Agricultural Entomology - Study Mode
[#371] Father of host plant resistance is
Correct Answer
(B) R. H. Painter
Explanation
Solution: The Father of host plant resistance is R. H. Painter. Host plant resistance is defined as the intentional use of resistant crop cultivars to reduce the negative impacts of pests or diseases on crop production systems. R. H. Painter is the father of host plant resistance. Host plant resistance means characters that enable a plant to avoid, tolerate, or recover from attacks from insects.
[#372] Heat spot is caused by
Correct Answer
(D) Sitophilus oryzae
Explanation
Solution: Heat spot is caused by Sitophilus oryzae. The rice weevil or Sitophilus oryzae is a stored product pest that attacks seeds of several crops, including wheat, rice, and maize. Larva as well as the adult cause damage to grains. Larvae feed inside the seed and make it hollow and exit by making a circular hole on the surface. Adults can damage several seeds by cutting an irregularly lined circular hole, through which they feed on the kernel.
[#373] Honeybees are used for
Correct Answer
(C) Apiculture
Explanation
Solution: Honeybees are used for Apiculture. Apiculture (or Beekeeping) is the maintenance of bee colonies, commonly in man-made beehives. Honey bees in the genus. The keeping of bees by humans, primarily for honey production, began around 10,000 years ago. Georgia is known as the "cradle of beekeeping" and the oldest honey ever found comes from that country. Bee hives are kept in an apiary or "bee yard".
[#374] Surface layer of cocoon is called as
Correct Answer
(D) Floss
Explanation
Solution: Surface layer of cocoon is called as Floss. Floss silk is the filaments from the soft, internal covering of a silkworm cocoon, and in particular from the places where the cocoon is not damaged by the caterpillar. Floss silk is normally classed as a continuous filament. The silk is unravelled off the cocoon, dyed and then made into hanks. Silk fibroin (SF) is a crystalline protein-based fiber surrounded by layers of the gum sericin protein, which reinforces the cocoon structure, where it is very suitable for the subsequent development and metamorphosis of the matured larvae to pupae.
[#375] Sotto disease of silkworm is caused by
Correct Answer
(B) Bacteria
Explanation
Solution: Sotto disease of the silkworm is caused by Bacteria. It is caused by toxin of Bacillus thuringensis. The larvae become unconscious, soft, and darkish and rot off. It is caused by a virus called Morator Virus which does not form polyhedra in the body of silkworm larvae. The infection occurs mainly through oral cavity.