Horticulture - Study Mode

[#451] Which one of the following is the gynodioecions cultivar of papaya?
Correct Answer

(D) Pusa Majesty

Explanation

Solution: Pusa Majesty is one among the following that is the gynodioecions cultivr of papaya. It is a gynodioecious line, tolerant to viral diseases and root knot nematodes. The variety is suitable for papain production and is comparable to C0.2 variety for papain yield. The fruits are medium-sized, 1 - 1.5 kg in weight, round in shape and have better keeping quality. It starts fruiting 146 days from the time of transplanting. The variety is tolerant to root knot nematode.

[#452] % of outcrossing in autogamous crops is
Correct Answer

(C) < 5%

Explanation

Solution: Percent of outcrossing in autogamous crops is < 5%. Autogamous plants are such plants in which pollination of a flower occurs by its own pollen. Outcrossing, also known as allogamy or xenogamy, is the transfer of gametes from one individual to another, genetically different individual. Thus, percentage of outcrossing is very less in case of autogamous plants.

[#453] Pollination behaviour of Robusta coffee is
Correct Answer

(B) Cross pollinated

Explanation

Solution: Pollination behavior of Robusta coffee is Cross pollinated. The Robusta coffee plant depends on cross pollination. Robusta requires cross-pollination by wind and insects. The main pollinators of coffee flowers are different kinds of bees. About 6 - 8 weeks after each coffee flower is fertilized, cell division occurs and the coffee fruit remains as a pin head for a period that is dependent upon the climate.

[#454] Little leaf in brinjal is caused by
Correct Answer

(C) Mycoplasma

Explanation

Solution: 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.

[#455] In floating garden, floating base is prepared from the roots of . . . . . . . .
Correct Answer

(C) Typha grass

Explanation

Solution: 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.