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在新栽的桃树〔Pruns Porsice (L)Batsch〕地里巴哈雀稗(Paspalunnotatum Flugge Cu Paraguayan-22)会严重阻碍树的生长发育。无论是补充肥料还是灌溉,在每株树下安装两个每小时3.8升的喷头都不能消除阻碍。喷头由自动张力计来控制以使在0.5m深的土层保持3千帕的压力。栽植前每公顷土地用100升的二澳乙烷熏蒸处理可增加树的生长,但不能增加成活。每年春天和秋天给树施杀线虫剂,用量为每公顷11千克,但是不能确定它对树的成活,生长和线虫群体的效果。巴哈雀稗在树下有控制Mdoidogyne spp群体的倾向。Meloidgyne spp是土壤中唯一的一种在150cm~3土壤中群体平均数大于65的线虫。在有巴哈雀稗和用除草剂处理的裸地中生长的桃树,叶片中元素含量不同。尽管土壤PH为6.5的土壤含Ca量是适当的,但叶片的含Ca量仍较低。在有巴哈雀稗的地里,树的生长被阻碍了,但在其它处理中没有这个情况,这就说明在新栽的桃树园中不能种植巴哈雀稗。有少数群落的线虫寄生在巴哈雀稗上,这说明巴哈雀稗有潜力用于桃树线虫的生物防治。使用化学药剂的名称是:ethy1-3-methy-4-(m-ethylthio) pheny(1-methylethyl)pbosphor-amidate(fenamiphos)〔乙基—3—甲基—4—(甲硫基)苯基(1—甲基乙基)磷硫胺脂(杀虫剂)〕。
Paspalunnotatum Flugge Cu Paraguayan-22 can severely hinder tree growth in newly planted Pruns Porsice (L) Batsch. Whether replenishing fertilizer or irrigating, installing two 3.8-liter nozzles per tree does not eliminate the hurdle. The sprayer was controlled by an automatic strain gauge to maintain a pressure of 3 kPa at a depth of 0.5 m. Fumigation with 100 liters of dioxane per hectare prior to planting can increase the tree’s growth but does not increase survival. The tree nematicide is applied every spring and autumn in an amount of 11 kg per hectare, but its effect on tree survival, growth and nematode population can not be determined. Paspalum has a tendency to control the Mdoidogyne spp population under the tree. Meloidgyne spp is the only nematode in soil that has a population average of> 65 in 150 cm ~ 3 soil. In peaches with barnyardgrass and herbicide-treated bare land, the leaf content varies. Although the Ca content of soil with a soil pH of 6.5 is appropriate, the Ca content of the leaves is still low. The growth of the tree was hampered in the presence of barnyardgrass, but this was not the case in other treatments, indicating that barnyard grass can not be planted in newly planted peach trees. A small number of community nematodes are parasitized on barnyardgrass, indicating that barnyardgrass has potential for biological control of peach nematode. The names of chemicals used are: ethy1-3-methy-4- (m-ethylthio) pheny (1-methylethyl) pbosphor- amidate (fenamiphos) (1-methylethyl) phosphothiamine lipid (insecticide)].