• Root and crown rot of strawberry

  leaf spots, such as leaf spot of strawberry and fruit rot reported mainly from Brazil. The genus is quite complex, so the taxonomy may change. Pestalotiopsis [...] is mostly found in plants that have been weakened by some form of stress, from underfertilization to water stress (either too much or too little water)

• Black sigatoka disease

  They enter the leaf through the stomata. After infection, hyphae emerge from the stomata and either develop into conidiophores with new conidia or grow [...] infected leaves or at least stack them, so the spores cannot be discharged from the lower leaves in the stack Use under-canopy (drip) irrigation to reduce

• Leaf stripe

  Infected plants may be stunted and heads may be distorted and failing to emerge from the sheath. Ear length and the number of kernels may be reduced and kernels [...] systemic infection is the only source of primary infection. The fungus spreads from the seed into the seedling. Conidia are produced on the infected leaves when

• Bacterial soft rot, bacterial stem rot

  densities. It has also been found in the gut of insects, possibly spreading from decaying vegetation to the growing crop that way. Erwinia carotovora subsp [...] cannot infect healthy green leaves, but can grow in senescent leaves and from there grow through the petiole to the main stem through the xylem vessels

• Guava

  smallish tree. The pulp varies from off-white to bright pink, and is between 4 to 12 cm in length. The taste ranges from tart to very sweet. [...] About Originally from Mexico, Central and South America, this common tropical fruit is cultivated in many tropical and subtropical regions. A vivid yellow

• Bacterial spot

  on the leaves are also round and small to start with and slightly raised from the leaf surface. They occur on the abaxial (underside of) leaf surfaces [...] leaves In field-grown tomato and pepper rotate fields to prevent infection from volunteer plants and crop debris Avoid waste piles in the vicinity of the

• Powdery mildew

  structures are produced, the haustoria, from which the fungus penetrates the plant cell and takes up nutrients from the epidermal layer of plant cells. Most [...] grows inside the leaf. Later, the conidiophores in this case also protrude from the stomata. Conidia are the main means of dispersal. They are dispersed

• Citrus mealybug

  on the aerial parts of the plant, some species extract their nourishment from roots, whilst others are gall-formers. A few species can also transmit harmful [...] inflict damage on the crop in various ways: Nymphs and females extract the sap from the plant, stunting growth and causing deformation and / or yellowing of [...] with a fine waxy material. They move very little. They can be distinguished from other mealy bugs by their possession of 18 pairs of relatively short wax

• Carrot

  colours, ranging from the regular orange to black and purple, but also red, yellow and white. The carrots which are produced nowadays derive from the wild carrot [...] indigenous to Europe and southwestern Asia. The carrot plant presumably comes from Persia and was originally produced for its seeds and leaves. Carrots can

• Cotton aphid

  including the cucumber mosaic virus. Nymphs and adults extract nutrients from the plant and disturb the balance of growth hormones. As a result, the plant’s [...] betraying their presence in the crop. The cotton aphid can be distinguished from other aphids by the colour of the two cornicles (siphunculi). These cornicles [...] cornicles are always black, whatever the body colour, which can vary widely, from light yellow to light green, or even a green-black colour . This body colour