The Publications of the Pennsylvania Chestnut Tree Blight Commission, Volume 1
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acres appear ascospores become believe birds branches called cankers carried cause cells cent Chairman chestnut bark disease chestnut blight Chestnut Tree Blight chestnut trees Collins Commission Conference covered culture dead destroyed determine developed dollars effective entirely evidence experiments fact feet field forest four fungus further germination give given grafted ground grow growth hundred important inches indicate infection inoculations interested Italy killed known leaves less looking means meeting method mycelium natural noticed nuts observations owners Pennsylvania plant portion possible practical present problem produced Prof Professor pustules question removed season seems shown shows species specimens spores spread sprouts stage stumps successful suggested summer taken thing thousand timber tion wind winter wood wounds York
Page 7 - ARTICLE II This agreement shall become operative immediately as to those states executing it whenever any two or more of the states of Maine, New Hampshire, Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Delaware, Maryland, Virginia, North Carolina, South Carolina, Georgia and Florida...
Page 95 - From the latter arise the stalked asci, 365-380 x 8.5-9/4, and small slender paraphyses. The spores long remain colorless, but are finally black with small vacuoles. XLVIII. ;BARK DISEASE OF CHESTNUT Diaporthe parasitica Murrill METCALF, HAVEN.
Page 2 - This gives a perfect series of successive stages, from those which are so small that they can barely be seen with the naked eye to fully mature ones pushing out spore horns at the center of the plate.
Page 190 - ... 5. Supposing that it might be possible to eradicate all advance infections, what method is proposed that is at all feasible for combating the disease in its main line of advance? All of the foresters connected with the United States Government and the entire Army of the United States would be utterly powerless to oppose its progress.
Page 34 - The number of rejected trees, however, is no indication of the percentage of blight in any nursery, since many diseased trees are removed from the nurseries previous to the time of making shipments, and only those thought to be healthy trees are offered for inspection. Probably the greater portion of the trees went to purchasers in either Pennsylvania or New York. In case of re-distribution by other dealers, however, the final destination of the stock is not known. According to available records,...
Page 25 - KEEZELL : Mr. Chairman, on behalf of the General Assembly of Virginia, I desire to return thanks to the Executive of this great Commonwealth for the invitation to be present on this occasion, and to take part in these deliberations. So far as Virginia is concerned, we are at this time perhaps fortunate in the fact that, if we have this dread disease with us, we have so far had very little complaint of it. We are not here to give any experience of our own which may be helpful to others, but to learn...
Page 13 - Successive stages in the germination of a pycnospore nuclei then being present. The nuclei pass out into the germ tubes almost as soon as they start. The wall, also, has increased in thickness until it almost equals the diameter of the resting spore. Germination of ascospores Unlike the pycnospores, the ascospores germinate readily in pure water. They do not require a period of rest, but germinate directly after maturity if placed under proper conditions. The time required for the process to begin...
Page 214 - It was moved and seconded that the resolution be adopted. The motion was put and unanimously carried. PROFESSOR RANE: I have another resolution: "Resolved, That the thanks of this convention be, and are hereby tendered Hon. RA Pearson for his able and courteous way of handling the duties of permanent Chairman.
Page 118 - Now it seems to me that we are in a somewhat similar condition here. We have with us a pest, which is destroying our forests. It seems to me that the proper thing to do is to destroy every spore-producing specimen that we know is actively engaged in disseminating and widening the area of the disease. That would seem to be one commonsense remedy to adopt.