2020 Holt peanuts – Bundaberg

Posted in PulseCheck–Coastal on Mar 30, 2020

2020 Holt peanuts on red soil – Bundaberg

Grower: Ken Bird, Department of Agriculture and Fisheries. The block being monitored is a small trial block involving soybeans for grain and green manure, peanuts, multispecies planting and bare fallow. 6 rows of each crop/treatment are planted in each block of the trial, with 4 replicate blocks in total.

Location: Bundaberg Research Facility, Kalkie Bundaberg

Area: 1.8 ha small trial plot, irrigated, black soil

Pre-planting preparation

  • Paddocks were worked with a ripper and limed with 2.5 t/ha of fine agricultural lime before spreading the fertiliser over the top and incorporating into soil to make small beds
  • Approximately 263 kg/ha of Legume Max fertiliser applied pre-planting.

Week 1

Management notes:

  • 4 February 2020 – ‘Holt’ peanuts were sown into double-row beds and inoculated with group P peanut inoculant by water injection using an electric drive precision planter.
  • Planting rate was 180 000 seeds/ha
  • Pre-emergent herbicide application of Valor with knock-down herbicide Spray.Seed were applied at label rates before plant emergence.
  • Some issues are occurring due to the large amount of rainfall in the Bundaberg region. The peanuts are struggling particularly in the low lying areas of the paddock to emerge.

Weeks 2–3

Management notes:

  • A large percentage of the peanuts have finally germinated after a week of drier weather.
  • The plants are growing well and are looking green and healthy.
  • Rapid growth is occurring as a result of the warm, humid weather and a good soil moisture profile.

Week 4

Management notes:

  • Green, healthy and growing well.
  • The rainfall events over the last week had left them somewhat swimming but the hot humid days of late have helped dry the paddock out a little bit.
  • No signs of disease or pest issues as of yet.

Week 5

Management notes:

  • Peanuts are growing well.
  • There are some flowers appearing.
  • No obvious issues with disease or pests at the stage.

First flowers emerging.

Week 6

Management notes:

  • Overall health of plants is generally good.
  • Peg development is starting to occur.
  • In previous weeks Spinnaker was applied at label rates to control weeds and the effects are now showing on susceptible weed species.
  • A few leaves were observed to have symptoms that resemble leaf spot, but this is to be confirmed. No applications of chlorothalonil have been made yet for peanut protection.
  • Amistar Xtra is proposed to be applied early next week in the peanuts, as well as dimethoate and salt to control growing numbers of jassids.
  • Moisture levels are good, there is no need for irrigation at this time.

Possible leaf disease has been observed. Diagnosis to be confirmed.

Week 7

Management notes:

  • Plants are growing vigorously with a little bit of humid weather around. For the most part they are green and healthy, there is a small amount of leaf yellowing in some areas.
  • There is a small amount of vine weeds growing in the peanut bed but the interrow is relatively clean.
  • Plants are beginning to peg down and flowers are continuing to come out.

Some vine weeds in the row.

Week 8

Management notes:

  • Warmer weather during the day is allowing peanuts to continue powering on.
  • There is a small amount of leaf yellowing occurring in some areas of the block. Initially thought to be a nutrition issue, the yellowing has been attributed to jassids.
  • Last week the crop was sprayed with Bravo Weatherstik to help prevent leaf diseases and Bacchus to control moderate populations of small heliothis.
  • Irrigation is scheduled for this week to increase soil moisture levels.

Leaf yellowing due to jassids.

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