. The culture and diseases of the sweet pea. Sweet peas; Sweet peas. 156 DISEASES OF THE SWEET PEA. FIG. 32. SHOWING HOW APHIDS FEED AND THE NECESSITY OF A CONTACT SPRAY TO KEEP IT IN CHECK. (COURTESY OF THE KENTUCKY TOBACCO PRODUCTS CO.) do any males occur. This form of repro- duction without the intervention of the male is known as parthenogenesis. On the approach of cool fall weather a generation. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly rese
. The culture and diseases of the sweet pea. Sweet peas; Sweet peas. 156 DISEASES OF THE SWEET PEA. FIG. 32. SHOWING HOW APHIDS FEED AND THE NECESSITY OF A CONTACT SPRAY TO KEEP IT IN CHECK. (COURTESY OF THE KENTUCKY TOBACCO PRODUCTS CO.) do any males occur. This form of repro- duction without the intervention of the male is known as parthenogenesis. On the approach of cool fall weather a generation. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Taubenhaus, Jacob Joseph, 1885- [from old catalog]. New York, E. P. Dutton & company
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