The guajava is principally cultivated in tropical and sub-tropical regions. The Brazil is one of the principal producers worldwide besides with India, Paquistan, Mexico and Venezuela. The fruit can be used in the industrialization generating many subproducts. The objective of this paper was to evaluate the efficiency of resistance inducers alone and associated with hydrothermal treatment in the control of anthracnose of guajava. The fruits that were treated with Agro-Mos® presented minor severity in comparison to the others treatments (Crop-Set, Methyl Jasmonate and Chitosan). The Agro-Mos® was selected to be used associated with the hydrothermal treatment. The temperatures treatments, 47ºC, in any time of exposure and 50ºC in the time exposure of 3 and 6 minutes differs significantly to the others, independently of the association with the inductor.

The moringa oleifera Lam. tree, a native plant species from tropical Africa, although it has been in introduced in Brazil as an ornamental tree, it can be used for industrial and medicine purposes. The work was to evaluate the physiological quality of the jug with different reservoirs and environmental conditions for a period of six months. The study was conducted in the laboratory of plant physiology in UFERSA, where the seeds were obtained, which were stored after the harvest in three different containers: plastic bag, paper bag and glass which were stored at room temperature and cold for a period of three and six months. After 12 days of sowing, evaluations were made of the speed of germination index (IVG), height and fresh and dry matter of seedlings. The experimental design was entirely randomized in a factorial 3 x 2 x 2, and studied three containers (plastic bag, paper bag and glass), two environments (temperature and cold) and two storage periods (3 and 6 months ) with four replications. The results showed that the seeds are orthodox behavior, remaining viable for six months when stored in cold and room temperature, regardless of packaging, if they are wrapped in airtight packaging.

Objective of this study quality of lettuce cultivars under saline stress, in an experiment carried out in a greenhouse. The experiment was carried out in a completely randomized design, in scheme factorial 5 x 5, with three repetitions. The treatments were five levels of salinity of irrigation water (0.5; 1.5; 2.5; 3.5 and 4.5 dS m-1) and five lettuce cultivars (Mônica SF31, Grandes Lagos 659, Veneranda, Folha Roxa Quatro Estações e Stella). The quality characteristics evaluated in the lettuce leaves were: pH, total soluble solids (TSS), titrable total acidity (TTA) and vitamin C. The analysis of the results allowed concluding that the interaction between the factors salinity and cultivars was significant. The parameters of quality were significantly affected by salinity, however, the intensity of this effect varied with the cultivar used.

The forage cactus is cultivated of extensive form as a producing species of fruits and fodder plant in many countries. The extensive culture if bases on the vegetative propagation, that is preferred, had its easiness. The propagation for seeds can come to be a useful tool for ends of genetic improvement, then, in this work forage cactus (Opuntia ficus-indica L.) seeds were submitted to different fermentation periods (0; 24; 48; 72 and 96 hours) and were dried or not, before sowing. It was evaluated the physiological quality of the seeds through the determination of the moisture content, emergence percentage and speed of seedling emergency. It was used an entirely randomized experimental design 5x2 (period of fermentation and drying). The practical one of the fermentation is efficient in the elimination of the sarcotesta in palm seeds, occurring bigger vigor in the seeds without drying and submitted the 55 hours of fermentation, as well as, the drying of the seeds, after the first periods of fermentation promotes reduction of the physiological quality, with reflected right-handers in the vigor.

This work deals with the survey of the family Boraginaceae in a lowland seasonal dry forest in the municipality of Aliança, Pernambuco, Northeast Brazil. Seven species and three genera were recorded: Cordia L., with three species (C. sellowiana Cham., C. taguahyensis Vell. and C. trichotoma (Vell.) Arráb. ex Steud.); Heliotropium L., with only one species, H. elongatum (Lehm.) I.M. Johnst. and Tournefortia L., represented by three species (T. bicolor Sw., T. gardneri A.DC. and T. rubicunda Salzm. ex A.DC.). A key to the recognition of the species, as well as descriptions and illustrations were given. Data about distribution, flowering and or fruiting of the species also are provided.

The Myracrodruon urundeuva Fr. All. specie is known like aroeira-do-sertão, it belongs to Anacardiaceae family and it can be found in the Caatinga, Cerrado and Pluvial Forest. In the present study was tested on aroeira-do-sertão the water deficit effect under greenhouse conditions in two experimental blocks: the daily irrigation and the other with water deficit. It had tested with four repetitions by treatment and in three point of stem: basal, intermediary and apical. It was registered the data about photosynthesis rate, transpiration rate, stomatal conductance, relative water content and leaf protoplasmatic tolerance. The water deficit produced increment in relative water content in the leaves at the all positions leaves through the stem and reduced the transpiration and photosynthesis rates in the plants. The apical leaves were the most sensitive to the variations of the ambient. When the aroeira-do-sertão leaves were exposured to high temperature, they presented protoplasmatic tolerance mostly in the leaves located at intermediary position in the stem whose growth is complete.

We evaluated five levels of fertilizer with ammonium sulfate in the formation of seedlings of Sunrise papaya variety of soil conditions of Mossoró-RN. The levels were evaluated: 0, 0.3, 0.6, 0.9, 1.2 grams of ammonium sulfate / litre of substrate. The experimental design was a randomized complete block, with five treatments and five repetitions, each plot consists of 15 plants useful in black disposable plastic bags, with 1.8 l of substrate by containers. Determined to two percentage germ, one to twenty days and the other trintas daysafter sowing. At 45 days after sowing, it was evaluated: height of seedlings, stem diameter, number of leaves, dry weight of the shoot, dry weight of the root system. It appeared that the ammonium sulfate caused delay in germination of seeds and seedlings affected the training of up to 45 days after sowing.

This work was accomplished with the objective of establishing a technique for the control of the oxidation, in the micropropagation in vitro of the Aloysia virgata. The experimental design utilized was the completely randomized one, with 5 treatments and 20 replications. Being the treatments: T1: control (without activated coal, sun), T2 (coal, sun), T3 (darkness, without coal), T4 (wash, control), T5 (darkness, coal). The characteristics evaluated were the oxidation levels, the percentage of contamination (fungus, bacterium) and the development (height, number of leaves). Before the presented results it can be concluded that the Aloysia virgata presents oxidation easiness. The wash in water favors the spread of fungus and bacterium. The dark ambient and the middle with activated coal were efficient in the control of the oxidation.

An experiment was carried out in the greenhouse of Plant Science Department at Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró-RN, during the period of may to june of 2007, with the evaluate the performance of rocket an green manuring. A completely randomized desings with seven treatments and four replications. The treatments consist of: (8,4; 16,8; 25,2; 33,6 e 42,0 g pot-1) plus two additional treatments (Control, 336g vaso-1 de bovine manure). The rocket cultivar grown was cv. Cultivada. The evaluated traits were: plant height, number of leaves per pot, dry mass and yield of grains. Increases in plant height, number of leaves yield mass and dry, per pot was the order of: 27,2%, 30,0%, 77,0 e 41,0%, respective. in function of amounts and scarlet starglory incorporated the soil.

It has been recorded that alternative techniques used to keep the product on and control plagues countwith a concept that is getting better day by day. It is a chilling process of grains. Therefore, a freezing unit was used in order to cool the environmental air before injecting it into the aeration system of the structure that stores the product. This is an strategy applied to reduce the grains¿ temperature to such low values that it can inhibit or even avoid the bugs¿ development, also despite the climatic conditions.. This trial was carried out in a storing Plant from a cooperative named CONTRIGUAÇU, in Palotina-PR, from November, 28th to December, 23th , 2003. Three experimental silos were used. The first one with 5,000 tons static capacity, while the others capacity was of 2,500 tons each. The concluding results showed that the layers reached a final chilling temperature in sequence, which means that, when the first one got into this point the same happened to the next ones. This result points out the existence of a chilling zone that takes part of the inner part of the grains as time passes by due to the temperature gradient among the temperature of the product, the chilling air temperature and the flow of air supplied by the equipment. The specific consume of energy was of 5.12 kW.h/ton of wheat to the first silo and of 4.48 kW.h/ton of wheat the the other ones. It was also recorded the chilling cost, which was of R$ 0.53/ton of chilled wheat.