Question

Scirpophaga incertulas is an example of
A. Monophagous pest
B. Diphagus pest
C. Oligophagous pest
D. Polyphagous pest

Answer 1

Hint: Scirpophaga incertulas involve those insects which are known to feed on only a single species of plants, animals, or any pathogenic species.

Complete answer:
Scirpophaga incertulas are yellow stem borer species of moth family in the description by wingspan the adult males are smaller than the female’s male are brownish with dark scales and the female fuscous brown with the pale fuscous hind wing. It is considered a major rice pest and is harvested annually.
In option B: Diphagus pest this is not an example of scirpophaga incertulas so this is not correct.
In option C: Oligophagous refers to the eating of only a few specific foods an organism may exhibit narrow where the diet is restricted to a very few foods and their feeding activity to plants belonging to one taxonomic group example are cabbage butterflies. so this option is not correct.
In option D: Polyphagous pests are primary agricultural pests that feed on an economical variety of agriculture and horticulture cultivated crop plants. They cause immense damage across the different plants. Locusta migratoria re example of polyphagous pest so this option is not correct.

Hence, the correct answer is option (A).

Additional information:
In biological control of Monophagous pest most occur at a low level. it is a serious rice pest damaged plant into dead tassel or white tassel such type of damage in rice plant it’s very important to analyse the study of the regulation of population dynamics and related factors affecting.

Note: Control is very important for the pest because due to heavy damage of rice many controlling measures are used. Numerous pest residence paddy varieties are genetically modified. Split release of Trichogramma japonicum improved to control the pest.