Identify and treat common indoor garden pests and diseases. Learn IPM rotation schedules, biological controls, and prevention strategies.
Prevention is key: clean environment, proper airflow, quarantine new plants. Common pests: Spider mites (tiny dots under leaves, webbing), Fungus gnats (small flies in soil, larvae eat roots), Thrips (silver streaks on leaves), Aphids (clusters on stems/undersides). Organic solutions: Neem oil, insecticidal soap, BT (for caterpillars/gnats), beneficial insects (ladybugs, predatory mites).
For powdery mildew: improve airflow, lower humidity, use potassium bicarbonate sprays. IPM (Integrated Pest Management) = prevention + monitoring + targeted treatment.
[{"topic":"Aphid Identification and Species Differentiation","category":"Pest Identification","content":"Green peach aphids (Myzus persicae) are 1.2-2.1mm long, pear-shaped, and range from pale green to pink or red. They cluster on new growth, stem tips, and undersides of young leaves. Root aphids (Phylloxera species) are 1-3mm, waxy white to gray, and infest root systems and growing media. Wingless forms dominate early infestations - 95% of population initially wingless. Winged forms (alates) appear when colonies exceed 40-50 individuals per plant or under stress conditions. Look for cornicles (tail pipes) on green peach aphids - small tubes projecting from abdomen. Root aphids lack prominent cornicles and have more compact, waxy bodies. Honeydew appears as sticky, shiny droplets on leaves below infestations, leading to black sooty mold (Capnodium species) within 48-72 hours in humid conditions above 60% RH.","key_values":["Green peach aphids: 1.2-2.1mm, pale green to pink","Root aphids: 1-3mm, waxy white to gray","95% wingless forms initially","Winged forms appear at 40-50+ individuals per plant","Honeydew leads to sooty mold in 48-72 hours at >60% RH"],"experience_level":"beginner"},{"topic":"Reproduction Rates and Population Dynamics","category":"Biology and Life Cycle","content":"Aphids reproduce asexually through parthenogenesis at alarming rates. Green peach aphids complete development in 7-10 days at 75-80°F, producing 40-100 nymphs per female over 20-40 day lifespan. Population can increase 10-12 fold weekly under optimal conditions (75-85°F, 50-70% RH). Each female produces 4-12 nymphs per day during peak reproduction. Root aphids reproduce slower - 10-14 days to maturity, 20-60 offspring per female, but are protected by growing media. Temperature threshold: reproduction stops below 50°F, peaks at 75-85°F, declines above 95°F. At 80°F, a single aphid can theoretically produce 1.5 billion descendants in 30 days through exponential asexual reproduction.","key_values":["Development: 7-10 days at 75-80°F","40-100 nymphs per female lifetime","10-12 fold weekly population increase","4-12 nymphs per day during peak","1.5 billion theoretical descendants in 30 days at 80°F"],"experience_level":"intermediate"},{"topic":"Insecticidal Soap Treatment Protocols","category":"Chemical Control","content":"Safer Brand Insecticidal Soap concentrate: mix 2.5oz per gallon (1:51 ratio) for heavy infestations, 1.25oz per gallon for maintenance. Dr. Bronner's Pure Castile Soap: 1-2 tablespoons per quart water (avoid moisturizing varieties). Spray every 3-5 days, minimum 3 applications. Apply during lights-off period or 2 hours before lights on to prevent phototoxicity. Complete coverage essential - target undersides of leaves where 80% of aphids hide. Spray pressure 30-45 PSI, fine mist droplet size 200-400 microns. Water temperature 70-75°F improves efficacy. pH 6.0-7.0 optimal. Add 0.1% spreader-sticker (Coco-Wet) for better coverage. Rinse plants with clean water 4-6 hours after application to prevent soap residue buildup. Rotate with other treatments to prevent resistance.","key_values":["Safer Brand: 2.5oz per gallon for heavy infestations","Dr. Bronner's: 1-2 tablespoons per quart","Spray every 3-5 days, minimum 3 applications","Apply during lights-off or 2 hours before lights on","30-45 PSI pressure, 200-400 micron droplets"],"experience_level":"beginner"},{"topic":"Neem Oil and Pyrethrin Applications","category":"Chemical Control","content":"Neem oil (azadirachtin 0.5-3%): Garden Safe Neem Oil Extract at 2-4 tablespoons per gallon water. Bonide Captain Jack's Neem Oil ready-to-use for small operations. Apply every 7-14 days as systemic treatment. Works slowly - 3-7 days to show effects, disrupts molting and reproduction. Pyrethrin (natural): PyGanic 1.4% EC at 1-2oz per gallon for knockdown effect within 1-4 hours. Safer Brand Pyrethrin concentrate: 2.4-4.8oz per gallon. Combine with PBO (piperonyl butoxide) synergist for 3-5x increased efficacy. Apply late evening as pyrethrins degrade rapidly in light (4-6 hour half-life UV). Tank mix compatibility: neem + insecticidal soap compatible, pyrethrin + neem incompatible (antagonistic).
Maximum 2 pyrethrin applications per week, 4 per month.","key_values":["Neem oil: 2-4 tablespoons per gallon every 7-14 days","PyGanic 1.4%: 1-2oz per gallon","Pyrethrin knockdown: 1-4 hours","UV degradation: 4-6 hour half-life","Maximum 2 pyrethrin applications per week"],"experience_level":"intermediate"},{"topic":"Beneficial Insect Programs","category":"Biological Control","content":"Aphidius colemani wasps: release 0.5-1.0 per square foot or 2-5 per plant weekly for 3-4 weeks. Optimal conditions 70-80°F, 50-70% RH. Banker plants (barley with bird cherry-oat aphids) provide continuous wasp reproduction. Green lacewing larvae (Chrysoperla rufilabris): 2-5 per square foot, consume 200-300 aphids during 2-3 week larval stage. Ladybugs (Hippodamia convergens): release 1,500-4,500 per 1,000 sq ft, though 70-80% may disperse within 48 hours without adequate food. Predatory midges (Aphidoletes aphidimyza): release 1-3 per square foot, larvae consume 3-50 aphids each over 7-10 days. Stop insecticide applications 7-14 days before beneficial releases. Maintain 16+ hour photoperiod to prevent diapause in beneficial insects.","key_values":["Aphidius colemani: 0.5-1.0 per sq ft weekly for 3-4 weeks","Lacewing larvae consume 200-300 aphids in 2-3 weeks","Ladybugs: 1,500-4,500 per 1,000 sq ft","70-80% ladybug dispersal within 48 hours","Stop insecticides 7-14 days before beneficial release"],"experience_level":"advanced"},{"topic":"Root Aphid Treatment Protocols","category":"Specialized Control","content":"Root aphids require intensive treatment due to protection from growing media. Botanigard ES (Beauveria bassiana strain GHA): drench at 0.5-2.0oz per gallon, apply to saturated media. Repeat every 7-14 days for 4-6 applications. Beneficial nematodes Steinernema feltiae: apply 50-250 million per 1,000 sq ft in growing media. Soil temperature 55-85°F critical for nematode survival. Apply in evening, maintain media moisture for 14 days post-application. Hydrogen peroxide 3% solution: 1 part H2O2 to 4 parts water as media drench, disrupts egg masses but may damage roots. Predatory mite Stratiolaelaps scimitus: 10,000-25,000 per 1,000 sq ft in media, establish before infestation. Root zone treatments take 14-21 days to show effects vs 3-7 days for foliar aphids. Consider replacing heavily infested plants/media if >50 aphids per gram of root mass.","key_values":["Botanigard ES: 0.5-2.0oz per gallon, repeat every 7-14 days","Steinernema feltiae: 50-250 million per 1,000 sq ft","Soil temperature 55-85°F for nematode survival","Root treatments take 14-21 days vs 3-7 days foliar","Replace if >50 aphids per gram root mass"],"experience_level":"advanced"},{"topic":"Clone Inspection and Quarantine Protocols","category":"Prevention","content":"Establish 14-21 day quarantine room minimum 50 feet from main growing areas. Inspect 100% of incoming clones using 10x hand lens or 30-60x jeweler's loupe. Check undersides of all leaves, stem joints, and growing tips. Root inspection requires removing 25-50% of media to examine root mass and check for white/gray clusters. Quarantine environmental conditions: 65-70°F, 45-55% RH, 18/6 light cycle to stress-test plants and reveal hidden infestations. Weekly alcohol wipe-down of inspection tools (70% isopropyl). Sticky traps (yellow 10x10 inch) at 1 per 100 sq ft to monitor for winged aphids. Document source facility, inspection date, and inspector ID for traceability. Reject any clone showing 5+ aphids or any root aphid presence. Pre-emptive beneficial release: Aphidius colemani at 0.25 per sq ft during quarantine period.","key_values":["14-21 day quarantine minimum 50 feet from main facility","100% clone inspection with 10x-60x magnification","Remove 25-50% media for root inspection","65-70°F, 45-55% RH quarantine conditions","Reject clones with 5+ aphids or any root aphids"],"experience_level":"intermediate"},{"topic":"Spray Timing and Vegetative Treatment Windows","category":"Application Timing","content":"Apply ALL aphid treatments exclusively during vegetative growth - NEVER during flowering due to residue concerns and reduced plant tolerance. Optimal spray timing: 2-4 hours after lights on when stomata are open and temperature is 70-78°F. Avoid spraying within 4 hours of lights off to prevent excess humidity overnight. Weekly preventive sprays during weeks 1-4 of vegetative growth when plants are most susceptible. Stop all foliar applications minimum 7-14 days before flower initiation. Exception: root drenches can continue into early flower (first 2 weeks) if root aphid pressure severe. Environmental conditions during spray: <75°F, 40-60% RH, air circulation on but reduced speed (50-75% normal). Allow 4-6 hours drying time before returning to normal environmental conditions. Document all applications: date, time, product, concentration, coverage area, environmental conditions, and efficacy assessment 72 hours post-treatment.","key_values":["Vegetative treatment ONLY - never during flowering","Spray 2-4 hours after lights on at 70-78°F","Stop foliar applications 7-14 days before flowering","Environmental conditions: <75°F, 40-60% RH during spray","Allow 4-6 hours drying time before normal conditions"],"experience_level":"beginner"}]
[{"topic":"Visual Identification and Early Detection","category":"Disease Recognition","content":"Botrytis cinerea appears as gray-brown fuzzy mold on flower surfaces, initially as small brown spots on bud leaves or sugar leaves. Early stage: yellowing or browning of individual leaves around bud sites, often mistaken for nutrient burn. Mid-stage: gray-white cottony growth appears, typically starting in densest bud areas where humidity accumulates. Late stage: entire bud sections turn brown/black with visible gray spores. Use 30x jeweler's loupe or 60x Carson MicroBrite for daily inspections. Check inner bud structure by gently spreading outer leaves - healthy tissue should be green/white, infected tissue appears tan/brown. Infected areas feel mushy compared to firm healthy buds. Spore release creates dusty appearance when disturbed. Morning inspections critical as overnight humidity creates ideal conditions for visible growth.","key_values":["Gray fuzzy mold growth","Brown/tan discoloration in bud centers","Mushy texture vs firm healthy tissue","Dusty spore release when disturbed"],"experience_level":"beginner"},{"topic":"Environmental Causes and Risk Factors","category":"Root Cause Analysis","content":"Relative humidity above 55% combined with poor air circulation creates ideal conditions for Botrytis spore germination and growth. Critical risk factors: RH above 60% for 4+ hours triggers spore activation, temperatures between 65-75°F optimal for growth, stagnant air pockets around dense canopies. Dense bud structure varieties (indica-dominant, Purple strains, OG genetics) show 3x higher infection rates. Watering practices: overhead watering increases risk 400%, water droplets on leaves/buds create microenvironments of 85%+ humidity. Poor ventilation creates temperature gradients - warm air rises, cools against canopy creating condensation. Overcrowded canopies reduce air penetration by 70-80%. Late flower stage (weeks 6-9) most vulnerable due to dense trichome development trapping moisture. Outdoor cultivation: morning dew, rain events, fog create perfect storm conditions.","key_values":["RH above 55% triggers risk","4+ hour high humidity exposure critical","Dense genetics 3x more susceptible","Overhead watering increases risk 400%"],"experience_level":"intermediate"},{"topic":"Dehumidifier Sizing and Selection","category":"Environmental Control Equipment","content":"Calculate dehumidifier capacity using room volume × air changes per hour × humidity differential. For 8x8x8 grow room (512 cubic feet): minimum 50-pint capacity for moderate humidity, 70-pint for high humidity climates. Recommended units: Quest Dual 155 (155 pints/day) for commercial operations, Aprilaire E080 (80 pints/day) for 10x10 rooms, Santa Fe Compact (70 pints/day) for 8x8 spaces. Install multiple smaller units rather than single large unit for better distribution. Position dehumidifiers to create air circulation - intake should face plant canopy, exhaust toward extraction fans. Drain setup critical: continuous drain preferred over reservoir, use 3/4 inch condensate pump (Little Giant VCMA-20ULS) for units below drain level. Temperature considerations: refrigerant-based units lose 50% efficiency below 65°F, use desiccant units (Ebac DD400) for cool conditions. Energy consumption: 6-8 watts per pint of capacity, factor into electrical load calculations.","key_values":["70 pint minimum for 10x10 room","Quest Dual 155 for commercial use","Multiple smaller units better than single large","6-8 watts per pint energy consumption"],"experience_level":"advanced"},{"topic":"Air Circulation System Design","category":"Environmental Control Equipment","content":"Design air circulation for complete air exchange every 1-3 minutes throughout canopy. Calculate CFM requirements: Room Volume ÷ Exchange Rate (1-3 minutes) = minimum CFM. 8x8x8 room needs minimum 170-512 CFM circulation fans. Layer air movement: Oscillating fans (6-12 inch) for canopy level, circulation fans (4-6 inch) for understory, exhaust fans for room-level exchange. Recommended circulation fans: Hurricane Classic 16-inch (3,240 CFM) for large rooms, Vornado 630 for 4x4 spaces, Secret Jardin Monkey Fan 16W for tent applications. Position fans to avoid direct airflow on buds - indirect circulation prevents wind burn while maintaining air movement. Create slight negative pressure: exhaust CFM should be 10-15% higher than intake CFM. Install fans at multiple heights: upper canopy, mid-level, floor level to eliminate dead air zones. Use variable speed controllers (Phresh Controls Fan Speed Controller) to adjust airflow through growth stages.","key_values":["1-3 minute complete air exchange","170-512 CFM for 8x8 room","Indirect airflow prevents wind burn","10-15% negative pressure differential"],"experience_level":"advanced"},{"topic":"Strategic Defoliation Protocol","category":"Cultural Prevention Methods","content":"Begin selective defoliation at flower initiation (week 1-2 flower cycle). Remove large fan leaves blocking airflow to bud sites - prioritize leaves covering multiple bud clusters.
Week 3-4 flower: remove yellowing fan leaves and inner branching that won't receive adequate light. Critical defoliation period weeks 4-6: remove all fan leaves touching other leaves or creating humidity pockets. Focus on lower canopy leaves that touch growing medium or neighboring plants. Technique: use sterilized scissors (rubbing alcohol between cuts), cut leaf stems 1/4 inch from main stem to prevent infection entry points. Progressive approach: remove 20-30% of fan leaves per session, wait 3-5 days between sessions to avoid plant shock. Late flower defoliation (weeks 6+): minimal removal, focus only on leaves showing decay or creating air circulation problems. Post-defoliation care: increase air circulation for 24-48 hours, monitor for stress signs (wilting, drooping).","key_values":["20-30% fan leaves per session","3-5 day intervals between defoliation","Sterilize scissors between cuts","Focus on humidity pocket elimination"],"experience_level":"intermediate"},{"topic":"Daily Inspection and Monitoring Protocol","category":"Detection and Monitoring","content":"Establish morning inspection routine between 6-8 AM when overnight humidity effects are most visible. Use systematic approach: start from one corner, inspect every plant following same pattern daily. Visual inspection tools: 30x jeweler's loupe minimum, 60x Carson MicroBrite with LED preferred, smartphone macro lens for documentation. Check sequence: outer bud leaves first, then gently separate to inspect inner bud structure. Record environmental data: RH%, temperature, VPD using Pulse Pro monitoring system or similar. Photograph suspicious areas with date/time stamps for progression tracking. Physical inspection: gently squeeze buds checking for soft/mushy areas, smell test for musty odors indicating early infection. Problem areas: dense bud clusters, areas with poor air circulation, plants near walls or corners, lower bud sites with high humidity. Create inspection log: plant ID, location, symptoms observed, actions taken, environmental conditions. Late flower intensify to twice daily - morning and evening inspections.","key_values":["6-8 AM daily inspection window","30x loupe minimum magnification","Twice daily inspection in late flower","Document with photos and environmental data"],"experience_level":"beginner"},{"topic":"Infection Removal and Containment Protocol","category":"Treatment and Remediation","content":"Immediate action protocol upon detection: Stop all air circulation fans to prevent spore distribution, gather sterilized tools (scissors, gloves, collection bags), prepare 70% isopropyl alcohol for tool sterilization. Removal technique: Cut infected material 2-3 inches below visible infection into healthy tissue, make clean cuts at 45-degree angle, sterilize tools between each cut. Double-bag infected material in sealed plastic bags, remove from growing area immediately, dispose as contaminated waste - never compost. Quarantine protocol: inspect all plants within 3-foot radius of infected plant, increase monitoring frequency to twice daily for 7-10 days. Environmental response: immediately reduce humidity to 40-45% RH, increase air circulation by 25-50%, extend photoperiod lighting by 1-2 hours to accelerate drying. Tool sterilization: 70% isopropyl alcohol contact time minimum 30 seconds, UV sterilization lamp 254nm for 10-15 minutes between uses. Post-removal monitoring: mark removal sites, check daily for re-infection, document plant recovery progress. Consider harvest timing acceleration if multiple infections occur.","key_values":["Cut 2-3 inches below visible infection","Double-bag contaminated material","70% alcohol 30-second contact time","Reduce RH to 40-45% immediately"],"experience_level":"intermediate"},{"topic":"Critical Late Flower Environmental Parameters","category":"Environmental Control","content":"Weeks 6-9 flower cycle require strictest environmental control: maintain RH 40-50% maximum, never exceed 55% for any duration. Temperature range 65-72°F day, 60-65°F night - avoid temperature swings greater than 10°F. VPD (Vapor Pressure Deficit) target 1.2-1.6 kPa for optimal transpiration and humidity control. Monitor using calibrated instruments: Pulse Pro monitors ($200), Trolmaster Aqua-X system ($400), or minimum digital hygro-thermometer with data logging. Air circulation requirements increase 50% in late flower: calculate 1 CFM per square foot minimum canopy circulation. Dehumidifier operation: continuous operation in final 3 weeks, use timer controls to prevent over-drying (30 minutes on/10 minutes off cycles). Irrigation adjustments: reduce watering frequency by 25-30%, focus on early morning watering to allow full dry-down cycle. Emergency protocols: RH exceeds 60% for any period triggers immediate action - increase exhaust, activate backup dehumidifiers, delay watering schedule. Night cycle critical: use infrared thermometer to check canopy temperature, ensure adequate air movement during dark periods.","key_values":["40-50% RH maximum weeks 6-9","VPD target 1.2-1.6 kPa","1 CFM per square foot circulation","30 minutes on/10 minutes off dehumidifier cycles"],"experience_level":"advanced"}]
Spider mites, fungus gnats, thrips, and aphids are the most common. Spider mites cause stippling on leaves, fungus gnats are tiny flies around soil, thrips leave silver streaks, and aphids cluster on new growth.
Integrated Pest Management (IPM) uses a rotation of different pest control methods — oils, soaps, biologicals, and beneficial insects — to prevent resistance buildup. Rotate mode of action weekly, not just product brand.
Stop all foliar sprays at least 2-3 weeks before harvest. Biological controls (predatory mites, beneficial insects) can continue through harvest since they leave no residue.