Broccoli

Introduction | Climatic Requirement | Soil Requirement | Varieties
Field Preparation and Sowing | Nutrient Management | Water and Irrigation | Weed Management
Disease Management | Harvesting | Post Harvesting | Miscellaneous
 
Disease Management:

Downy mildew


Broccoli does not suffer from diseases except downy mildew on leaf and head.

Control Measures:

i. Neem seed kernel 5 ml/litre spray after 25 – 30 days after transplanting.
ii. Neem oil 5 ml/litre -15 days after 1st spray of Neem seed kernel.
iii. Neem oil 5 ml/litre - 30 days after Neem seed kernel spray.

This recommendation gives good result to control the diseases.

Insect-pests:

Broccoli is infested by a number of insect pests. The main pest are as follow:

Cabbage Diamond-black Moth (Plutella xylostella L.):

The moths are small greyish brown insects with wing span of 1.6 mm. the forewings bear 3 whitish triangular spots on their posterior margins which together form a diamond pattern when the insect is at rest with wings folded along the body.






Host Plants:
Mainly cabbage, broccoli and cauliflower but can also feed on other cruciferous, solanaceous and liliaceous plants.

Damage and Symptoms of Attack:
It is a serious pest of cabbage all over the world. Inner leaves get riddled with caterpillars showing round transparent cuticular patches caused by feeding.

Control Measures:

a) Spraying of Bt product like Delfin 3G @ 1 gm/litre.
b) Spraying of neem based formulations @ 4 ml/litre gives good result.

Cabbage Butterfly (Pieris brassicae L.):

 It is a large 5.5-6.6 cm white coloured butterfly with back fore-wing-tips and two prominent black spots on the forewings of the females.







Host Plants:
It is a serious pest of cabbage, broccoli, cauliflower and knlo-khol, but can also attack turnip, radish, mustard and other cruciferous crops.

Damage and Symptoms of Attack:
Serious damage is done to the leaves. First instar caterpillars only scrape the leaf surface but later ones eat away the leaves at the margins inwards, leaving intact the major veins alone.

Control Measures:
a) Frequently monitoring of the field,
b) Collection and destruction of the caterpillars,
c) Use safer insecticides like neem or Bt products.

Cabbage Borer (Hellula undalis Fabr.):
The moth is greyish brown, forewings having wavy grey markings and hindwings are pale dusky.

Host Plants:
It is a serious pest of cabbage, cauliflower, broccoli and knol-khol, but can also attack turnip, radish, mustard and other cruciferous crops.

Damage and Symptoms of Attack:
The larva in its first two instars mines the leaf along the sides of the vein and tenders it a papery white structure with excreta filled in it. Thereafter, it nibbles the leaf and later feeds within the head. In severe attack, the plants become weak and produce deformed heads.

Control Measures:
The braconid wasp, Bracon hebetor (Hym.) parasitizes the larvae of this pest.

Physiological Disorders:

Whiptail:
Deficiency of molybdenum cause whiptail in which the lamina of the newly-formed leaves become leathery, irregular and consisting of only mid-rib.

Control Measures:
a) This can be corrected by soil application of 1-1.5 kg molybdenum before planting.
b) Foliar spray of 0.01% solution of Ammonium molybdate helps to check this disorder.

Browning Head:
It results from boron deficiency. First water-soaked areas appear on bud clusters which in turn pinkish or rusty-brown in advanced stages resulting in rotting.

Control Measures:
a) Soil application of Borax or Sodium Borate @ 20 kg/ha will prevent the disorder.

b) Foliar spray of 0.25-0.5% solution of borax is more effective than the former one, especially when the deficiency is acute. The affected portion does not recover fully but helps in appearance of new, healthy bud clusters.

Introduction | Climatic Requirement | Soil Requirement | Varieties
Field Preparation and Sowing | Nutrient Management | Water and Irrigation | Weed Management
Disease Management | Harvesting | Post Harvesting | Miscellaneous