Agricultural Entomology MCQ Question and Answer | Agriculture MCQ Question

Light producing insect family is Lampyiridae.
Fireflies (Coleoptera: Lampyridae) are charismatic insects that have been fruitful model systems for research.
Firefly populations have been declining worldwide, but the conservation status of Neotropical species remains elusive.

All the statements given in the options are correct.
A. Flat fan spray nozzles are widely used for broadcast spraying of herbicides and insecticides. These nozzles produce a tapered-edge, flat-fan spray pattern.
B. Flooding fan nozzle "turbo floodjet" is designed for use with soil-incorporated herbicides and liquid fertilizers.
These are ideal for high application rates and speeds because they produce a wide-angle. Operating flood-jet nozzles at 5 - 25 psi minimizes drift, but pressure changes critically affect the width of the spray pattern.
C. Cone nozzles is a low-drift nozzle and is used to apply soil incorporated herbicides.
Full cone nozzles produce medium- to large-size drops forming a solid cone-shaped spray pattern with a round impact area. The unique vane design features large flow passages to provide superior control and uniform distribution.

Rotting and dropping of guava fruits is due to Helopeltis antonii.
Both adults and nymphs feed on various sites ranging from tender shoots, buds, stems, and even their fruiting bodies to obtain sap. H. antonii possess modified mouthparts that work to form a long straw-like structure known as a "stylet”.
Injured plants are no longer able to allocate their desired resources to fruit/seed production, rather, they are forced to allocate resources and energy to damage control and repair.

Water trap is used for WBPH.
White Backed Plant Hopper (WBPH) is the bioassay on F3 pyramided transgenic rice lines along with parents and control plants.
The water trap provides a water seal between the appliance and the external drains or outside atmosphere.
The water trap will prevent smells, insects and bacteria from coming back up the waste pipework into your building. The trap will only work and prevent smells when it has water inside which provides the water seal.

The control of caterpiller is also done by Bacillus thuringiensis.
Bacillus thuringiensis (Bt) is known as the most successful microbial insecticide against different orders of insect pests in agriculture and medicine. Moreover, Bt toxin genes also have been efficiently used to enhance resistance to insect pests in genetically modified crops.
It is used to kill beetles and the larvae of mosquitoes, black flies, caterpiller, and moths. Bt is also toxic to nematodes. Bt has been registered for use in pesticides by the U.S. Environmental Protection Agency since 1961.

Cerci is absent in Psocoptera and Hemiptera insect order.
Cerci (singular cercus) are paired appendages on the rear-most segments of many arthropods, including insects and symphylans.
Psocoptera are a paraphyletic group of insects that are commonly known as booklice, barklice or barkflies. The abdomen has nine segments and no cerci.
Hemiptera is an order of insects, commonly called true bugs and they lack cerci.

The true name of BHC is HCN.
benzene hexachloride (BHC), any of several stereoisomers of 1,2,3,4,5,6-hexachlorocyclohexane formed by the light-induced addition of chlorine to benzene.
It is used commercially for fumigation, electroplating, mining, chemical synthesis, and the production of synthetic fibers, plastics, dyes and pesticides.

Type of oesophagus, where procorpus and metacorpus are fused to give a separate muscular bundle is Criconematid type.

The family of the insect order Hemiptera having loop veins in forewing is Miridae.
The Miridae are a large and diverse insect family at one time known by the taxonomic synonym Capsidae.
One useful feature in identifying members of the family is the presence of cuneus, it is the triangular tip of the corium, the firm, horny part of the forewing, the hemelytron.
The cuneus is visible in nearly all Miridae, and only in a few other Hemiptera, notably the family Anthocoridae, which are not much like the Miridae in other ways.

Immatures of Neuroptera can be classified as Predators.
The insect order Neuroptera, includes the lacewings, mantidflies, antlions, and their relatives. The order consists of some 6,000 species.
The larvae are specialized predators, with elongated mandibles adapted for piercing and sucking. The larval body form varies between different families, depending on the nature of their prey.