prone to infection. Symptoms spr ad from roots to co ll ar r at contact.

Transcription

1 PHYTOPHTHORA F SLOW DECLINE D BLACK PE CALICUT, 673 (H2 NATIONAL RESEARCH C

2 caused by Phytophthora capsi parts of the plant (l eaves, s prone to infection. Symptoms Soil Phase: The fu n us infe spr ad from roots to co ll ar the gro Ll nd level) of the bus It also occurs through the i root in fection starts during M soil moisture and continue high and temperature below 3 early. tages of in fe ction show intensities. In advanced. tages branches b reak off at the nod Occasionally the vine dies w yellowing. T he disease sprea r at contact. A erial Pha e: The fungu ' als brown spots (lesi ns) wh ich en

3 with pale whitish centre is also n d rop-off and thus foliar infection l of defoliation. W he n infectio n o the infected branches turn dark B ranches, beyond the point of ye llowing, defoliation and.. iltin spikcs at any poi nt causing rotting drop off. Foliar in fecti on occurs coinciding wi th heavy rainfall. Dis regions of thebushto upper parts thr SLOW DECLINE Slow decl in in fection causes v yellowing and defoliation. T his wa wilt. It is a de bilitating disease co root infection by Radopholus si incognita, two important soil nematodes. Independent infection and nematodes also might occur. from place to place. Coll ar infection (foot rot)

4 The damage to the root ca combin d with Phytophthora w resulting in varying degrees of r yellowing. Affected vines gradu productivity. T he disease affecte root system exhibit intense folia am ards with gradual depletion o with severe root in fections dry INTEGRATED DISEASE MANA PHYTOPHTHORA FOOT RO DISEASES Since P. capsici and plant s il borne and also inseparable Root infection - in majority of the cases, it is im pathogens to boost up vigour and Cultural Practices " Phyto a ni tation: Remove i long with root system from to check the population bui Drench the spot with 5 lit. of * Provid good drainage in plantation i prone for wat * Maintain legume or gra s co rainy season to reduce so foliar infection.

5 build up in the planta * Prune off tender runn shoots which are touch standard to reduce the >;< Practice minimum root system. tilla * Avoid frequent movem garden to healthy garde Replant atleast one y dead vine. Plant disea R unner shoot infection pits. Burn dry trash in 0.2% copper oxychlori Biocontrol Apply neem oil cake a vine during May-June, w both on nematodes and source as nutrient.

6 :;': Spray vines with Bord basins with 3-S Iitres (2g/1it) or 1 % bord monsoon treatment (M monsoon treatment (A tity of copper oxych canopy. Apply Bordea to check collar infect Spray the vines with Ridomil - MZ 72 WP aseof the Sl above bordeaux mixt A third round of soi chloridelbordeaux m O ctober, if north-eas 30g of phorate (Thim vine during May- Jun Augus t - Sept mber to PRECAUTIONS 1. Mild foliar yellowing is and needs a careful w and prophylactic actio 2. Presence of runner roo warning signal to not 3. T imely application of f and application at adv be ineffective. Optim place depending on the 4. Resort to foliar spray a S. Adequate soi l moisture of nematicide applicati 6. Avoid using runner sho planting materials. 7. Neem oil cake with oil be used as a soil amen cake will not be effe Publi h~d hy: K-Y. Peter. i r Text prepared by: Y.R. Sarma Printed at San Jose Proces