Cotton/Narma is attacked by a large number of insect-pests and diseaeses due to which its quality and production is severely affected. Dhanuka Group offers eco-friendly products for farmers for gettinghealthy crop, high production and profitability.
Field Preparation, Use of Fertilizers and Dhanzyme-G :The field should be properly tilled and free from clods and plant residues. Apply recommended dose of fertilizers based on soil test results.
Dhanzyme-G,which is a biologically derived organic manure, should be used at the time of sowing at the rate of 8.0 kg/acre for achieving healthy crop stand, good quality of produce and maximum yields. Second application of Dhanzyme Granules should be undertaken 45-60 days after first application and ensure that sufficient moisture is present in the field at the time of application.
Selection of a suitable variety and seed treatment: Select the seed and variety for sowing as per recommendations of the State Agricultural University or State Department of Agriculture. Treat the seeds before sowing with Vitavax Power @ 2.0 g/kg seed to protect against seed and soil borne diseases.
Weed Control : At the initial stages of cotton crop, different broad and narrow leaf weeds compete with the main crop for essential nutrients, space and water inhibiting growth,and reduction in yield. Therefore, it is essential to control these weeds at primary stage. Spray Dhanutop @ 1.0 litre/acre prior to germination of weeds and crop using Flood Jet or Flat Fannozzle within 2-3 days after sowing the crop, ensuring that there is sufficient moisture in soil at the time of spray of Dhanutop.
For the control of germinated narrow leaf weeds, spray Targa Super @ 300-400 ml/acre in standing crop at 2 leaf stage to flowering stage of narrow leaf weeds. Though the weeds turn purple/brown after 5-7 days of spray, yet protection starts immediately, as weeds food supply gets blocked soon after Targa Super application.
Nutrient Management :Severalfactors including rainfall and temperature; soil factors – soil type, depth, pH, EC, Ca CO3 content and organic matter and crop factors, viz. genotype and duration, determine nutrient requirements of cotton.The fertilizer recommendations and their method of application are available for different agro-climatic zones,therefore it is advisable to adopt the recommendations of the State Agricultural University/ Department of Agricultre.However, it is recommended to spray scientific combination of N, P, K which promotes cell division, rapid growth,stimulates blooming, enhances bud set, improves lint texture and quality.
Dhanzyme Gold: Dhanzyme Gold liquid is biologically derived from sea-weed and is a plant growth booster. Application of Dhanzyme gold liquid @ 200 ml/acre at the time of flowering, induces flower initiation, improves boll settingand ensures high quality cotton. It also helps in uptake of those available plant nutrients and trace elements which are usually not available to plants.
Subsequent spray of Dhanzyme Gold liquid may be undertaken after 20-25 days after first spray.
Control of Insect Pests and Diseases
American Boll Worm (Helicoverpaarmigera):It is a serious pest of non-Bt cotton. The larvae are of cream/ yellow/ green or black in colour. Larvae bore intobolls usually with head thrust inside bolls and the part of the body kept outside and feed on internal contents. The larva consumes internal matter and holes can be seen on squares.
For effective control of all stages of American Boll Worm, use the world famous, triple action new generation insecticide,Dhawa Gold @ 130 ml/acre atthe start of infestation of insect pest.
Tobacco Caterpillar (Spodopteralitura): The young caterpillars feed gregariously by scraping chlorophyll, making lamina membranous. The grown-up caterpillar devour leaves, leaving only veins and mid-ribs. For effective control of caterpillars, spray EM-1 @ 100g/acre.
Poison Bait: The insect can also be controlled by applying Poison Bait. Take 5 litresof water and boil it. While boiling water add 2 kg jaggery and mix it properly. After cooling add 400 g Dunet SP and mix it properly after wearing hand gloves. This mixture should be spread on 10-15 kg of husk/straw placed over a plastic sheet. Broadcast whole quantity of poison bait in the evening time in an acre in standing crop.
Spotted Boll Worm (EariasVitella and E.insulana):Caterpillars bore and enter into growing parts, buds, flowers and bolls. The affected shoots wilt and die and fruiting bodies usually shed. After square formation, larva infests squares, flowers locules and bolls. Entrance hole is plugged withexcreta.
Pink BollWorm (Pectinophoragossypiella):Pinkish caterpillars bore into the bolls and feed within and pupate therein. Immature bolls are shed whereas the mature ones don’t open fully. The losses are directly related to the percentage of bolls infested and numbers of larvae present per boll.
For control of Spotted and Pink Boll Worm, spray Markar @ 400 ml/acre or EM-1 @ 100 g/acre.
Jassids (Amrascabigutullabigtulla):Jassids lay eggs into leaf veins. Nymphs and adults suck cell sap from under side of leaves and release toxins resulting into leaf curling, yellowing, and reddening of lamina, initiating from margins and ultimately resulting into Hopper Burn. If infestation is not checked at the initial stage, leaves dry up and fall.
For control of Jassids, spray Markar @ 400 ml/acre or Media SL @ 80-100 ml/acre.
Thrips (Thripstabaci): Yellow and brown coloured nymphs and adults suck the sap from leaves. Both nymphs and adults lacerate leaf tissuesand imbibe the oozing sap. Affected leaves lose the lustre, appear sick and turn brown near the veins.
For control of thrips, spray Aaatank @ 300 ml/acre or Dhanpreet @ 80-100 g/acre or Media SL @ 80-100 ml/acre.
White Fly (Bemisiatabaci):White flies nymphs and adults suck the sap from the leaves. The affected leaves curl and dry up, leading to stunted growth. The flies also act as a carrier of leaf curl virus disease. It also transmits leaf cult virus. Severe infestation at boll bursting makes the lint sticky due to deposition of honeydew.
For control of whitefly, spray Markar @ 400 ml/acre or Dhanpreet @ 80-100 g/acre.
Mites: Both nymphs and adults of different kind of mites suck the sap from the under surface of leaves. The lamina of infested leaves and on the portion around mid rib, yellow spots appear which lateron are converted into red spots. Leaves lateron become hard, crisp and finally drop. The yield is adversely affected. Bt-cotton varieties have been found to be susceptible to mite attack.For control of mites, sprayOmite @ 300 ml/acre.
Note: Spray of Omite on cotton/ Bt- cotton be undertaken only after 30 days of sowing
Major Diseases of Cotton:Several pathogens (fungi and bacteria) causing various types of diseases, like Anthracnose, Alternaria leaf spots, Cercospora leaf spots, Bacterial Blight etc. also attack cotton crop at the active vegetative growth and boll formation stages resulting into severe yield losses. Once the disease sets in, it becomes very difficult to control. Therefore, it is always advisable to have control measures as soon as the initial symptoms of these diseases appear.
For the control of above diseases, spray Kasu-B @ 400 ml/acre + Dhanucop @ 300 g/acre.
Root Rot (Rhizoctoniabataticola): First and most prominent symptom of the disease is sudden and complete wilting of the plans. Every leaf from top to bottom drops down and plant is killed within a day. The bark of roots of affected plants are brokendown into shreds.
To check the infestation, treat the seed with Vitavax Power @ 2.0 g/kg seed before sowing. Instanding crop, drenching of plants with Sheathmar @ 400 ml/acre is recommended for effective control of disease infestation.