1.Rapid defoliation ...Rapid changes in temperature, or light. Overwatering, underwatering, or exposure to drafts.
急剧
落叶...温度或光线急剧变化，浇水过多/不足，或置于通风装置前。
2.The tolerance thresholds for defoliation stages ranged between 20.6 and 34.8 DAT(d) or 61.6-75.8 days after sowing(d), and for defoliation levels ranged from 0% to 26%.
临界耐害反应的时间为20.6-34.8天(播种后61.6-75.8天),受害程度为0%-26%。
3.In order to analyse soil chemical properties under dominant trees of different defoliation percentages and contents of elements in their needles, some dominant trees of different defoliation percentages (0%~20%, 20%~40%, 40%~60% and 60%~99%) in pure stands of Pinus massoniana at Tieshanping of Chongqing were selected according to European criteria for dividing defoliation percentages.
以重庆铁山坪马尾松纯林为研究对象,采用欧洲叶量损失率的划分标准,选择叶量损失率为0～20%、20%～40%、40%～60%和60%～99%的优势木,分析其树冠下的土壤化学性质及针叶元素含量;
4.The results indicated that the compensation thresholds of Sanyou-10 for defoliation stages ranged from O to 29.5 DAT(d) or 41-70.5 days after sowing(d), and for defoliation levels ranged from 0% to 58%.
看出,汕优10号的临界补偿反应的时间为移栽后0-29.5天(播种后41-70.5天),受害程度为0%-58.0%。
5.defoliation character and the DBH,growth phase and the height character was positively correlated to each other moderately;
开花性状与树高、胸径等生长性状均呈负相关，
落叶早晚与胸径、生长期与树高均呈中度正相关；
6.small black sawfly native to Europe but established in eastern United States; larvae mine the leaves of birches causing serious defoliation.
原产于欧洲但定居在美国东部的黑色小叶蜂；幼虫在桦树的叶子上钻洞导致严重的
落叶发生。
7.Atificial defoliation by foliar spray of ABA and ethphon had a better effect on the quality of leaves and flower than by manual only.
本研究首次采用ABA、乙烯利等化学药剂对秋发牡丹植株进行脱叶,多数试验品种开花质量优于人工脱叶处理。
8.Caragana Microphylla Lam livings the defoliation bush for many years, a department prospers, ising a good tree to defends the breeze sand and keeps Water and soil to grow.
柠条(Caragana Microphylla Lam)为多年生
落叶灌木,根系发达,抗逆性强,是防风固沙、保持水土的优良树种。
9.Gradual defoliation (lower leaves yellow and fall) ... Overwatering (root damage), underwatering (not enough water to support full foliage), lack of sufficient light, or lack of fertilizer.
逐渐
落叶（下端叶子变黄脱落）...浇水过多（伤根），浇水不足（没有足够的水供所有的叶子），缺光，缺肥。
10.A decrease of source-sink ratio prompted a decrease in SOD activity,POD activity and soluble protein content in ear leaf, the reason of which maybe defoliation caused leaf hurt.
高油玉米果穗叶的 SOD、POD、PEP 羧化酶等酶活性及可溶性蛋白质含量,随源/库比的减小而降低,叶片的光合速率、光合色素含量等随源/库比的减小而显著增加,且增幅大于普通玉米。
