Leite Germano L D, Picanço Marcelo, Zanuncio José C, Marquini Flávio
Departamento de Agropecuária, Núcleo de Ciências Agrárias/Universidade Federal de Minas Gerais, Caixa Postal, 135, 39404-006-Montes Claros, State of Minas Gerais, Brazil.
Exp Appl Acarol. 2003;31(3-4):243-52. doi: 10.1023/b:appa.0000010379.05878.2c.
The objective of this study was to determine effects of total rainfall, mean temperature, predators, height of canopy, levels of nitrogen and potassium in leaves, and the density of leaf trichomes on the attack intensity of Tetranychus evansi and T. urticae (Acari: Tetranychidae) and Aculops lycopersici (Acari: Eriophyidae) in five plantations of the eggplant Solanum melongena var. 'Natu Nobilis' in two regions of Brazil. Higher numbers of individuals of A. lycopersici, T. evansi and T. urticae/cm2 were observed on eggplants in the Municipality of Guidoval than in Viçosa which might be explained by the fact that Guidoval showed hotter and more rainy weather. A. lycopersici was positively correlated with mean temperature (r=0.54, P=0.03), and T. evansi was positively correlated with total rainfall (r=0.54; P=0.04), while for T. urticae the correlation with total rainfall was almost significant (r=0.47, P=0.055). No significant effects were found (P>0.05) of natural enemies, levels of N and K and leaf trichome density on population densities of mites. A. lycopersici showed higher density on the apical leaves while nymphs and adults of T. evansi and eggs of T. urticae had higher numbers on leaves of the apical and medium parts of eggplants than on the lower leaves. Nymphs and adults of T. urticae showed higher attack intensity on leaves from the medium and lower thirds of the plants.
本研究的目的是确定总降雨量、平均温度、捕食者、冠层高度、叶片中氮和钾的含量以及叶毛密度对巴西两个地区五个茄子品种‘Natu Nobilis’种植园中番茄斑潜蝇、二斑叶螨（蜱螨目：叶螨科）和番茄刺皮瘿螨（蜱螨目：瘿螨科）攻击强度的影响。在吉多瓦尔市的茄子上观察到的番茄刺皮瘿螨、番茄斑潜蝇和二斑叶螨的个体数量/平方厘米高于维索萨，这可能是因为吉多瓦尔天气更炎热多雨。番茄刺皮瘿螨与平均温度呈正相关（r = 0.54，P = 0.03），番茄斑潜蝇与总降雨量呈正相关（r = 0.54；P = 0.04），而二斑叶螨与总降雨量的相关性几乎显著（r = 0.47，P = 0.055）。未发现天敌、氮和钾含量以及叶毛密度对螨类种群密度有显著影响（P>0.05）。番茄刺皮瘿螨在顶叶上密度较高，而番茄斑潜蝇的若虫和成虫以及二斑叶螨的卵在茄子顶部和中部叶片上的数量高于下部叶片。二斑叶螨的若虫和成虫对植株中下部三分之一的叶片表现出较高的攻击强度。
