Agricultural Entomology - Study Mode
[#146] Ribbon like hind wings are present in
Correct Answer
(A) Nemopteridae
Explanation
Solution: Ribbon-like hind wings are present in Nemopteridae. Nemopteridae, the spoon wings, are a family of neuropteran insects. They are also called thread-winged antlions. The long streamer is conspicuous when the insects are flying and these are the elongated and spatulate hindwings. Adult Nemopteridae, the spoon-winged lacewings and the thread-winged lacewings, have an extraordinary appearance and are easily recognized by their ribbon or thread-like hind wings which are much longer than the fore wings.
[#147] Sugarcane leaf hopper (Pyrilla perpusilla) is controlled by release of lepidopteran parasitoid
Correct Answer
(A) Epiricania melanoleuca
Explanation
Solution: Sugarcane leaf hopper (Pyrilla perpusilla) is controlled by release of lepidopteran parasitoid that is Epiricania melanoleuca. Epiricania melanoleuca is a moth in the family Epipyropidae. It was described by Thomas Bainbrigge Fletcher in 1939. It is found in India, where its larvae are external parasitoids of the sugarcane planthopper (Pyrilla perpusilla). It has been used in biological pest control against this pest.
[#148] The higher LD 50 value indicates the following
Correct Answer
(B) Less toxic
Explanation
Solution: The higher LD 50 value indicates the following is less toxic. The LD 50 gives a measure of the immediate or acute toxicity of a chemical in the strain, sex, and age group of a particular animal species being tested. The larger the LD 50 value, the lower the toxicity and vice versa.
[#149] Mulberry is
Correct Answer
(C) Highly cross pollinated
Explanation
Solution: Mulberry is Highly cross-pollinated. Mulberries are fast-growing when young, and can grow to 24 metres (79 feet) tall. The leaves are alternately arranged, simple, and often lobed and serrated on the margin. Lobes are more common on juvenile shoots than on mature trees. The trees can be monoecious or dioecious. Mulberries are wind pollinated they will still produce fruit even in conditions where local pollinator insects are not present.
[#150] Basic unit of classification is known as
Correct Answer
(C) Species
Explanation
Solution: Basic unit of classification is known as Species. The science of classification is the classification of living and extinct organisms that is biological classification. The basis for the biological classification scheme is similarity of morphology (shape) and phylogeny (evolutionary history). The processes that led to these similarities are also used in biological classification.