Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

The scientific name of paddy leaf hopper is Nephoettix sp.
Nephotettix is a genus of planthoppers in the subfamily Deltocephalinae and tribe Chiasmini. Species are mostly found in Asia, although two are from Africa.
It is known as 'green leafhoppers' of paddy/rice, Nephotettix cincticeps and N. virescens appear to be the most important Asian pest species in this genus: as vectors of viruses, such as tungro disease in rice.

Dermaptera insect order is known as 'Euplexoptera'.
Euplexoptera is the taxonomic order containing earwings which is now known as Dermaptera. Earwigs make up the insect order Dermaptera. With about 2,000 species.
In 12 families, they are one of the smaller insect orders. Earwigs have characteristic cerci, a pair of forcep-like pincers on their abdomen, and membranous wings folded underneath short, rarely used forewings, hence the scientific order name, "skin wings".

Pink boll worm is most harmful pest (Insect) for cotton.
Pink bollworm is one of the most destructive pests of cotton in the Punjab, Haryana and Pakistan. The damage is caused by the caterpillars only.
They are pink and are found inside flower buds, panicles and the bolls of cotton or the fruits of okra and other allied plants.

Teepol is used as a sticker along with insecticide for better spread.
Among the plant derivatives, neem oil 0.5 to 3% and neem seed kernel extract 5% with teepol 0.05% are quite effective against major pest of fruits crops, vegetables.
Mix 30 ml of neem oil with 5 ml of sticking agent teepol until white emulsion is formed. Then add one litre of water and mix thoroughly for use of spray fluid.

Chromosomal pattern for female silk worms is ZW.
In silkworms, the female is the heterogametic sex and has one Z and one W chromosome, whereas the male has two Z chromosomes.
In this system the genetic sex of an offspring is determined by a pair of sex chromosomes, always a Z from the father, and either a Z or W from the mother. The ZW system is opposite of the XY system in that the mother's sex chromosome determines the genetic sex of the offspring.

Boron element is not phytotoxic.
Phytotoxins are substances that are poisonous or toxic to the growth of plants.
Boron element is not phytotoxic, it plays a key role in a diverse range of plant functions including cell wall formation and stability, maintenance of structural and functional integrity of biological membranes, movement of sugar or energy into growing parts of plants, and pollination and seed set.

Didelphic, amphidelphic ovaries are found in Tylenchorhynchus, Helicotylenchus, and Hoplolaimus.
When there is one ovary that condition is known as monodelphic and when the number is two, the condition is called didelphic. In monodelphic conditions, the ovary is always, anteriorly directed, i.e Prodelphic.
Tylenchorhynchus is a genus of nematodes including many species of plant parasites. The classification of stunt nematodes - those including the genus Tylenchorhynchus - is unstable; many newly discovered species within this genus are reconsidered to be subspecies.
Helicotylenchus is a genus of nematodes in the family Hoplolaimidae. They are known generally as spiral nematodes.
Hoplolaimus is a genus of nematodes known commonly as lance nematodes. They are parasites of plants, and three species are pests of crops.

Caterpillars drop on strands of silk when disturbed is known as Reflex dropping.
Reflex bleeding is a defensive behaviour in some insects where a noxious fluid is exuded by the insect when threatened.
The fluid flows out through pores in the exoskeleton. The secretion consists of a bitter fluid, including haemolymph and noxious chemicals.

Biological control component is central to advancing agricultural production. Among the given options Insect hormone analogues are used as a third generation pesticide.
Three insect hormones have been implicated in the control of division of labor in insect societies: juvenile hormone (JH), ecdysteroids and insulin.
Juvenile hormone analogues (JHAs) are a type of insect growth regulator used for pest control. In immature stages of insects, the titer of juvenile hormone (JH) is maintained at a high level to ensure larval growth and suppress metamorphosis.

Berry borer is an introduced pest of coffee.
The coffee stem borer is the pest of Arabica coffee, whereas the shot hole borer prefers robusta coffee. In certain areas the severe attack of white stem borer leads to discontinuation of the crop.
Several insect pests have been reported in coffee, the most important being the coffee leaf miner, the coffee berry borer, and the coffee stem borers.