Cabbage worm and cabbage pest there management

Now common throughout the India, important cabbage worm does a great damage to brassica and other cabbage family crops in fields and garden where it gains a foothold. Although the larvae of this green pest more sluggishly. It is extremely destructive, especially later in the growing season where population can build significantly.

Here is a brief overview of the main pest cole crops include cabbage, cauliflower, knol-khol, broccoli, and brussels sprouts.

  Control method Cabbage worms

cabbage  worm
   cabbage worm

 

1.Cabbage butterfly

The butterfly is a large, yellowish white insect with a pair of black dots on each forewing. The caterpillars are tiny with body covered with short hairs. The caterpillars feed voraciously on the  leaves, shoots and pods and when they are grown up they disperse themselves to various parts of the plants. They start feeding from the margin of leaf and proceed to the centre. The whole leaf and plant may be stripped resulting in poor yield and quality of produce.

Management

i) Hand pick the caterpillars and destroy them in kerosenised water.

ii) Spray 1.0 litre of malathion 50EC or 925 ml of endosulfan 35 EC in 200-250 litres of water/ha. Repeat spraying at 10 days intervals if necessary. Do not spray the crop at least one week before the harvest. Repeat spraying at 10-day intervals if necessary. Do not spray the crop at least one week before the harvest.

2. Diamondback moth cabbage worm

The moth is greyish brown with narrow wings and pale white marking along the back of the forewings which form a diamond shaped pattern when folded. The hide wings have a fringe of long hairs. The caterpillars bite holes by feeding on the leaves giving a short-hole effect all over the leaves. In dry season they become abundant enough to cause appreciable damage to the young cabbage. The pest causes serious damage to cauliflower, radish and knol-khol.

Management

i) Remove and destroy all the remnants, stubble, debris, etc after harvest of the crop and plough the fields.

ii) Tomato, when intercropped with cabbage, inhibits or reducks egg laying by diamonback moth.

iii) Indian mustard, which attracts 80-90% diamondback moths for colonisation can be used as a trap crop.

iv) Spray 300-625 ml of diazinon 20EC or 500-1000ml of quinalphos 35EC  or endosulfan 35EC or trichlorphon 50EC or 250ml of fevalerate 20EC using 200-250 litres of water/ha. Repeat spray after 10 days, if necessary.

3. Cabbage worm flea beetle

The body of the cabbage worm beetle is elongated, narrow anteriorly and gradually broaden distally and round at the apex. The beetle is bluish black in colour with enlarged hind femer. The ventral side is piceous. The larvae feed on the tender roots of the plants. The adults beetle makes hole on the leaves, buds and stems which cause them unfit for human consumption. In May and June the beetles migrate to radish plots and cause severe loss if not controlled.

Management

i) Remove damaged plants.

ii) Spray 2.0 litres of endosulfan 35EC or 2.5 kg of carbaryl 50WP in 250 litres of water/ha.

4. Cabbage aphid

The cabbage worm aphids are small, yellowish green and soft insects and usually 2.5 to 3mm long. Both the nymphs and adults suck the sap from the tender part of the plants. Incabbage the aphids enter the inner leaves of the head and in cauliflower all the inner space in the head is filed by the aphids, thus marking the vegetables unmarketable. Turnip and radish are also affected. The aphids excrete hone dew on which shooty mould grows covering the dorsal leaf surface.

Management

Spray 625-1250 ml of malathion 50EC or 250-875 ml of endosulfan 35EC in 200-250 litres of water/ha. Do not harvest fruit till 3 weeks from the date of application.

cabbage  pest
    cabbage pest

5. Painted bug

The bugs are small, black in colour. They have red and yellow markings on the whole body. This is a sporadic pest. The numphs and adults suck sap from the leaves and tender shoots. The affected parts turn yellow due to sucking of sap. The yield is adversely affected.

Management

i) Remove and destroy all the remnants, stubble, debris, etc after harvest of the crop and plough the fields.

ii) Tomato, when intercropped with cabbage, inhibits or reducks egg laying by diamonback moth.

iii) Indian mustard, which attracts 80-90% diamondback moths for colonisation can be used as a trap crop.

iv) Spray 300-625 ml of diazinon 20EC or 500-1000ml of quinalphos 35EC  or endosulfan 35EC or trichlorphon 50EC or 250ml of fevalerate 20EC using 200-250 litres of water/ha. Repeat spray after 10 days, if necessary.

Best study Agriculture cultivation study

6. Leaf webbing caterpillar or leaf webber

The moth is small with light brownish forewings. The green caterpillars have red head and brown longitudinal stripes and rows of tubercles with short hairs on pale violaceus body. The caterpillars web up the leaves and live inside the knotted mass. They feed on the leaves and skeletonize them. Flowering and pod formation are adversely affected. It attacks cabbage, cauliflower, radish and other crucifers and the weed, Gynandropsis pentaphylla.

Management

i) Remove and destroy the webbed leaves.

ii) Dust 4% carbaryl @25kg/ha

iii) Spray 940 ml of malathion 50EC or 320 ml of dichlorous 100EC in 300litres of water/ha.

7. Cabbage borer worm

The moths are pale-yellow brown with wavy lines lines and central elliptical gray marking on the forewings. The caterpillars are pale whitish brown with black head and four logitudinal lines on the body. The caterpillars bore into the stem, stalks or leaf veins and cause damage by making the produce unfit for marketing. It attacks cabbage, cauliflower, knol-khol, beetroot and weeds. The caterpillars pupate into the burrows or leaf folds in the soil.

Management

Since the attack is mostly on young plants in the nursery and the fields, spray 250ml of endosulfan 35EC or 375 g of carbaryl 50WP in 125-150 litres of water/ha. The spray should be repeated once after 10 days.

8. Snalis and slugs cabbage worm

They cause damage by feeding on the curds of cauliflower and on the growing tips of the plants. The problem is more in sewage water irrigated areas.

Management

i) Apply baits with metaldehyde and bran (1:2 in 12 litres of water)

ii) Spray 2% alum suspension as repellent.

How to control Agriculture Pest and Disease

 

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