your kind concern about that.
I´m making my Master Thesis in Applied Microbiology and the aim of my work focuses on using nematophagous fungi to control infections by helminths and Eimeria spp. in Chickens.
I´m searching for articles specific for biological control in birds.
(Bsc) Animal Production Engineering
Master student of Applied Microbiology
I need some help to find out specified periodicals or notes journals to publish an essay or scientific note.
i wanted to analyse the effect of biocontrol bacteria on fungal hypea during antagonism by using Scanning electron microscope (SEM) but i am facing a problem of collecting the fungal hyphea form solidified agar plate in which the experiment is being conducted. can anybody suggest me a way to collect these affected hypea from the PDA plate ?
I want to evaluate some fungicides on some fungus as well as some fungus and bacteria used to biological control of this fungus. How can I evaluate the selectivity of these pesticides?
I need to request the Trichogramma wasps for biological control of various pests in apple trees — for example, codling moth.
Could you be so kind to inform me about the species of Trichogramma for struggle against the pest of apple trees?
Hello every body
I found Trichoderma orientale together with T. harzianum and T. longibrachiatum in agriculture soils. I am appreciated very much if kindly let me know about any references refer to the role of T. orientale in biological control
Sir i need some literature regarding the development of a biopreparation for the biological control of plant diseases.
What are the important steps to be followed in order to develop a biopreparation. Thank you.
I have collected adult specimens of green lacewing (Chrysopidae). With the help of local taxonomists (not experts on Neuroptera), identified upto genus level (Chrysoperla genus), but not sure about the species. I need to conduct different research activities related to biological control on this predator; but need to confirm the species. Need help in this regard, thanks
Dose anybody know about effective control of Cydalima_Perspectalis in forest(except BT)?such as botanical pesticide (neem oil) and another question is:what is the method of insecticide bioassay in forest
I have a closed loop biological control system where i use a PID controller. Because the transfer function of the biological system is complex to derive, I used trial and error to tune the PID parameters. And the resulting response is nearly critical damped. What can I learn from the parameters value of PID values that I found?
Please attach any tech notes or papers. Thanks in advance.
I know that a variety of biological control agents have been tried in Australia. Are they working, on both new and established infestations? Have they made M. pigra less invasive? And, have any of them been used outside Australia?
PLOS ONE is currently searching for an editor for a review of our paper entitled "The Dissemination of Imidacloprid from Granular Bait in Dairy Manure, a Breeding Substrate of Filth Flies and their Natural Enemies." This paper analyzed imidacloprid residues present in diary cow manure by HPLC and mass spec. The topics in the paper have implications about the environmental fate of imidacloprid, a widely used insecticide, and potential ramifications it might have on natural enemies of filth flies in dairy manure. If you are interested, please contact me by sending a message here on Researchgate. Thanks.
I am working on Arthropods which are potent bio-control agents of insect pests in agro-ecosystems. I have 4 such Arthropods which are from different genera and having potential to control insect pests. I want to compare those predators. Is it feasible to go for RAPD marker?
In literature, pesticide, biopesticide and biocide these terms are most commonly used in crop protection where-
* Biocide has been represented both synthetic and natural products those are able to kill or control living beings and it seems that all pesticide and biopesticide (active ingredients) could be represented as biocide
* In terms of pesticide, the synthetic product used to control pest, and lastly
* Biopesticide is natural product able to control pest
Therefore, I need opinion regarding these terms and their use in manuscript or journal article.
Tomato plants used in whitefly (Bemisia tabaci) rearing got infested by the two-spotted mite. If I release predatory mite (Phytoseiulus persimilis) then will they cause any problem to whiteflies?
Pheromone traps are widely available, easy in use and also they are eco-friendly measures .Secific traps are used for specific insect and pest .How the traps can be used in effective way for controlling insect and pest population?
We are working on the morphological and molecular characterization of potential clones grapevine variety Vranac, the dominant black wine variety from Montenegro.
We analyzed 98 potential clones-vines based on qualitative and quantitative characteristics. During the two-year period, the analysis was conducted and 21 potential clones were identified. We tested the ELISA test using the BIOREBA AG reagent (http://www.bioreba.ch) for the presence of GLRaV-1, GLRaV-3, and GFLV, in the absorption readings at 405 nm. In all samples, presence was established.
We are interested in how to proceed. What methods can be applied to selected potential clones to remove these viruses?
We're getting ready beforehand.
Prof. Dr Branislava Sivčev
University of Belgrade
Faculty of Agriculture
Institute of Horticulture
Chair of Viticulture
As you may know, cultivation of transgenic plants is prohibited in some countries. In other hand, the major plants in brassicaceae family have erucic acid in their seed oil. Then how we can produce a brassicaceae plant with 00 or 000 erucic acid without genetic engineering technology?
Canola (the erucic acid - free rapeseed) is cultivated in over the world. Are this plans NON_GM? If yes, hoe they have been produced?
There is a need to identify a group of arthropods from which effort should be put while scouting for candidate biocontrol agents of a given forest insect pest.
Olive (Olea europaea L.) is one of the most important crops in the Mediterranean countries. Olive leaves, available throughout the year, are one of the byproducts of olive farming; they accumulate during the pruning of the olive trees and can be found in large amounts in olive oil industries after being separated from fruits before processing (about 10% of the weight of olives). Several reports have shown that olive leaves have antioxidant activity and anti-fungal properties, So, can be used dry leaves powder as protectants against phytopathogenic.
As I was on my field visit I found people used "Rogor" which is toxic to human health. Can seed extract of custard apple be more effective to kill aphids but less toxic to human health?
As part of my fungal entomopathogens based bioinsecticide development I got several Isaria fungi. Now its time to do insect bioassay with those isolates. I have gotten several journals and suggestions which provides a lot of succeptible organisms include weevils, ground beetles, plant beetles, aphids, whiteflies, psyllids, wasps, termites, thrips, and a wide variety of butterflies and moths. So Can you guys suggest me which insects I may select to start bioassay?
I obtained three parasitoids from the same batch of eggs from a Reduviidae bug from Colombia possibly from the Platygastridae family. There are few published records of parasitoids in Reduviidae eggs. I would like to know if anyone knows what genus and species are? The yellow individual may be an hyperparasitoid. If you have published records please let me know.
I also looked for studies on the effects of Bt maize on non-target organisms and most of them say that Bt maize had no apparent effect on these non-target organisms (such as honey bees, some butterfly species, etc.). What other negative effects could Bt maize lead to aside from resistance of target organisms?
I am looking for those with toxic effects on caterpillars
How can I mass rear Tetranychus urtica on an artificial diet without using plants?
I want to mass rear Tetranychus urtica in laboratory on an artificial diet without using plants. Has anyone known any method to formulate a diet that could be used?
procedures on how to identify the Bt in a culture media
procedures on how to isolate the gene responsible for insecticidal property of Bt (B. thuringiensis)
Other than insecticide-producing, more specifically other than Bt(Bacillus thuringiensis). What would be the best transgenic plants in terms of being environmentally friendly, as well as from an economic standpoint?
I observed one pupa of genus Striglina（Lepidoptera：Thyrididae）, found 8 cremasters at the pupa‘s end. But I don’t know if other species of this genus are all the same, who has researched them? Can you give me some lectures, especially in 3 tea plant pests, Striglia suzukii, Striglina glareola and Striglina scitaria, in China.