Which is the biological control of red cotton bug?

Spray phosphamidon 40 SL @ 600 ml/ha.

What is red cotton bug?

Dysdercus cingulatus is a species of true bug in the family Pyrrhocoridae, commonly known as the red cotton stainer. It is a serious pest of cotton crops, the adults and older nymphs feeding on the emerging bolls and the cotton seeds as they mature, transmitting cotton-staining fungi as they do so.

Why are red cotton bugs called red cotton stainers?

Medium to large-sized nymphs and adults feed on seeds in developing cotton bolls (Sprenkel 2000). The cotton stainer derives its name from its habit of staining cotton an indelible brownish yellow.

Which of the following statements is true about the Holometabolous insects?

Which of the following statements is true about the holometabolous insects? Sol: (a) These insects undergo complete metamorphosis.

How do you control red cotton bugs?

Spraying of Malathion 0.05% is effective to control the pest. 6. Spraying of 1-litre endosulfan 35% EC, 0.25 litre phosphamidon= 100% EC or 1-litre Fenitrothion 100% EC per hectare is very effective or reduces pest population.

Is a host plants for red cotton bug?

In November 1972, nymphs of the red cotton bug [Dysdercus cingulatus (F.)] were found feeding on the wild plants Chrozophera rottleri and Trichodesma amplexicaule in fields at Akola in the Indian State of Maharashtra.

Which is the damaging stage of red cotton bug?

Damage symptoms: The damage is caused by both nymphs and adults by sucking the sap of the plant as well as that of bolls and stain the lint. They are also, therefore, termed as cotton boll stainers.

How do cotton stainers excrete?

The urine of Dysdercus is always liquid. There is a rapid rate of excretion during the first half of the instar, but when feeding ceases there is no further micturition and urine is retained in the rectum.

How do cotton stainers reproduce?

Life cycle. Cotton stainers mate 2-6 days after their final moult and remain in copula until the first oviposition which takes place. 2-8 days later. The egg laying period lasts for 20-66 days; eggs being laid in batches of up to 100 in moist soil or plant debris, and hatching after 5-8 days.

Why are holometabolous insects so diverse?

Immature stages of holometabolous insects are very different from the mature stage. In some species the holometabolous life cycle prevents larvae from competing with adults because they inhabit different ecological niches. The morphology and behavior of each stage are adapted for different activities.