Biological Control Biological control is the use of parasites, predators or pathogens...
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Transcript of Biological Control Biological control is the use of parasites, predators or pathogens...
![Page 1: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/1.jpg)
Biological Control
Biological control is the use of parasites, predators or pathogens (disease-causing
organisms) to help control pests ranging from nematodes to weeds to vertebrates.
![Page 2: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/2.jpg)
Successful Examples
1930s - control of prickly pear (Opuntia spp.) by Cactoblastis cactorum.
![Page 3: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/3.jpg)
Cactoblastis cactorum grubs eating prickly pear
![Page 4: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/4.jpg)
Other examples
1970s - control of narrow leaf form of skeleton weed using a rust fungus. 1970s and early 1980s - control of spotted alfalfa aphid in lucerne by parasitic wasps/ 1960s to 1980s - dung beetles to bury dung. Stopped pest flies breeding and pasture fouling.
![Page 5: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/5.jpg)
Fresh Cow Dung
![Page 6: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/6.jpg)
Bush Flies develop as maggots in the animal dung. Adults have two stripes on their back. The Common House Fly Musca domestica is also in this family.
![Page 7: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/7.jpg)
Fly maggots
![Page 8: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/8.jpg)
Dung Beetle At Work
![Page 9: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/9.jpg)
Life Cycle of Dung Beetle
![Page 10: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/10.jpg)
Biological Control
• Introduced organism must be tested and found to be safe before it is released.
• Introduced organism often comes from the same country as the pest organism.
• The introduction of the cane toad is an example of biological control that turned out disastrous.
• Cane toads were introduced from South America to control cane beetles in Queensland.
• Cane toad is now a major pest organism
![Page 11: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/11.jpg)
![Page 12: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/12.jpg)
![Page 13: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/13.jpg)
Predicted spread of cane toads
![Page 14: Biological Control Biological control is the use of parasites, predators or pathogens (disease-causing organisms) to help control pests ranging from nematodes.](https://reader036.fdocuments.us/reader036/viewer/2022062423/56649ef35503460f94c05b80/html5/thumbnails/14.jpg)
These animals die when they eat cane toads