Horticulture - Study Mode

[#941] The growth regulator used to reduce flower drop in chilli is
Correct Answer

(C) NAA

Explanation

Solution: The growth regulator used to reduce flower drops in chili is NAA. Spraying of NAA (20 ppm) at 30 days after planting to get early flowering, increased number of flowers, fruit set, and reduced flower drop and fruit drop. Spraying of NAA (50 ppm) at the beginning of flowering in chili was found to reduce flower drop as compared to control.

[#942] TSS of ripe muskmelon lies between
Correct Answer

(A) 11 - 17%

Explanation

Solution: TSS is total soluble solids. It is equivalent to the percentage of a reference sugar solution. The TSS is mainly composed of sugars (fructose). Minimum sugar values in melon fruits need to be 8%. Melons with a sugar content of 10 - 12% have, as defined by US grading standards, a 'very good eating quality'. They will also transport well. TSS of ripe muskmelon lies between 11 - 17%.

[#943] Which one of the following is also known as "Egg plant"?
Correct Answer

(C) Brinjal

Explanation

Solution: Brinjal is also known as Eggplant. Brinjal is the Indian name of this vegetable, also called by the same name in Singapore, Malaysia and South Africa. It is called Eggplant in the US, Canada and Australia. Its scientific name is Solanum melongena belongs to the nightshade family i.e. Solanaceae. It is grown worldwide for its edible fruit.

[#944] Which one of the following is dioecious plant
Correct Answer

(D) Pointed gourd

Explanation

Solution: The pointed gourd is the dioecious plant among the following options. A dioecious plant has either male or female flowers, not both. For dioecious plants to reproduce, a male plant must be near a female plant so that pollinators can do their work. Trichosanthes dioica , also known as the pointed gourd is a vine plant in the family Cucurbitaceae, similar to cucumber and squash, though unlike those it is perennial. It is a dioecious (male and female plants) vine (creeper) plant with heart-shaped leaves (cordate) and is grown on a trellis. The fruits are green with white or no stripes. Size can vary from small and round to thick and long 2 to 6 inches. It thrives well under a hot to moderately warm and humid climate.

[#945] Which temperature range is suitable for the development of red colour in tomato fruits?
Correct Answer

(A) 18° - 25°C

Explanation

Solution: The temperature range that is suitable for the development of red colour in tomato fruits is 18° - 25°C . The red colour of tomato fruit is due to the carotenoid known as Lycopene. And it develops at a definite temperature range. However, the formation of lycopene is inhibited when the temperature of the fruits exceeds 30 degrees Celcius. High temperature affects the fruit set and development. Also, the plants cannot withstand low temperatures, frost and high humidity.