Pectinophora gossypiella · bollworm
→ Boll formation & development (81–120 DAS)
GerminationVegetativeSquare formationFloweringBoll formation & developmentMaturity / boll opening
Open sandbox · no login
Experiment Playground
The full Cotton Pest DSS rule base, exposed. Change any field value or any coefficient in the equation, generate a result, and see the risk tier and the NCIPM/CIBRC pesticide recommendation it produces — with every step of the arithmetic shown.
Blank → DAS × daily GDD
Published: 10 % infested bolls
RULE CS-1/CS-2
ETL in force: ≥10% infested bolls (master sheet states 5–15% boll damage) [MS] rows 9–10
Result
HIGHPink Bollworm
82%Risk_final · Boll formation & development · 95 DAS
CLS-1 — apply recommended pesticide within 24–48 hrs.
Derivation
Equation trace
Risk_base = 0.40·Ws + 0.44·Fp + 0.16·Cs= 0.40×0.850 + 0.44×0.900 + 0.16×0.90= 0.880Basis: observation — a scouting count exists, so the published 40:44:16 composite applies.
- OFF-SEA1 — month 8 sits outside the Oct–Dec window and its shoulder: −0.06
Risk_final = CLIP(…, 0, 1) = 0.820 → HIGHRULE WS-1 / WS-2
Ws = 0.850Weather suitability
| Parameter | Value | Band | Range | Score |
|---|---|---|---|---|
| Tmax (°C) | 35 | high | ≥ 34 | 9 |
| Tmin (°C) | 23 | high | ≥ 22 | 9 |
| RH (%) | 72 | high | ≥ 70 | 9 |
| GDD (°C cumulative) | 1273 | high | ≥ 1100 | 9 |
| DAS | 95 | high | ≥ 90 | 9 |
| Rainfall (mm/week) | 30 | moderate | 10 – 50 | 5.5 |
| Wind speed (km/h) | 5 | high | < 6 | 9 |
| Σ / 7 / 10 | 0.850 | |||
RULE FP-1/2 · CS-1/2
Field pressure & stage susceptibility
Observed count9
ETL in force10 % infested bolls
Fp raw (uncapped)0.900
Fp (capped at 1)0.900
Cs labelH
Cs value0.90
Recommendation
chemicalControl action
Quinalphos 20% AForganophosphate · IRAC 1B
Dose1750–2500 ml/ha
Dilution750–1000 L/ha
Spectrumbroad
Alternatives (rotation candidates)
| Product | MoA | Dose | Dilution |
|---|---|---|---|
| Thiodicarb 75% WP | carbamate | 1000 g/ha | 500 L/ha |
| Chlorpyrifos 50% + Cypermethrin 5% EC | organophosphate | 1000 ml/ha | 500–1000 L/ha |
Organic / biological options
| Product | Dose | Dilution |
|---|---|---|
| Azadirachtin 0.15% W/W Neem Seed Kernel Based EC (NSKE 5%) | 2500–5000 ml/ha | 500–1000 L water/ha |
| Azadirachtin 0.03% (300 ppm) Neem Oil Based WSP | 2500–5000 ml/ha | 500–1000 L water/ha |
| Bacillus thuringiensis var. kurstaki 5% WP | 750–1000 g/ha | 500–1000 L water/ha |
- RX-PBW1: before 120 DAS use the Thiodicarb/Chlorpyrifos class, not pyrethroids.
- [MS] chemical recommendation at this stage: Synthetic pyrethroids (after 120 DAS).
Excluded candidates
- Cypermethrin 10% EC — RX-PBW1 — synthetic pyrethroids only after 120 DAS
- Fenpropathrin 30% EC — RX-PBW1 — synthetic pyrethroids only after 120 DAS
Doses are transcribed from NCIPM Annexure-IX (CIBRC 2013). Verify against the current product label and local recommendation before any field use.
NCIPM reference
ETL, recording & stage IPM
Canonical ETL: More than 8 moths/trap per night for 3 consecutive nights or more than 10% infested flowers or bolls with live larvae [ETL] p.25 item 8
Monitoring at this stage: Destructive boll sampling (100/120/135 DAS, 20 green bolls)
Organic practice: Sanitation, destroy infested bolls
Peak flowering & fruiting stage (80–120 days) — stage-wise IPM
Whitefly
- Use yellow sticky trap for monitoring
- Spray recommended insecticides
Bollworms
- Use pheromone traps @ 5 traps/ha
- Physical collection & destruction of grown-up larvae
- Use HaNPV 0.43% AS @ 2700 ml/ha
- Removal of terminals (topping) at times of high Helicoverpa oviposition
- Follow IRM strategies
Spodoptera
- Pheromone traps @ 5 traps/ha
- Sow castor seeds at field borders as indicator cum trap crop
- Hand collection & destruction of egg masses and early instar gregarious larvae
- Spray recommended insecticides
Diagnostic symptoms
- Pink larvae inside developing bolls with inter-locular movement
- Rosetted bloom (rosette flowers)
- Premature boll opening, seed damage and lint discolouration
Experiment log
0 logged runs
Held in this browser tab only — nothing is saved to a server.
Change any input or coefficient above, then press Run & log experiment to capture the field values and the result side by side.