Squash cultivation is economical during fall, early spring and single-crop seasons. The appropriate drilling periods are September during the Fall season, the end of October, the beginning of November (in a single crop season) and the middle of December during the early spring season. Squash seedlings are grown in the same manner as that of cucumber seedlings. However, as there is a considerable risk of viruses during the fall season, seedlings need to be covered with a fine muslin or a mosquito net for protection against white flies.
Squash plants should be trellised using string in order to maximize space and pruning is not necessary. However, fruit flowers which are not inseminated on the plant and thus not able to grow should be picked up and discarded (as these are the most appropriate environments for the development of grey mould and white mould, which are serious diseases found in greenhouses). Additionally, squash does not like too much heat.
On the other hand, squash grows well in low temperatures but a light frost can cause plants to die, so they must be carefully watched. Male and female flowers, which are on the different parts of the squash plant, need to be pollinated via insects, therefore, unnecessary insecticides should be avoided.
In addition, in January and February during a single crop season (when the environment is not appropriate for insemination), it is possible to promote fruit sets by using 4 CPA hormone application with the dosage of 20 PPM to newly emerged female flowers. Squash should be harvested once every 3 three weeks (at the latest) during winters and once every two weeks during other seasons. Harvesting should be accomplished via a knife and fruit should not be harmed. In addition, during seasons with high temperatures, harvesting should be done early in the morning.
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