Horticulture MCQ Question and Answer | Agriculture MCQ Question

Little leaf in brinjal is caused by Mycoplasma.
Little leaf of brinjal or eggplant (Solanum melongena L.) is one of the most serious diseases of brinjal in the areas of its cultivation.
The disease is caused by a plant pathogenic mollicute, Phytoplasma (earlier known as a mycoplasma-like organism or MLO) and is transmitted by the insect vector, Hishimonus phycitis which belongs to the group of leafhoppers.
Symptoms of the disease include the shortening of the petioles and the production of leaves that are much smaller in size. Petioles are so short that leaves seem to be glued to the stem. They become soft and yellow. Affected plants do not bear any flowers or fruits if infection is in the early stages of plant growth.

In the floating garden, a floating base is prepared from the roots of Typha grass.
A floating garden is a planting on soil buoyed up (as on the surface of a lake) by rafts of interlaced branches or other floating support found chiefly in the Mexico City area and parts of Kashmir.
A floating base is made from the roots of typha grass or any other similar type of material. The floating base is kept in the water and seedlings are transplanted on leaf compost made out of the local vegetation growing in the area.

The black tip of mango is caused by pollutant gases such as carbon monoxide, Sulphur dioxide, flouride, etc that emanate from brick kiln fumes. It is not caused by any microorganisms such as viruses, fungi and bacteria.
The black tip is a serious disorder that is capable of causing considerable set back to the grower. Among the commercial cultivars, Dashehari is most prone to the disorder, while Lucknow Safeda is least.
A spray of 1% borax at the time of fruit set, followed by two more sprays at 10-day intervals might be useful in controlling the disorder.

Pungency in garlic is due to Diallyl disulphide.
Garlic belongs to the Allium family of plants that produce organosulfur compounds, such as allicin and diallyl disulfide (DADS), which account for their pungency and spicy aroma.
Diallyl disulfide is an organic disulfide where the organic group specified is allyl. It has been isolated from garlic and other species of the genus Allium. It has a role as an antineoplastic agent, an antifungal agent and a plant metabolite.

A medicinal plant with antiobesity properties is Guggal.
Guggul is used for acne, hardening of the arteries (atherosclerosis), weight loss and other conditions.
It is a flowering plant in the family Burseraceae, which produces a fragrant resin called guggal, that is used in incense and Vedic medicine.

Sweet potato is a drought-resistant crop.
Drought resistance or tolerance is a broader term applied to plant species with adaptive features that enable them to escape, avoid, or tolerate drought stress.
The prolific root system of sweet potato makes it a drought-tolerant crop, although supplementary irrigation is required at the time of planting for proper sprouting and establishment. Water stress reduces stem extension and internode diameter of sweet potato cultivars.

The maximum concentration of inverted sugar in Jam should not exceed 40%.
Inverted sugar syrup is a syrup mixture of the monosaccharides glucose and fructose, that is made by hydrolytic saccharification of the disaccharide sucrose.
Jam contains inverted sugar formed by the heating process and the acid content of the fruit. This sugar preserves the jam for long periods. Golden syrup is a syrup of about 55% inverted syrup and 45% table sugar (sucrose).

Horticultural Society of India (HSI) was set up in 1942 at Pusa.
The Indian Academy of Horticultural Sciences ( formerly the Horticultural Society of India) had its headquarters at Lyallpur, Punjab (now in Pakistan) on its inception on 1^st January 1942. The headquarters of the Society was shifted to Delhi from Lyallpur in March 1949 after the partition of the country and was housed therein.

Spice Board works under the Ministry of Commerce.
Spices Board is a statutory body constituted with effect from 26^th February 1987 under the Spices Board Act, 1986 by merging the erstwhile Cardamom Board and the Spices Export Promotion Council under the administrative control of the Department of Commerce.
The main aim of this board is to develop, promote and regulate the export of 52 spices and spice products that fall under its purview. It also engages in the promotion of production, processing, domestic marketing, and export of cardamom (both small and large).

Pineapples belong to which family Bromeliaceae.
It is a tropical plant with edible fruit; it is the most economically significant plant in the family Bromeliaceae.
Pineapples grow as small shrubs; the individual flowers of the unpollinated plant fuse to form multiple fruits. The plant is normally propagated from the offset produced at the top of the fruit, or from a side shoot, and typically matures within a year.
Raw pineapple pulp is 86% water, 13% carbohydrates, 0.5% protein and contains negligible fat.