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1 僵叶苗 1.1 病症:主要出现在幼苗三叶期之前,秧苗株形细小,叶片淡绿,黑根多,移栽后,除新叶呈绿色,外叶发黄发僵,抗逆性差,易出现死叶、死苗。 1.2 防治办法:(1)苗期以腐熟的有机肥为主,不用或少用尿素作底肥,磷肥必须经过沤制后施用,土壤保持适度的温度,要壮苗移栽。(2)对已经出现的僵苗,要及时加强水浇和玉米的叶面喷施,用高美施、太阳花等叶面肥。
1 stiff leaf seedlings 1.1 disease: mainly in the seedling three-leaf stage, seedling plant shape small, green leaves, black root and more, after transplanting, in addition to the new leaves were green, the outer leaves yellow stiff, poor resistance, Easy to appear dead leaves, dead seedlings. 1.2 Control Measures: (1) seedling to decomposed organic fertilizer-based, no or less urea as base fertilizer, phosphate fertilizer must be applied after the system, the soil to maintain a modest temperature, strong seedling transplanting. (2) on the emergence of stiff seedlings, we must promptly strengthen the watering and corn foliar spray, with high Meishan, sunflowers and other foliar fertilizer.