Field Assessment of the Effects of a Microbial Pest Control Agent on Nontarget Lepidoptera

1990 ◽  
Vol 36 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Jeffrey C. Miller
Keyword(s):  
Pest Control ◽  
Control Agent ◽  
Field Assessment

scholarly journals Cuticle degrading enzyme production by some isolates of the entomopathogenic fungus, Metarhizium anisopliae (Metsch.)

2014 ◽  
Vol 20 ◽  
pp. 25-32
Author(s):  
N Sapna Bai ◽  
OK Remadevi ◽  
TO Sasidharan ◽  
M Balachander ◽  
Priyadarsanan Dharmarajan
Keyword(s):  
Pest Control ◽  
Entomopathogenic Fungi ◽  
Enzyme Production ◽  
Insect Pest ◽  
Strong Relationship ◽  
Control Agent ◽  
Mechanical Pressure ◽  
Degrading Enzyme ◽  
Insect Pest Control ◽  
Degrading Enzymes

Context: Entomopathogenic fungi have been recognized as viable alternate options to chemicals in insect pest control. Unlike other potential biocontrol agents, fungi do not have to be ingested to infect their hosts but invade directly through the cuticle. Entry into the host involves both enzymic degradation of the cuticle barrier and mechanical pressure. Production of a range of cuticle degrading enzymes is an important event in the interaction of entomopathogenic fungi and host. Enzyme secretion is believed to be a key contributor for the virulence of a fungal isolate. Objectives: The potentiality of nine isolates of M. anisopliae were tested to produce to produce three important cuticle degrading enzymes, viz., chitinase, protease and lipase. Materials and Methods: Nine isolates of M. anisopliae were evaluated for chitinase, protease and lipase enzyme production by determining the enzyme index and activities. Results: Chitinase index of these isolates were ranged from 1.5 to 2.2 and chitinolytic activity from 0.525 to 1.560 U/ml. The isolates showed protease index in the range of 1.2 to 3.3 and the activity ranged from 0.020 to 0.114 U/ml. Lipase index ranged from 1.15 to 7.0 and the enzyme activity ranged from 0.153 to 0.500 U/ml. A strong relationship was observed between virulence of the isolates and cuticle degrading enzyme production as increased enzyme production was observed for virulent isolates. Conclusion: In the present study three isolates as (MIS2, MIS7 and MIS13) demonstrated cuticle degrading enzyme (CDE) that indicate higher virulence based on the bioassay conducted earlier by the authors as strongly substantiating the role of CDEs is considered the virulence of Metarhizium isolates. So, these isolates may be as ecofriendly insect-pest control agent in future. DOI: http://dx.doi.org/10.3329/jbs.v20i0.17648 J. bio-sci. 20: 25-32, 2012

Evaluation of a contraction flow field on hydrodynamic damage to entomopathogenic nematodes?A biological pest control agent

2004 ◽  
Vol 86 (1) ◽  
pp. 96-107 ◽  
Author(s):  
Jane P. Fife ◽  
Richard C. Derksen ◽  
H. Erdal Ozkan ◽  
Parwinder S. Grewal ◽  
Jeffrey J. Chalmers ◽  
...  
Keyword(s):  
Flow Field ◽  
Pest Control ◽  
Entomopathogenic Nematodes ◽  
Control Agent ◽  
Contraction Flow ◽  
Biological Pest Control

VIABILITY OF A BIOLOGICAL PEST CONTROL AGENT THROUGH HYDRAULIC NOZZLES

2005 ◽  
Vol 48 (1) ◽  
pp. 45-54 ◽  
Author(s):  
J. P. Fife ◽  
H. E. Ozkan ◽  
R. C. Derksen ◽  
P. S. Grewal ◽  
C. R. Krause
Keyword(s):  
Pest Control ◽  
Control Agent ◽  
Biological Pest Control

Using CFD Methods to Predict Damage of a Biological Pest Control Agent during Passage through a Hydraulic Nozzle

2003 ◽  
Author(s):  
Jane Patterson Fife ◽  
Richard C. Derksen ◽  
H. Erdal Ozkan ◽  
Parwinder S. Grewal
Keyword(s):  
Pest Control ◽  
Control Agent ◽  
Biological Pest Control

scholarly journals Pathogenicity of Beauveria bassiana Vuill in compost media for Oryctes rhinoceros L. oil palm pest control

2021 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Rina Novianti ◽  
Hafiz Fauzana ◽  
Rusli Rustam
Keyword(s):  
Biological Control ◽  
Beauveria Bassiana ◽  
Pest Control ◽  
Oil Palm ◽  
Biological Control Agent ◽  
Early Death ◽  
Breeding Site ◽  
Control Agent ◽  
Oryctes Rhinoceros ◽  
Plant Pest

The Oryctes rhinoceros pest is an important pest of palm oil plant.  Pest problems occur because  Oil Palm Empty Fruit Bunches (OPEFB) is added for soil fertility to create a breeding site for larvae O. rhinoceros. Generally, OPEFB will receive the plants more quickly when composted, and pest control is carried out in the compost. Biological control is more recommended because it is environmentally friendly, Therefore compost is added with biological control agent O. rhinoceros namely B. bassiana. This study is aimed to obtain the best conidia density of Beauveria bassiana in compost in controlling larvae O. rhinoceros. The research was carried out at the Plant Pest Laboratory and Experimental Garden, Faculty of Agriculture, Riau of University. The study was carried out from February to November 2020. The experiment on the conidia density of B. bassiana fungi in compost media against larvae O. rhinoceros, using a Completely Randomized Design (CRD), with 6 treatments 4 replications obtained 24 experimental units, while the treatments were 0 g.l-1, 15 g.l-1, 30 g.l-1, 45 g.l-1, 60 g.l-1 and 75 g.l-1. The results of the research revealed that  OPEFB compost + sawdust containing the fungus B. bassiana 75 g.l-1 (83,2 x108 kon/ml) had the best ability to control larvae O. rhinoceros with a total larvae mortality of 87% which caused early death of 54 hours after application, LT50 of 213 hours after application, and LC50 of 3,3% or the equivalent of 33 g.l-1 at 14 days after application.

scholarly journals How effective are frogs in regulating crop pest population in a natural multi-trophic system??

2021 ◽  
Author(s):  
Deyatima Ghosh ◽  
Sabyasachi Chatterjee ◽  
Parthiba Basu
Keyword(s):  
Pest Control ◽  
Agricultural Landscape ◽  
Negative Impact ◽  
Growth Models ◽  
Habitat Diversity ◽  
Control Agent ◽  
Crop Pest ◽  
Agricultural Intensity ◽  
Predator Abundance ◽  
Natural Pest Control

Potential of frogs as important natural pest control agents has been highlighted earlier. But the effectiveness of frogs in regulating the pest load in intensive agricultural landscape in a multi-trophic system is not clear. We performed controlled field experiment in paddy field with a varying density (observed in high and low agricultural intensity (AI) areas) of a commonly found frog species and compared the pest and pest predator build-up. The consumption rate of the model amphibian was studied using enclosure experiment. The consequent trophic cascade effect of frogs on both crop pest and other arthropod pest predator was analyzed using mathematical population growth models. Although frogs consumed pests, they could not reduce crop pest abundance. Although a lesser frog density found in high AI areas significantly affected the pest predator abundance. Based on the functional response result, mathematical growth models demonstrated that with a constant harvesting factor (Holling Type II) frogs will always have a negative impact on the beneficial natural enemy population due to intraguild predation thereby limiting its potential as a pest regulator. Our study challenges the notion of frogs as an effective pest control agent and argues that increasing habitat diversity might improve overall biological pest suppression.

scholarly journals Pest control using virus as control agent: A mathematical model

2012 ◽  
Vol 17 (1) ◽  
pp. 67-90 ◽  
Author(s):  
Sweta Pathak ◽  
Alakes Maiti
Keyword(s):  
Mathematical Model ◽  
Time Delay ◽  
Numerical Simulations ◽  
Pest Control ◽  
Control Agent ◽  
Regulatory Impact

It is now well recognised that biocontrol of pests is one of the best ecofriendly alternative for pest control. In this paper we have studied dynamical behaviours of a model for biocontrol of pests, where it is assumed that the pest is affected by a virus. Boundedness and stability of the model are studied. The effect of time-delay is investigated. Numerical simulations are carried out to illustrate our analytical findings. It is observed that the time-delay has a regulatory impact on the system. Biological implications of our results are discussed.

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