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| Lerner, R. Purdue University. | Pepper. | http:/ / www.hort.purdue.edu/ ext/ senior/ vegetabl/ pepper1.htm |
| UC IPM. | Peppers. | http:/ / www.ipm.ucdavis.edu/ PDF/ PMG/ pmgpeppers.pdf |
| Purdue University. | Peppers. | http:/ / www.hort.purdue.edu/ rhodcv/ hort410/ pepper/ pepper.htm |
| CGIAR. | Phaseolus bean. | http:/ / www.cgiar.org/ impact/ research/ beans.html |
| CGIAR. | Pigeon pea. | http:/ / www.cgiar.org/ impact/ research/ pigeonpea.html |
| CGIAR. | Potato. | http:/ / www.cgiar.org/ impact/ research/ potato.html |
| UC IPM. | Potato. | http:/ / www.ipm.ucdavis.edu/ PDF/ PMG/ pmgpotato.pdf |
| Lerner, R. Purdue University. | Potato. | http:/ / www.hort.purdue.edu/ ext/ senior/ vegetabl/ potato1.htm |
| Purdue University. | Potatoes. | http:/ / www.hort.purdue.edu/ rhodcv/ hort410/ potat/ potat.htm |
| NYS IPM Publication. | Production guide for organic cucumber and squash. | http:/ / www.nysipm.cornell.edu/ organic_guide/ cucurbit.pdf |
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