Moong crop diseases A Lecture by Mr Allah Dad Khan

Moong crop diseases A Lecture by Mr Allah Dad Khan

1. Moong Crop Diseases A Presentation To IPM Course/FFS Participants By Mr. Allah Dad Khan Provincial Coordinator IPM KPK For MINFAL Pakistan

2. Symptoms This disease caused by the fungus,  Podosphaera fusca , is favoured by cooler growing conditions and is often widespread in late crops. Infection becomes apparent during February, and usually increases in severity during the March-April period. It can be particularly severe during the autumn period if crops are also under moisture stress. Symptoms consist of greyish -white fungal growth on the surface of leaves, stems and pods. It can cause significant yield loss if it develops before or at flowering, particularly if the crop is under moisture stress. Late infections during the pod-filling stage can cause leaf drop but do not appear to seriously affect yield. Powdery mildew

3. Symptoms While charcoal rot ( Macrophomina phaseolina ) can cause infected plants to die prematurely and may reduce yield, its biggest impact is upon the marketability of sprouting grade beans. Seed borne infection creates a soft, wet rot of the sprouts during the germination process. Many of our overseas sprouting markets now specify that the seed must be free from the presence of charcoal rot fungus, and require that seed be tested before it is offered for sale. Charcoal rot

4. Symptoms This is a bacterial infection ( Gluconobacter  spp.) that occurs following the overproduction of sugar by the floral nectaries on the mungbean plant. The condition is triggered by a combination of heat and moisture stress, and causes extensive gumming and foaming of pods during the early stages of their development. This can be followed by collapse of the stalks supporting the pods, and then pod drop. Gummy pod

5. Symptoms Is a seed-borne bacterial disease caused by Pseudomonas savastanoi pv . phaseolicola  and first recorded in Queensland in the mid-1980s. In more recent seasons halo blight has caused significant losses on the Darling Downs and has also been identified in Central Queensland. Symptoms typically develop under cool, humid conditions following rain, most notably in spring mungbean crops. Significant yield losses can result if the disease appears before flowering or during pod development Halo blight

6. Symptoms This disease is caused by  Curtobacterium flaccumfaciens  and is often present at a low level in most crops. Symptoms consist of large, irregular, dry, papery lesions on leaves that coalesce to form large brown dead areas, commonly with yellow margins around the dead leaf tissue. These areas dry out to a tan coloured patch, which may tear and fall out, giving the leaf a ragged appearance. Tan spot

7. Symptoms Tobacco streak virus (TSV) was identified in 2007 in mungbean crops in the Central Highlands region of Central Queensland, which caused a minor to severe impact on yields. Thrips are the only known vector of TSV, that is, they can transfer virus-infected pollen. Several common broadleaf weed species are hosts of TSV with parthenium weed being a widespread and key host of the virus in central Queensland. The physical damage caused by thrips feeding on the plant allow infected pollen to enter the mungbean plant where the virus multiplies. Tobacco streak virus

8. Symptoms The disease starts as small yellow specks along the veinlets and in severe form covers the entire lamina. Whitefly ( Bemisia tabaci ) transmits this geminivirus in the persistent (circulative) manner. The host range is confined mostly to members of the  Leguminosae family.   Mung Bean Yellow Mosaic