Horticulture - Study Mode
[#846] Big Vein of lettuce is transmitted by
Correct Answer
(B) Fungus
Explanation
Solution: Big Vein of lettuce is a viral disease that affects lettuce crops. The disease is transmitted by a soil-borne fungus called *Olpidium brassicae* . Olpidium brassicae does not cause the disease directly but acts as a vector that transmits the Mirafiori lettuce big-vein virus (MLBVV) into the plant. This fungus infects the roots of the lettuce plant and facilitates the entry of the virus that leads to the characteristic enlarged veins in the leaves. Nematodes , bacteria , and aphids are known to spread other types of plant diseases, but they are not responsible for transmitting Big Vein disease in lettuce. Therefore, the correct answer is Fungus.
[#847] . . . . . . . . cultivation is mostly concentrated in peri-urban areas.
Correct Answer
(D) Vegetables
Explanation
Solution: Vegetable cultivation is mostly concentrated in peri-urban areas. Peri-urban areas are zones of transition from rural to urban land uses located between the outer limits of urban and regional centres and the rural environment. The boundaries of peri-urban areas are porous and transitory as urban development extends into rural and industrial land.
[#848] Cat face is a physiological disorder of
Correct Answer
(D) Tomato
Explanation
Solution: Cat facing is a physiological disorder of field and greenhouse tomatoes. It refers to a type of physiological damage affecting tomatoes and is represented by scarring and cavities near the blossom end. It is the abnormal development of plant tissue affecting the ovary or female sex organ (pistillate), which results in the flower, followed by the fruit development to become malformed.
[#849] Wood apple belongs to the family
Correct Answer
(B) Rutaceae
Explanation
Solution: Wood apple belongs to the family Rutaceae. The botanical name of the wood apple is Limonia acidissima . It is a large tree growing to 9 metres (30 ft) tall, with rough, spiny bark. The leaves are pinnate, with 5 - 7 leaflets, each leaflet 25 - 35 mm long and 10 - 20 mm broad, with a citrus scent when crushed. The flowers are white and have five petals. The fruit is a berry 5 - 9 cm in diameter and may be sweet or sour. It has a very hard rind which can be difficult to crack open, it appears greenish-brown in colour from the outside and contains sticky brown pulp and small white seeds.
[#850] Inflorescence of Coriander is called
Correct Answer
(B) Umbel
Explanation
Solution: The inflorescence of coriander is called Umbel. It is the racemose inflorescence, also known as a compound umbel. An umbel is an inflorescence that consists of several short flower stalks (called pedicels) that spread from a common point, somewhat like umbrella ribs. The word was coined in botanical usage in the 1590s, from Latin umbella "parasol, sunshade".