BHENDI YELLOW VEIN CLEARING

1. Bhendi Yellow Vein Clearing
STUDENT
Miss. PANDEESWARI P
ID. No. 2015021091
COURSE TEACHER
Dr. PARTHASARATHY S
Asst. Professor (Plant Pathology)

2.  Okra (Abelmoschus esculentus L. Moench) belongs to
the family Malvaceae.
 It is an important growing crop of Indo-Pak sub-
continent.
 This viral diseases infects during all the stages of
growth. The most susceptible stage of is from 35 to 50
days.

3.  Bhendi yellow vein mosaic was first reported
in okra plants in 1924 in India and Sri Lanka.
 It is the most devastating disease in all the bhendi
growing regions of India.

4.  The great loss observed during rainy season.
 In case the plants get infected at early stages of
development it causes 80% of crop loss.
 If the plants are infected at 50 and 65 days after
germination suffer a loss of 84 and 49 percent
respectively. The extent of damage declines with the
delay in infection.

5. Group II : ssDNA virus
Family : Geminiviridae
Genus : Begomovirus
Species : Bhendi yellow vein mosaic virus

6.  The symptoms include alternate green and yellow
patches, vein clearing, and vein chlorosis of leaves.
 The yellow network of veins is very conspicuous,
and vein and veinlets are thickened.

7.  In severe cases, the chlorosis may extend to the
interveinal area and may result in complete
yellowing of leaves.
 Infected plants stunted and bear very deformed and
small, yellow green fruits.

8. ©apsnet.org

9. ©https://virologyj.biomedcentral.com

10. ©https://virologyj.biomedcentral.com

11.  Pathogen name: Bhendi yellow vein mosaic virus
 Wild hosts of virus : Rail weed (Croton sparsiflora),
and goat weed (Ageratum sp).
 The causal agent is the single-stranded DNA.

12.  Vector -Whitefly- Bemisia tabaci - Aleyrodidae
 The whitefly vector reproduces to significant
numbers during the summer season when it
transmits the virus between okra plants.

13. ©agritech.tnau.ac.in/crop-protection

14.  The insect vectors transmit the virus from wild hosts
to the main crop. The disease is not seed borne.
 A continuous cycle is maintained through wild or
cultivated hosts.
 Climatic factors favour the population build up of
vectors and the prevalence of wild hosts.

15.  Grow resistant varieties like Parbhani Kranti, Arka
Abhay, Arka Anamika and Varsha Uphar to minimise
the incidence of the disease.
 Maintain proper crop spacing.
 Raise maize as a border crop to trap the insect.
 Set up yellow sticky traps @12/acre above the plant
height to minimize the pest incidence.

16.  Synthetic Pyrethroids should not be used because
they will aggravate the situation.
 When the infestation is 5-10 nymphs or adults per
leaf before 9 A.M. then go for chemical control:
 Spray acephate 75% SP @ 3 gm/ lit of water.
 Apply chlorpyrifos 20% EC @ 2.5 ml + Neem oil @ 2 ml/
litre of water

17.  R.S.Singh, Plant Diseases, Oxford &IBH
Pubilshing, co.pvt.Ltd-9th Edition, New Delhi.
PageNo(539-542).
 https://www.apsnet.org
 https://www.plantwise.org
 https://www.ncbi.nlm.nih.gov