Treesearch

Greenwood apical cuttings from 1- to 4-month-old cherrybark oak (Quercus falcata var. pagodaefolia Ell.) seedlings have been rooted in 4 weeks under mist, after treatment with indolebutyric acid. The technique is suitable for establishing small clones.

I would like to start by giving a complete prescription for planting any hardwood species by a cheap and simple method that will insure excellent survival and good growth. Unfortunately, this is impossible, for we at the Southern Hardwoods Laboratory are still several years away from such prescriptions with nearly all of our important hardwoods. With most species, however, we have had enough experience to gain some knowledge of what we can do and a lot of information about what we can't do. We can, for instance, give you a satisfactory method for stratifying sweetgum seed, and we can also...

Black tupelo is divided into two distinct and conunonly recognized varieties, typical black tupelo (N . sylvatica var. sylvatica) and swamp tupelo (N. sylvatica var. biflora (Walt.) Sarg.) .

In southern nurseries, hardwood seedlings often grow so large that they are difficult to lift and plant. In a study at the Southern Hardwoods Laboratory, maleic hydrazide (MH) was tested as a means of halting height growth when seedlings reach suitable size.

Cadam (Anthocaephalus cadamba Miq.) grows very rapidly on a wide variety of sited in Puerto Rico. Tree form is excellent, seed is produced in abundance every year by mature trees, planting is easy and cheap, and relatively little care is required after planting. No important attacks of insects of disease have occurred on trees grown in Puerto Rico for 35 years. The moderate density (0.45 based on green volume and oven-dry weight) and very low volumentric shrinkage (10 percent) from green to oven-dry condition, together with excellent machining characteristics, indicate many possible uses...

This bulletin describes three hackberry galls, the insects which make them, and 19 of their natural enemies in the Cayuga Valley near Ithaca, N.Y. Two galls were caused by psyllids and the third by a cecidomyiid. The taxonomy, biology, morphology, and distribution of the species are discussed. Fourteen natural enemies attacked the psyllid gall makers, and five fed on the cecidomyiid gall maker. However, no cecidomyiid parasites were found in psyllid galls, nor were natural enemies of psyllids located in cecidomyiid galls. Whereas most natural enemies attacked only gall makers, three were...

Foresters have known for a long time that seed-eating rodents, birds, and insects must be circumvented before direct seeding can be successful. Advances have been made in reducing losses in the direct seeding of pine by the use of chemical repellents, and in several areas of the South recommended concentrations have been satisfactory. Direct seeding is now on an operational basis.

Shortleaf pine occupies millions of acres of commercial forest land in the Southeastern United States and is one of the preferred pine species throughout much of its range. Natural regeneration of this species after harvest, however, is a major problem for forest managers. Adequate seed production is the first requirement of successful natural regeneration, and annual records are needed to provide information on the frequency and adequacy of seed crops--seed crops which, it must be remembered, take about 26 months to develop.

Baldcypress (Taxodium distichum var. distichum), pondcypress (T. distichum var. nutans), and blackgum(Nyssa sylvatica) can be successfullyplanted as bare-rooted, l- 0 stock on upland soils in northeast Florida according to a study on the Olustee Experimental Forest.This research was conducted with the cooperation of the Florida Board of Forestry. After three growing seasons survival was excellent, although height growth has been disappointingly slow.

The total amount of forest land in Louisiana is virtually the same today as it was a decade ago. But its distribution has changed noticeably. In the Delta, for example, forest acreage is still declining; between 1954 and 1964, it dropped some 7 percent, thus closely paralleling trends in the Delta sections of neighboring Arkansas and Mississippi. Outside the Delta, forest acreage has increased some 3 percent since 1954. Modest losses in the southeast and southwest regions have been overshadowed by woodland expansion in the northwest.