Integrated management of plant parasitic nematodes

Inside Track
The industry loses approximately 1.6 million tons of cane annually due to nematodes. Much of this loss can be alleviated through proper management of the pest. Traditionally nematodes have always been managed with the use of nematicides. However, there are some existing farm practices that can be exploited to help manage a nematode problem without the use of a nematicide.

RV top 10 for September

Mount St. Bernard Trust 14.55
P. J. Schröder 13.57
R. H. Fortmann 13.13
L .H. Schröder Farming Trust 13.09
Overstone Farm Partnership 13.04
Ring Farming cc 13.00
R. H. Kaiser 13.55
W. R. W. Trust 12.75
Thies Trading Trust 12.74
Harden Heights 12.64
 

Industry figures for September

Malelane 13.56
Pongola 13.29
Komatipoort 13.28
Eston 12.76
Noodsberg 12.44
Umfolozi 12.26
UCL 12.25
Umzimkulu 11.88
Felixton 11.33
Maidstone 10.85
Sezela 10.70
Gledhow 10.62
Amatikulu 10.52
Darnall 10.20
Industry 12.04

Rainfall

IMG

the inside track

The industry loses approximately 1.6 million tons of cane annually due to nematodes. Much of this loss can be alleviated through proper management of the pest. Traditionally nematodes have always been managed with the use of nematicides. However, there are some existing farm practices that can be exploited to help manage a nematode problem without the use of a nematicide.

1. Green manuring

Some crops have the ability to reduce nematode numbers in the soil thus negating the need for a nematicide in the plant crop. For more information on green manuring and nematodes see September 2015 edition of THE LINK: Impact of green manures on nematode control.

2. Variety choice

Some varieties show a reduced response to a nematicide and are thus termed tolerant. Any variety rated tolerant generally does not respond to a nematicide and thus does not require one when planting or ratooning. Nematode ratings for varieties can be found in the variety information sheets. So check the nematode status of the variety that you are planting.

3. Sample for nematodes

All fields should be sampled at least once. This is to determine what nematodes you have and the exact clay percentage of your soil, in order to make an informed decision on management. Not all genera are pathogenic on cane, so if they are not present in the soil and roots, there may not be a need to apply a nematicide. Conversely, if these genera are present, you may still need to apply a nematicide even in a slightly higher clay percentage soil (a soil in which you would not normally apply a nematicide). To confirm the need to apply or not apply a nematicide, you can you use test strips. Treat a few lines and leave a few untreated next to it. If you see a visual response in 6 weeks, then apply to the rest of the field.

By exploiting existing practices and making and informed on nematode management, nematodes can be managed in an environmentally sustainable, cost effective manner.(P. Ramouthar)

Brief:

  • Cane growers are request to email Bruno Eggers the percentage of farm area that will be replanted this season.

Bark

The season has not started very well. Firstly, due to the dry weather conditions very few growers are able to strip and secondly we are involved in strike action. At this stage we are unsure how long it is expected last, but we will keep you all up dated.

Once everything is back to normal we hope to have received some rain and our season can get going. We are still planning to process 60’000t for the season; therefore due to the late start we can expect to be going into late May. Please plan harvesting accordingly.

UCL Share Trading

Current offers to sell:
  Qty  Value
Feb ’12 27’650 R1.50
Feb ’12 500’000 R1.50
Jun ’12  99’800  R1.50
Oct ’12 35’804 R1.50
Nov ’12 13’406   R1.50
Jan ’13 22’500 R1.50
Jul ’13 2’744’271 R1.20
Mar’ 14  466’462 R1.50
Aug '15 22'500 R1.00
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