This illness cucurbitaceous plants causes occurrence on the bottom party of leaves of a mealy taint.
Mealy dew is one of the most widespread illnesses of cucurbitaceous plants.
In areas with a hot climate signs of mealy dew usually appear before flowering of plants in the shaded places. Spots of a mealy taint at first are small - usually no more 1sm in diameter. Gradually spots join, come over to the top part of a sheet plate. At strong development of mealy dew stains cover all sheet plate. Leaves grow brown, become fragile; their edges are wrapped up and dry up. Mealy dew defeats not only the leaves, but also footstalks, and bines.
Arrangements of struggle against mealy dew:
- Observance of alternation of plants,
- Destruction of defeated after harvesting the plant rests,
- Spraying of plants at occurrence of first signs of illness by 80 %-s' moistened powder of sulphur (320 - 400g preparation on 100ΠΌ2). Spraying is repeated through 10 - 12 days. Last spraying is carrying out 20 days prior to harvesting.
