Horticulture MCQ Question and Answer | Agriculture MCQ Question

Purple top roll disease of potato is transmitted by leaf hopper.
The disease was also observed in 2003 and 2004, especially in organic potato fields.
A graft transmissible disease of potato termed purple top roll is prevalent in several potato varieties grown in the hilly tracts of India.
The common symptoms are rolling of the basal parts of younger leaves, sometimes accompanied by pink or purple pigmentation.

The moisture level for better storage of vegetables is 20%.
Moisture content affects the processibility, shelf-life, usability and quality of a product. Accurate moisture content determination, therefore, plays a key role in ensuring the quality of vegetables.
A general rule for vegetables is that cool-season crops should be stored at cooler temperatures (32 to 35°F) and warm-season crops should be stored at warmer temperatures (45 to 55°F).

The synthetic variety of cabbage is Pusa Sambandh.
The heads of this variety are medium in size and high yielding variety. Its average yield is 35 - 46 t/ha. Heads are round and weigh 2 - 4 kg. Harvested within 80 - 90 days after transplanting. It is a Mid-season variety.

The origin place of the pineapple is Brazil.
The pineapple (Ananas comosus) is a tropical plant with edible fruit, it is the most economically significant plant in the family Bromeliaceae.
The wild plant originates from the Parana - Paraguay River drainages between southern Brazil and Paraguay. The Portuguese took the fruit from Brazil and introduced it into India by 1550.

Cross protection is done in citrus against Tristeza disease.
Cross protection is a type of induced resistance developing in plants against viruses.
Tristeza is one of the very few virus-induced diseases where mild strain cross-protection has been used successfully in commercial production of various tree crops and is currently the only way a citrus industry faced with severe and destructive stem pitting CTV (Citrus Tristeza Virus) can survive.

Guava belongs to the family Myrtaceae.
It is a common tropical fruit cultivated in many tropical and subtropical regions. It is a small tree in the Myrtle family, native to Mexico and Central America.
Guavas are typical Myrtoideae, with tough dark heavy leaves that are opposite, simple, elliptic to ovate, and 5 - 15 centimeters (2 - 6 in) long. The flowers are white, with five petals and numerous stamens. The fruits are many-seeded berries.

GMS is exploited in the commercial hybrid seed production of Musk melon.
GMS is Genetic male sterile and is exploited for commercial hybrid seed production for producing F1 hybrid seeds.
Mono-genic recessive GMS is maintained by backcrossing it with a heterozygous isogenic line for male sterility. Therefore, in the hybrid seed production field, 50% of male fertile segregants need to be identified and removed before they shed pollen.

Type of fruit in Citrus spp. is Hesperidium.
A hesperidium (plural hesperidia) is a modified berry with a tough, leathery rind. The outer ovary wall becomes the thick spongy layer of the rind, while the inner ovary wall becomes very juicy with several seeds. The peel contains volatile oil glands in pits.
Oranges, lemons, limes and grapefruit are all common examples of hesperidia.

The first transgenic crop commercially cultivated in our country is Cotton.
Bt cotton was approved by the Government of India in March 2002 as the first transgenic crop for commercial cultivation for three years. Bt cotton plants contain one or more foreign genes derived from the soil-dwelling bacterium, Bacillus thuringiensis.
Apart from cotton, there are more than 20 crops under research and development in about 50 public and private sector organizations in India.

The flowering season of gladiolus is Spring and Summer.
In areas having moderate climatic conditions, gladiolus can be grown throughout the year. Gladiolus can be grown in a wide range of climatic conditions. It can be grown from plains to an altitude of 2500 m.
Gladioli grow from round, symmetrical corms that are enveloped in several layers of brownish, fibrous tunics. The flowers of unmodified wild species vary from very small to perhaps 40 mm across and inflorescences bear anything from one to several flowers.