Potatoes are susceptible to a variety of pests and diseases that can severely impact yield and quality. At POMAIS Agriculture, we offer effective solutions for managing these challenges with a wide range of pesticide products. Additionally, we provide customized pesticide formulations by combining multiple active ingredients to address specific potato crop needs, ensuring optimal protection and a healthy harvest.

Common Potato Diseases

1. Late Blight (Phytophthora infestans)

Вплив:
Late blight is one of the most devastating diseases for potato crops, causing rapid decay of the leaves, stems, and tubers. It can spread quickly, especially under cool, wet conditions, and lead to substantial crop loss.

Симптоми:

  • Dark, water-soaked lesions on leaves and stems, often surrounded by a yellow halo.
  • White, cotton-like growth under wet conditions, particularly on the undersides of leaves.
  • Tuber rot, which leads to the production of dark, sunken lesions on the tubers.

Методи контролю:

  • Критичний контрольний період: From the early vegetative stage to the tuber formation period.
  • Рекомендовані пестициди: Фунгіциди, такі як Манкозеб, Фунгіциди на основі міді та Металаксил are effective in controlling late blight.

2. Early Blight (Alternaria solani)

Вплив:
Early blight is a fungal disease that affects both leaves and stems, leading to reduced photosynthesis and poor tuber development. In severe cases, early blight can cause premature defoliation and yield loss.

Симптоми:

  • Concentric, dark brown or black spots with yellow halos on older leaves.
  • Lesions that enlarge, causing tissue necrosis.
  • Defoliation leading to poor growth and decreased yield.

Методи контролю:

  • Критичний контрольний період: During early to mid-growing season.
  • Рекомендовані пестициди: Фунгіциди, такі як Азоксистробін or Хлороталоніл are effective in controlling early blight.
Фітофтороз картоплі
Рання фітофтороз картоплі
Манкозеб
Манкозеб

Манкозеб

Metalaxyl 35 WP 3
Metalaxyl 35% WP
Металаксил М 124 гЛ Азоксистробін 322 гЛ SE
Металаксил-М 124 г/л + Азоксистробін 322 г/л SE
Metalaxyl M 37.5 gL Chlorothalonil 500 gL SC
Metalaxyl-M 37.5 gL + Chlorothalonil 500 gL SC

Main Potato Diseases and Management Recommendations

Bacterial ring rot is a seed-borne vascular disease that causes wilt and internal tuber decay. Infected plants show yellowing and wilting of lower leaves, with creamy, cheese-like rot forming a distinct ring in the tuber’s vascular tissue. When pressure is applied, creamy ooze may appear from the cut surface.
When it appears: During mid to late growth, particularly if contaminated seed or equipment is used. It can persist for years on unclean tools and containers.
Управління: There is no curative treatment. Prevent introduction by planting certified disease-free seed, disinfecting equipment, and destroying infected lots. Copper bactericides can slightly suppress surface bacteria but are not systemic. Rotation and hygiene are critical.

These bacteria attack the stems and seed pieces, producing a soft, foul-smelling decay. Blackleg symptoms include black, slimy stems, wilted leaves, and poor stands from decayed seed pieces.
When it appears: Early season under cool, wet soil followed by warm weather. Poor aeration and mechanical injury accelerate infection.
Управління: Use well-suberized seed, avoid planting in water-logged soils, and ensure seed cutters and planters are disinfected daily. Warm seed before cutting and apply fungicidal seed treatments що містить флудіоксоніл or тіабендазол to reduce secondary rots. Keep storage temperatures below 10 °C and maintain airflow.

A soil-borne fungus that forms minute black dots (microsclerotia) on tubers and stems. Infected plants exhibit premature vine death and reduced tuber size.
When it appears: Common late in the season, especially following stress such as drought or heavy early blight infection.
Управління: Employ 3–4-year rotations, avoid continuous potato cropping, and improve soil drainage. Fungicides containing азоксистробін, боскалідабо penthiopyrad applied to soil or foliage can reduce incidence.

“Calico” describes a mosaic pattern of light and dark green patches on leaves, caused by mixed infections (often PVY and Alfalfa mosaic virus). It reduces photosynthetic efficiency and tuber yield.
When it appears: Anytime during growth but most visible from mid-season. Spread mainly by aphids.
Управління: Plant certified seed; remove infected plants; control aphid vectors with імідаклоприд, ацетаміпридабо флупірадифурон; eliminate weedy virus reservoirs.

Causes a dry, gray-black rot at the stem base, with tiny black sclerotia that resemble charcoal dust. It develops in hot, dry soils when plants are water-stressed.
When it appears: Late season, especially in sandy fields with high temperature and low humidity.
Управління: Maintain irrigation, increase organic matter, and rotate with non-host crops (cereals). No reliable fungicides exist, but азоксистробін or flutolanil can suppress outbreaks.

Produces corky or raised lesions on tuber surfaces, making them unsightly though not decayed. Infection occurs as new tubers form.
When it appears: During tuber initiation in warm, dry soils with high pH (>5.2).
Управління: Підтримувати стабільна вологість ґрунту for 2–4 weeks after tuber set, avoid fresh manure, and apply acidifying fertilizers. No chemical control is fully effective; focus on irrigation and crop rotation.

The disease causes brown concentric rings inside the tuber and mild leaf chlorosis. It’s transmitted by stubby-root nematodes.
When it appears: In sandy soils with nematode populations, visible at harvest.
Управління: Control nematode vectors using fluopyram, фостіазатабо оксаміл, and rotate away from host crops. Clean seed and nematode testing are recommended.

Results in mottled, distorted leaves and yield reduction. Aphids transmit CMV non-persistently.
When it appears: Warm seasons with high aphid movement.
Управління: Use virus-free seed, remove alternate hosts, and suppress aphids with systemic insecticides such as імідаклоприд or тіаметоксам. Mineral oil sprays can help reduce transmission.

Symptoms include leaf curling, thickened brittle foliage, and purple discoloration. Plants are severely stunted and often produce no tubers.
When it appears: When beet leafhopper populations migrate into potato fields, usually in dry, warm weather.
Управління: Застосовувати лямбда-цигалотрин or дельтаметрин early in migration periods, manage weeds that harbor vectors, and use tolerant cultivars where available.

Caused by wall-less bacteria spread by leafhoppers. Symptoms are yellow or purple leaves, multiple small shoots (“witches’ broom”), and deformed tubers.
When it appears: Warm periods favoring leafhopper activity.
Управління: Suppress leafhoppers, eliminate weeds, and remove infected plants. There is no chemical cure once infected.

Produces characteristic “target-spot” concentric rings on lower leaves, leading to premature defoliation.
When it appears: From canopy development through maturity, especially under dry stress followed by humidity.
Управління: Скористайтеся кнопкою protectant fungicides (chlorothalonil, mancozeb) starting early, rotating with QoI (azoxystrobin), SDHI (boscalid, fluopyram), or DMI (difenoconazole). Maintain nitrogen balance and remove old crop debris.

Causes shriveled seed pieces and internal dry cavities in stored tubers, with brownish, dry rot and concentric rings.
When it appears: At cutting and during storage.
Управління: Cut and plant promptly; disinfect knives; treat seed with флудіоксоніл or тіабендазол; store at 3–4 °C with 90% humidity and good airflow.

Infected plants show yellowing of lower leaves and one-sided wilt. Cutting stems reveals vascular browning.
When it appears: Mid to late season in continuous potato fields.
Управління: Rotate with non-hosts for 4 years, maintain balanced irrigation, and control nematodes that worsen symptoms. No chemical cure is available.

The most devastating potato disease. Causes water-soaked lesions on leaves, stems, and tubers, with white sporulation under humid conditions. Tubers rot in field and storage.
When it appears: Cool (10–20 °C), wet weather with long leaf wetness periods.
Управління: Start fungicide protection before forecasted infection periods. Rotate оксатіапіпролін, mandipropamid, cyazofamid, cymoxanil + chlorothalonilабо Флуазинам. Eliminate cull piles and volunteer potatoes to reduce inoculum.

Leaves roll upward and become brittle; tubers may develop internal net necrosis. Transmitted by aphids.
When it appears: Mid to late season after aphid buildup.
Управління: Certified seed, aphid control (флупірадифурон, ацетаміприд), and removal of infected plants.

Show mottled, rugose, or streaked leaves, stunting, and reduced tuber set. Spread by aphids and infected seed.
When it appears: Throughout the season.
Управління: Clean seed, vector control, removal of volunteer plants, and virus-resistant varieties.

Tuber flesh turns pink after exposure to air, then brown or black. Often causes post-harvest storage leaks.
When it appears: Waterlogged soils near harvest and warm storage.
Управління: Improve drainage, avoid over-irrigation, and apply фосфориста кислота or оксатіапіпролін before harvest. Store dry, cool, and well-ventilated tubers.

Creates raised pustules on tubers and root galling. The pathogen also transmits potato mop-top virus.
When it appears: In cool, wet soils during tuber initiation.
Управління: Long rotations (5+ years), improved drainage, and partial protection from Флуазинам seed treatments. Avoid infested fields.

Causes watery, soft rot starting at wounds, often with a musty odor.
When it appears: During warm, wet harvest and early storage.
Управління: Harvest only under dry conditions, cool quickly to below 10 °C, and avoid bruising. Mefenoxam/metalaxyl can protect wounded tubers when applied at harvest.

Forms white cottony mycelium and small mustard-seed sclerotia at the stem base, leading to wilting.
When it appears: Hot, humid weather, especially in southern regions.
Управління: Deep plowing, crop rotation, and flutolanil or азоксистробін soil treatment reduce inoculum.

Causes shiny silver patches on stored tubers; severe infections lead to shriveling and weight loss.
When it appears: Late season and during long storage at high humidity.
Управління: Застосовувати тіабендазол, флудіоксонілабо імазаліл seed and post-harvest treatments; reduce humidity and improve ventilation in storage.

Results in uneven emergence, brown lesions on stolons, and black sclerotia (“dirt that won’t wash off”) on tubers.
When it appears: Cool, wet soil conditions after planting.
Управління: Treat seed or soil with flutolanil, pencycuron, sedaxaneабо penflufen. Avoid cold planting and improve drainage.

Causes one-sided wilt and yellowing, with vascular browning in stems. Yield losses increase when combined with nematodes.
When it appears: Mid to late season in old potato soils.
Управління: 3–4 year rotations, nematode control, and resistant cultivars. Soil fumigation may help where permitted.

Produces soft, water-soaked lesions on stems and foliage, with fluffy white mycelium and black sclerotia.
When it appears: Cool, humid conditions around flowering and vine closure.
Управління: Increase canopy ventilation, control irrigation, and apply боскалід, Флуазинам, penthiopyradабо іпродіон at early bloom. Remove plant debris after harvest.

Colorado Potato Beetle Leptinotarsa decemlineata
Aphids Macrosiphum euphorbiae
Імідаклоприд5WP
Імідаклоприд
Тіаметоксам25SC
Тіаметоксам 25% SC
Ацетаміприд20SP 2
Ацетаміприд 20% SP

Common Potato Pests

1. Colorado Potato Beetle (Leptinotarsa decemlineata)

Вплив:
The Colorado potato beetle is a major pest that attacks both the foliage and stems of potato plants. Its feeding results in defoliation and can significantly reduce crop yield. The beetles also carry viruses that can further affect plant health.

Симптоми:

  • Defoliation of leaves, resulting in reduced photosynthesis.
  • Presence of yellowish larvae and adult beetles on the undersides of leaves.
  • Stunted growth and poor tuber development due to the loss of foliage.

Методи контролю:

  • Критичний контрольний період: From the early vegetative stage through to tuber maturity.
  • Рекомендовані пестициди: Інсектициди, такі як Імідаклоприд, Тіаметоксам та Піретроїди are effective in controlling the Colorado potato beetle.

2. Aphids (Macrosiphum euphorbiae)

Вплив:
Aphids are sap-feeding insects that cause direct damage by sucking nutrients from the plants, which weakens the plants and results in yellowing and stunted growth. They are also vectors for several viral diseases.

Симптоми:

  • Yellowing and wilting of leaves.
  • The presence of aphids on the undersides of leaves.
  • The secretion of honeydew, which attracts sooty mold.

Методи контролю:

  • Критичний контрольний період: From seedling stage to tuber maturity.
  • Рекомендовані пестициди: Системні інсектициди, такі як Імідаклоприд та Ацетаміпрід can control aphid populations effectively.

Key Insect Pests of Potato and Recommended Control

Опис: Small soft-bodied insects that suck sap from leaves and stems, causing leaf curling, yellowing, and transmitting viral diseases like PVY and PLRV.
Поява: Usually appear from early vegetative to tuber bulking stages, especially under warm, dry conditions.
Recommended Insecticides:

  • Імідаклоприд (systemic, long-lasting protection)

  • Ацетаміпрід or Тіаметоксам (contact and systemic)

  • Піметрозин (anti-feeding effect, ideal for resistance management)

Опис: Small, wedge-shaped insects that feed on potato leaves and transmit Фіолетовий верх та Айстри жовті phytoplasma.
Поява: Active during warm seasons; adults migrate into potato fields from nearby weeds.
Recommended Insecticides:

  • Лямбда-цигалотрин or Дельтаметрин (quick knockdown)

  • Імідаклоприд (systemic protection in early season)

  • Thiamethoxam + Lambda-cyhalothrin mixtures for extended control

Опис: Caterpillars that hide in soil during the day and feed at night, cutting young stems near the soil surface.
Поява: Most damaging during early crop establishment and cool, moist spring conditions.
Recommended Insecticides:

  • Хлорпірифос (soil treatment before planting)

  • Лямбда-цигалотрин or Циперметрин (foliar application at night)

  • Індоксакарб or Емамектину бензоат (targeting larvae)

Опис: Tiny, jumping beetles that chew small round holes (“shot holes”) in leaves, reducing photosynthesis and vigor.
Поява: Appear soon after emergence and persist through early growth.
Recommended Insecticides:

  • Імідаклоприд or Клотіанідин (seed or soil treatment)

  • Дельтаметрин (contact spray for adults)

  • Спіносад (for resistance rotation, lower residue profile)

Опис: Small sap-sucking insect that transmits хвороба зебри спричинений Candidatus Liberibacter solanacearum.
Поява: From mid-season onward in warm, dry weather; populations increase rapidly if not managed early.
Recommended Insecticides:

  • Абамектин or спіротетрамат (target nymphs and adults)

  • Імідаклоприд or Flupyradifurone (systemic, long-lasting control)

  • Біфентрін (fast knockdown for heavy infestations)

Опис: Moth larvae bore into tubers and leaves, creating galleries and increasing storage losses.
Поява: Common in late season and during warm, dry storage conditions.
Recommended Insecticides:

  • Хлорантраніліпрол (effective on larvae)

  • Емамектину бензоат or Луфенурон (egg and larval control)

  • Bacillus thuringiensis (Bt) for eco-friendly programs

Опис: Tiny white insects found on undersides of leaves; cause chlorosis, sooty mold, and transmit viruses.
Поява: Thrive under high temperature and dense canopy, mostly during mid to late season.
Recommended Insecticides:

  • Пірипроксифен or Бупрофезин (juvenile hormone inhibitors)

  • Імідаклоприд or Тіаметоксам (systemic protection)

  • Спіромесифен or Flupyradifurone (for resistance management)

Опис: Hard-bodied larvae of click beetles that feed on potato tubers, creating tunnels and reducing market quality.
Поява: Persistent in fields with previous grass cover or poor rotation; damage occurs from planting to tuber bulking.
Recommended Insecticides:

  • Фіпроніл or Хлорпірифос (soil treatment before planting)

  • Тефлутрин (granule formulation at seeding)

  • Імідаклоприд (seed treatment for light infestations)

Impact of Potato Pests and Diseases

The presence of pests and diseases in potato crops can lead to severe consequences:

  • Втрата врожайності: Diseases like late blight and pests like the Colorado potato beetle can result in a significant reduction in yield.
  • Зниження якості: Fungal diseases like early blight can damage the appearance and quality of the potatoes, leading to a decrease in marketability.
  • Передача хвороби: Pests like aphids can spread viral diseases, which can cause widespread crop damage.
  • Неврожай: In severe cases, unchecked pest and disease infestations can result in total crop loss.

Potato Pest and Disease Management Solutions

Контрольні індикатори:

  • Раннє виявлення: Monitoring for signs of pests and diseases at every growth stage is critical to prevent widespread damage.
  • Профілактичні методи лікування: Applying fungicides and insecticides before the onset of severe infestations can help maintain crop health.

Критичні контрольні періоди:

  • Розсада до ранніх вегетативних стадій: Control of pests such as aphids and the prevention of early blight is crucial during this stage.
  • Tuber Formation to Maturation: Protecting plants from late blight and the Colorado potato beetle is essential during the later stages of growth.

Рекомендовані пестициди:

  • Фунгіциди: Манкозеб, Металаксил, Азоксистробін та Хлороталоніл are effective in controlling late and early blight.
  • Інсектициди: Імідаклоприд, Тіаметоксам, Ацетаміпрід та Піретроїди are recommended for controlling potato pests such as the Colorado potato beetle and aphids.

Про нас

POMAIS прагне довгострокових партнерських відносин з імпортерами, дистриб'юторами та власниками брендів агрохімікатів.

Незалежно від того, чи ви розширюєтеся на нові ринки, чи розробляєте власну лінійку продуктів, наша команда готова запропонувати гнучкі та масштабовані рішення для вашого бізнесу.

Ми маємо добру репутацію серед клієнтів, які переважно походять з Росії, Близького Сходу, Африки та Південної Америки. Молода команда з продажу з ентузіазмом тепло вітає вас і допомагає вам зайняти ринок завдяки гарному сервісу та професійним навичкам.

Ми співпрацюємо з імпортерами та дистриб'юторами з усього світу. Наша фабрика, з якою ми співпрацюємо, пройшла акредитацію ISO9001:2000. Підтримка реєстраційних документів та постачання сертифікатів ICAMA. Тестування SGS для всієї продукції.

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