Cultural Practices and Resistant Varieties in Potato
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Cultural Practices and Resistant Varieties in Potato. Dr. S.K. Dutta & Dr. Badal Bhattacharyya Department of Entomology Assam Agricultural University,Jorhat-13.

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Dr. S.K. Dutta & Dr. Badal Bhattacharyya Department of Entomology

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Dr s k dutta dr badal bhattacharyya department of entomology

Cultural Practices and Resistant Varieties in Potato

Dr. S.K. Dutta & Dr. Badal Bhattacharyya

Department of Entomology

Assam Agricultural University,Jorhat-13


Dr s k dutta dr badal bhattacharyya department of entomology

Summer deep ploughing (end of July to middle of August) to expose the different life stages of soil insect pests to expose them to predatory birds and desiccation by sunlight

Fig. 1. Predatory birds feeding on insects exposed by summer

deep ploughing

Fig. 2. White grubs collected after summer

summer deep ploughing

Source: www.ainpwgosa.com


Follow crop rotation to avoid pest infestation in potato

Follow crop rotation to avoid pest infestation in potato

Crop Sequence:

Rice-Rice-Potato

Summer Rice – potato

Rice-Potato-Cowpea

Rice-Potato-Green gram


Dr s k dutta dr badal bhattacharyya department of entomology

Adjustment of planting and harvesting time for avoidance of insect infestation

Fig. 3. Harvesting of potatoes

Source:http://www.angelicorganics.com/Newsletters/2008Week16VegNewsWed.html


Dr s k dutta dr badal bhattacharyya department of entomology

Maintain weed free crop initially up to six weeks after planting by resorting to two hand hoeing / earthing up operations at 3rd and 6th weeks of planting

Fig. 4. Earthing up in potato field

Source: AINP on White grub, Assam Agricultural University, Jorhat-13


Dr s k dutta dr badal bhattacharyya department of entomology

Ensure growing of healthy crops with optimum plant population (1,30,000 plants/ha ) by using recommended seed rate (22.5-25 q/ha) and balanced doses of fertilizers (NPK @ 60:50:50 in rainfed and 60:100:100 in irrigated condition)

Adjustment of planting time of summer crop in hilly areas to prevent aphid attack


Prepare high ridges to avoid exposure of seed tubers to egg laying by potato tuber moth

Prepare high ridges to avoid exposure of seed tubers to egg laying by potato tuber moth

Fig. 5. High ridging in potato

Source: AINP on White grub, Assam Agricultural University, Jorhat-13


Dr s k dutta dr badal bhattacharyya department of entomology

Keeping plant debris/green grasses at different locations of cut worm infested field in the evening, which serve as hiding places for cut worm larvae , where they could be destroyed next day

Fig. 6. Cut worms exposed from under green grass

Source: http://www.google.com/imgres?imgurl=http://www.saferbrand.com/resource


Allow time for previous crop residue to decompose

Allow time for previous crop residue to decompose

Fig. 7. Decomposition of crop residues

Source: http://www.google.com/imgres?imgurl=http://farm2.static.flickr.com


Rouging of volunteer potato plants to reduce aphid infestation

Rouging of volunteer potato plants to reduce aphid infestation

Fig. 8. Rogueing of volunteer potato plants

Source: http://www.google.co.in/search?hl=en&biw=1090&bih=462&gbv=2&tbm=isch&sa


Dr s k dutta dr badal bhattacharyya department of entomology

Removal and destruction of infested tubers to check tuber moth infestation in both storage and field conditions

Fig. 9. Potato tubers infested by tuber moth

Source: http://thesecondgreenrevolution.blogspot.com/2009_11_01_archive.html


Dr s k dutta dr badal bhattacharyya department of entomology

Do not keep harvested potato tubers in the field to prevent egg laying by tuber moth

X

Fig. 10. Keeping harvested potato in field

Source:http://www.google.com/imgres?imgurl=

http://www. hrefresh.com/

Fig. 11.Potato infested by tuber moth

Source:http://www.google.com/imgres?im

gurl=http://www.inra.fr/hyppz/IMAGES


Dr s k dutta dr badal bhattacharyya department of entomology

Grow potato in well pulverized soil. Proper soil pulverization decreases wireworm population both by direct injury and by exposing them to desiccation or predation by birds

Fig. 13. Proper pulverization of soil decreases wire worm population

Source:http://www.google.co.in/imgres?imgurl=http://cdn.wn.com

Fig. 12. wire worms

Source:http://www.google.co.in/imgres?imgurl=http://www.fruitandveggie.com


Dr s k dutta dr badal bhattacharyya department of entomology

Standing water for short period before sowing can help to eliminate the eggs of mole crickets

Fig. 14. Keeping standing water in field for short period

Source: http://photography.nationalgeographic.com/photography/photo-

tips/landscape-photos/#/potato-field-india_21021_600x450.jpg


Dr s k dutta dr badal bhattacharyya department of entomology

Construct raised nursery to reduce the seedling damage by mole crickets

Fig.15. Construction of raised potato nursery

Source: http://www.kvktuensang.org.in/gallery.html


Dr s k dutta dr badal bhattacharyya department of entomology

Potato crop irrigated at 30 and 60 days after germination reduces red ant infestation in potato

Fig. 16. Irrigation in potato field

Source: AINP on White grub, Assam Agricultural University, Jorhat-13


Dr s k dutta dr badal bhattacharyya department of entomology

Liming @ 3.5 quintal/hectare prior to sowing of potato tubers reduces red ant infestation

Fig. 17. Lime

Source: http://www.google.com/imgres?imgurl


Dr s k dutta dr badal bhattacharyya department of entomology

Pulling and burning of heavily mite infested potato plants

Fig. 18. Burning of potato plants

Source: / http://evapm.deviantart.com/art/Burning-Potato-Stems-139402088


Dr s k dutta dr badal bhattacharyya department of entomology

Abundant ground water, straw retention technique and soils with high organic matter content provide ideal moisture level and shelter to snails and slugs. In snail endemic areas such conditions may be discouraged to a preferable extent or kept at optimum.

Fig. 19.Snails and slugs

Source http://www.google.com/imgres?imgurl=http://ddandkw.com


Resistant variety

Resistant variety

Avoid planting new crops downwind from those infested with mites, as the mites will be spread to the new crop by the wind.

Kufri Chandramukhi may be grown in aphid/leaf roll/ potato virus Y endemic areas


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