Efeito do tipo de perfilho, densidade de plantio e adubação NK mineral sobre a produção e resistência da cebolinha ao ataque da mosca minadora

Abstract

Chives (Allium schoenoprasum L.) is an important horticultural crop in the suburban area of large cities in the Northeast of Brazil. One of the pest problem of this crop is the leaf miner fly (Liriomyza sativae L), an insect that causes injury to the leaves of this crop, reducing its yield potential. Since there is no rational control of this insect, this study was carried out with the objective of establishing practices that could control the leaf miner fly as well as increasing the yield of the crop through the use of nitrogen and potassium. The results showed that chives growers of the suburban area of Fortaleza may increase their yield by cutting the roots of vigorous or two median-vigorous tillers and planting them in hill made in fertilized soil and spaced 20 x 20 cm. The fertilization with nitrogen and potassium of soil where chives were grown did not affect their tillers potential, however, nitrogen or potassium or a combination of them produced more fresh weight, about 10 ton/ha, 45 days after planting. The fertilization of chives with urea and potassium chloride increased linearly the production of leaves with terminal burns, but did not affect the behaviour of the miner leaf fly.