scholarly journals Nosema (Microsporida: Nosematidae) Species as Potential Biological Control Agents of Cactoblastis cactorum (Lepidoptera: Pyralidae): Surveys for the Microsporidia in Argentina and South Africa

2001 ◽  
Vol 84 (4) ◽  
pp. 527 ◽  
Author(s):  
Robert W. Pemberton ◽  
Hugo A. Cordo
Keyword(s):  
South Africa ◽  
Biological Control ◽  
Biological Control Agents ◽  
Cactoblastis Cactorum ◽  
Lepidoptera Pyralidae

scholarly journals First Screening of Entomopathogenic Nematodes and Fungus as Biocontrol Agents against an Emerging Pest of Sugarcane, Cacosceles newmannii (Coleoptera: Cerambycidae)

Insects ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 117 ◽  
Author(s):  
Marion Javal ◽  
John S. Terblanche ◽  
Desmond E. Conlong ◽  
Antoinette P. Malan
Keyword(s):  
South Africa ◽  
Biological Control ◽  
Chemical Control ◽  
Entomopathogenic Nematodes ◽  
Biocontrol Agents ◽  
Sugar Production ◽  
Biological Control Agents ◽  
Sugarcane Stalk ◽  
Reduce Sugar ◽  
Steinernema Yirgalemense

Cacosceles newmannii (Coleoptera: Cerambycidae) is an emerging pest of sugarcane in South Africa. The larvae of this cerambycid beetle live within the sugarcane stalk and drill galleries that considerably reduce sugar production. To provide an alternative to chemical control, entomopathogenic nematodes and fungus were investigated as potential biological control agents to be used in an integrated pest management system. The nematodes Steinernema yirgalemense, S. jeffreyense, Heterorhabditis indica, and different concentrations of the fungus Metarhizium pinghaense were screened for efficacy (i.e., mortality rate) against larvae of C. newmannii. The different biocontrol agents used, revealed a low level of pathogenicity to C. newmannii larvae, when compared to control treatments.

Seasonal abundance and parasitism of Mesoclanis seed flies (Diptera: Tephritidae) in South Africa, and implications for the biological control of Chrysanthemoides monilifera (Asteraceae) in Australia

1998 ◽  
Vol 88 (4) ◽  
pp. 407-414 ◽  
Author(s):  
P.B. Edwards
Keyword(s):  
South Africa ◽  
Biological Control ◽  
Nature Reserve ◽  
Seasonal Abundance ◽  
Western Cape ◽  
Flowering Period ◽  
Eastern Cape ◽  
Biological Control Agents ◽  
Kwazulu Natal

AbstractThe seasonal abundance and rates of parasitism of three species of Mesoclanis seed flies was studied in South Africa. The three species occur on Chrysanthemoides monilifera, and were recorded during most months of the year, whenever C. monilifera was flowering. At three sites in KwaZulu-Natal, numbers of eggs per capitulum of Mesoclanis polana Munro were highest on C. monilifera rotundata between June and November (winter/spring), towards the end of the main flowering flush. Parasitism of M. polana was between 50% and 90% for most of the year. Two other species of Mesoclanis (M. magnipalpis Bezzi and M. dubia Walker) occurred together on C. m. rotundata in the Eastern Cape (St Francis Bay), where parasitism during the year was between 55% and 95%. Peak numbers of eggs per capitulum (M. magnipalpis and M. dubia combined) occurred in May/June (winter), in the latter part of the main flowering flush. Mesoclanis magnipalpis was the only species recorded on C. m. pisifera in De Hoop Nature Reserve (Western Cape), where there was only one peak of oviposition (May/June), coinciding with the short and discrete flowering period of this subspecies. Parasitism was between 50% and 65%. At least nine species of parasitoid were reared from immature Mesoclanis stages. Eurytoma sp. (Eurytomidae) was a dominant parasitoid at all sites. Results are discussed in relation to the possible effectiveness of species of Mesoclanis seed flies as biological control agents of C. monilifera in Australia.

Acigona infusella (Walker) (Lepidoptera: Pyralidae), an agent for biological control of waterhyacinth (Eichhornia crassipes) in Australia

1983 ◽  
Vol 73 (4) ◽  
pp. 625-632 ◽  
Author(s):  
D. P. A. Sands ◽  
R. C. Kassulke
Keyword(s):  
Biological Control ◽  
Host Specificity ◽  
Eichhornia Crassipes ◽  
Larval Mortality ◽  
Egg Mass ◽  
South American ◽  
Biological Control Agents ◽  
Pontederia Cordata ◽  
Mass Size ◽  
Lepidoptera Pyralidae

AbstractThe biology and host specificity of a South American moth, Acigona infusella (Wlk.), were studied in quarantine facilities in Australia. In choice tests on the host specificity of A. infusella, slight feeding by larvae occured on ginger, lettuce, banana, bullrush (Typha orientalis) and water primrose (Ludwigia peploides), but in starvation tests only waterhyacinth (Eichhornia crassipes) and pickerel weed (Pontederia cordata) supported complete development. A decrease in larval mortality and increase in egg-mass size of A. infusella occured when a microsporidian, Vairimorpha sp.; infecting the colony was eliminated, suggesting that these insects may then perform more effectively as biological control agents in Australia than in South America. The damage to waterhyacinth cause bu larvae of A. infusella may complement attack by other biological control agents already established in Australia.

scholarly journals Insect Herbivores Associated with Nymphaea mexicana (Nymphaeaceae) in Southern United States: Potential Biological Control Agents for South Africa

2020 ◽  
Vol 103 (1) ◽  
pp. 54
Author(s):  
Megan K. Reid ◽  
Julie A. Coetzee ◽  
Martin P. Hill ◽  
Rodrigo Diaz ◽  
Lyn A. Gettys ◽  
...  
Keyword(s):  
United States ◽  
South Africa ◽  
Biological Control ◽  
Southern United States ◽  
Insect Herbivores ◽  
Biological Control Agents
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