Boron: “Deficiency symptoms may be more common than you thought”
By Ben Funnekotter
Grower Solutions Magazine
Brassica growers often think they have a major problem with Diamond Back Moth grub damage, and end up spraying three or four times a week to try and stop their produce looking as though a hailstorm has ripped through the crop.
However, very often, this is not grub damage at all but rather the classic symptoms of Boron deficiency. Boron deficiency is particularly prevalent in the sandy soils of WA, but that does not mean the other states in Australia are exempt from such problems. The two problems look very similar at first glance, but by taking a closer look, the differences become apparent. A technical explanation of what Boron does in the plant is not necessary, suffice to say that it is taken up in the cell wall, where one of it's major functions is to strengthen the cell wall.
Growers should look closely at their crops to detect the symptoms at an early stage.
Often the symptoms of Boron deficiency occur despite high levels of Boron being present in the irrigation water. Ideally the first applications of Boron should be applied at seedling stage in the nursery, as a foliar spray. Thereafter the next application should be at transplant and again two weeks later.
Quoted from AgriSupportOnline
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