Onion seed production | onion seed farming :- Soil and climate requirements :- Well drained medium to heavy soil. PH range of 6.5 to 7.5 are good for onion seed production. Flowering initiation in onion takes place at a comparatively cooler temperature(15 - 25 degree celcius). Higer temperature are favourable only for seed ripening and maturity. Low temperature at the time of bulb planting (nov - dec). Moderate temperature during stalk development, flowering and seed setting (january - feb). Warm temperature at seed maturity and drying (march - april). Field preparation and planting :- A deep ploughing and incorporation of well decomposed FYM @ 20t per hectare creates good soil tilth. Ridges and furrows are common planting method. Selection of mother bulb :- The 5m distance should be maintain from other onion field for avoiding contamination of bulbs of another variety. Harvest of rabi season already catches enough resting period, but the bulb harvested in kharif need to give a resting...
All about aphid and there life cycle, how they reproduce, how they damage crops, how they develop, how to control them( cultural practices, biological practices, and chemical practices) WATCH NOW About an Aphid:- A very tiny insect have soft bodied peer shaped with long legs and antennae. may be green, yellow, brown, red or black depending on the species and the host. a few species are appear waxy or wolly due to the secretion of a waxy white or grey substance over their body surface. Have a cornicles:- the presence of Cornicles distinguishes aphid from all other insect, a pair of horn shaped tubes located on the dorsal side of an aphids abdomen that secrete a defensive wax fluid and alarm pheromones to deter predators and alert other aphid from danger. Generally adult aphids are wingless but occurs in winged form when population becomes high on the same host. They are found on the underside of lgrowt, on stems, on new buds or other new succulent...