Advisory for the month of February 2019

 

Harvesting of late kharif onion and garlic crops may begin this month in timely planted crop. However, rabionion and onion seed crops will stay in the fields for another 2-3 months. In these conditions, the following advisory should be followed.

A. For late kharifonion crop

1.      If bolting is observed, the bolted plants should be harvested immediately. Bolters are also source of contamination for seed crop.

2.      Pesticide sprays should be stopped 20 days before harvesting.

3.      Irrigation should be stopped at 105 days after transplanting.

4.      Crop should be harvested after attaining 50% neck fall.

5.      Harvested bulbs may be left in the field for 3 days for curing which makes bulbs firm and dry and helps in improving shelf life.

6.      After 3 days of field curing, the tops should be removed leaving 2.0-2.5 cm stalk above the bulbs and bulbs should be shade cured for 10-12 days for better storage.

B. For rabionion crop

1.        If there is an incidence of thrips/foliar diseases, spray of profonophos (1 ml/L) along with hexaconazole (1 g/L) is recommended.

2.        If profonophos (1 ml/L) + hexaconazole (1 g/L) spray has been already made, aspray of fipronil (1 ml/L) along with propiconazole (1 g/L) is recommended after 15 days of previous spray, if required.

3.        Top dressing of nitrogen @ 35 kg/ha has to be applied at 30 and 45 days after     transplanting.

4.        Hand weeding should be done at 40-60 days after transplanting.

5.        Foliar application of micronutrient mixture (5 g/L) is recommended at 45 and 60 days after transplanting.

6.        Irrigation should be done timely, as per requirement.

C. For garlic crop

1.      Foliar application of elemental sulphur (2 g/L) is recommended to control red spider mite.

2.      Foliar application of dicofol (2 ml/L) is recommended after 15 days of sulphur spray to control red spider mite, if required. 

3.    First prophylactic spray of carbosulfan (2 ml/L) along with tricyclozole (1 g/L) is recommended to control diseases and pests, if required.

4.     Second spray of profenophos (1 ml/L) along with hexaconazole (1 g/L) is recommended after 15 days of first spray, if required.

5.  If first two sprays were over, thirdspray of fipronil (1 ml/L) along with propiconazole (1 g/L) is recommended after 15 days of second spray, if required.

6.      Pesticide sprays should be stopped at 20 days before harvesting.

7.      Garlic should be harvested after 50% drying of leaves.

8.      Harvesting should be done by pulling the plants out along with bulbs.

9.   Garlic bulbs along with top may be cured/dried in the field for 2-3 days after harvesting to increase storage life by minimizing microbial and fungal infection and water loss during storage.

D. For onion seed crop

1.   After flowering, no chemical sprays be made otherwise it will adversely affect the pollinators.

2.   Hand weeding may be done if absolutely necessary and care should be taken so that flower stalks are not damaged.

3.   In case honey bee activity is less, 1-2 honey bee hives/acre can be placed for improving seed setting.

4.   Crop should be irrigated timely as per requirement.

 

Note:Carbosulfan, profenophos, fipronil and dicofol are recommended only when the thrips damage is visible. Mancozeb, hexaconazole, propiconazole and tricyclozole are recommended only when the disease incidence is visible.