19 Questions
What is the primary reason for genetically engineering baculoviruses with genes encoding insect-specific toxins?
To enhance the viruses' insecticidal efficacy
Which type of baculovirus is known to infect over 500 species of insects and is most commonly found in Lepidoptera?
Nucleopolyhedroviruses (NPV)
What are the infectious virus particles of NPVs called when they are occluded in protein bodies?
Polyhedra
How do insect larvae infected with NPV usually die?
After 5 to 12 days from infection, depending on various factors
Where in the insect does reproduction of NPV primarily take place after ingestion by the host?
Primarily in the fat body, epidermis, and blood cells
What happens to infected insect larvae just before dying from an NPV infection?
They crawl to elevated structures where they die and decompose
What is the general reproductive mode of nematodes?
Amphimictic
Which term describes the condition where males and females of nematodes are present separately?
Dioecious
What is the term for the type of parasitism where the parasite may kill the host?
Obligate parasitism
Which system is absent in nematodes among the following?
Respiratory system
What is the primary method of reproduction in nematodes where males are not required?
Parthenogenesis
Which feature makes Mermithids particularly attractive for biocontrol?
Inundative release potential
What is a common characteristic of aquatic Mermithids regarding infection process?
Entry into the hemocoel leading to early emergence
Which of these is an example of a terrestrial Mermithid?
Romanomermis culicivorax
What is a characteristic of Rhabditidae nematodes in terms of host range?
Wide host range
Which statement accurately describes Steinernematidae nematodes?
Host entry followed by release of Photorhabdus bacteria
What host range is most susceptible to Steinernema carpocapsae?
Lepidopterous larvae
Which species is known for affecting immature Dipterans and being effective at low temperatures?
Stienernema feltiaz
What is a common form of host resistance mentioned in the text?
Melanization
Learn about the characteristics of Order Mermithidae, an obligate parasite with host specificity mostly towards spiders, crustaceans, and cutworms. Discover its entomopathogenic nature and morphological features such as flat cephalic papillae and absence of the anus in females.
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