Horticulture - Study Mode

[#481] Application of . . . . . . . . PPM GA 3 at 2 and 4 true leaf stage in cucumber promotes the induction of male flower.
Correct Answer

(D) 1500 - 2000

Explanation

Solution: Application of 1500 - 2000 PPM GA 3 at 2 and 4 true leaf stage in cucumber promotes the induction of male flower. Foliar application of GA 3 was found significantly superior over control in terms of different growth, flowering and fruiting behaviours of cucumber. Induction of male flowers in gynoecious cucumber cultivars was assessed by single and combinatorial spraying of AgNO 3 (3 mM), GA 3 (1.5 mM) and CoCl 2 (3 mM) after the first true leaf emergence.

[#482] The crop showing greatest inbreeding depression is
Correct Answer

(A) Onion

Explanation

Solution: The crop showing the greatest inbreeding depression is Onion . Inbreeding depression is the reduced survival and fertility of offspring of related individuals. They reproduce either by the self-pollination or cross-pollination process. This phenomenon is observed in several other plant species that are further grouped based on the following four categories.

[#483] Phalsa belongs to the botanical family
Correct Answer

(C) Tiliaceae

Explanation

Solution: Phalsa belongs to the botanical family Tiliaceae . Tiliaceae is a family of flowering plants. It is being sunk in Malvaceae. Grewia asiatica , commonly known as phalsa or falsa, is a species of flowering plant in the mallow family Malvaceae (Tiliaceae). It was first found in Varanasi, India and was taken by Buddhist scholars to other Asian countries and the rest of the world. The fruit is an edible drupe 5 - 12 mm in diameter, purple to black when ripe.

[#484] Largest producer of cauliflower is
Correct Answer

(A) China

Explanation

Solution: China was the world's largest producer of cauliflower, accounting for 44% of total production followed by India with 29% of the world's total. China and India produce together more than 70% of the world's total cauliflower and broccoli. In 2020, cauliflower production in China amounted to approximately 9.5 million tons.
Cauliflowers are original from Asia, where they are known for many centuries. However, their spreading to other continents did not take place until the 18 th century. At present, it is mainly cultivated in Asia and the main producing countries are India, China, Italy and France.

[#485] Oil palm is pollinated by
Correct Answer

(B) Weevil

Explanation

Solution: Oil palm is pollinated by Weevil . Weevils are beetles belonging to the superfamily Curculionoidea, known for their elongated snouts. They are usually small, less than 6 mm in length and herbivorous. The pollinating weevil, Elaedobius kamerunicus (EK) has been known to be the most efficient insect pollinator of oil palm and has successfully improved oil palm pollination and increased the yield. Pollination occurs because this beetle is attracted by the scent of flowers, especially male flowers that are stronger in aroma than female flowers. Its introduction has greatly reduced the need for assisted pollination.