开普罗介绍说，驳船上的用水只有普通田地的十分之一，也没有农业径流，使用生物天敌防治像瓢虫这样的温室蔬菜害虫而不是化学农药。
The barge used one-tenth as much water as a comparable field farm. There was no agricultural run-off, and chemical pesticides were replaced with natural predators such as ladybirds.
每次降雨记实日期、降雨量，以便寻找每种害虫的出土成仙数目与降雨的关系，从而推断出化学防治适期。
Every time the date, rainfall, rainfall saga to look for each pests immortal and rain unearthed the number relations, so as to deduce chemical control optimum stage.
化学防治——利用化学杀虫剂来防治害虫。
Chemical control - using chemical pesticides to control pests.
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