MODELING THE EFFECTS OF WEED INTERFERENCE PERIODS AND INSECTS ON BELL PEPPERS (CAPSICUM-ANNUUM)

被引:14
作者
FRANK, JR
SCHWARTZ, PH
POTTS, WE
机构
[1] USDA ARS,BELTSVILLE AGR RES CTR,PESTICIDE ASSESS LAB,BELTSVILLE,MD 20705
[2] UNIV MARYLAND,USDA ARS,STAT CONSULTING SERV,BELTSVILLE,MD 20705
关键词
INSECT POPULATION DENSITY; WEED DENSITY; INTERFERENCE; COMPETITION; YIELD REDUCTION; CORN BORER;
D O I
10.1017/S0043174500057398
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Field experiments were conducted at Frederick, MD, in 1985 and 1986 to determine effects of weed-interference periods and insects on bell peppers. Weed-interference periods of approximately 40 and 60 d reduced both bell pepper fruit number and weight 10 and 50%, respectively. Bell pepper foliage weight was reduced 10 and 50% with approximately 20- and 50-day weed-interference periods. In 1985 and 1986, insect populations were low with an average of 10 and 3% of the pepper fruit infested, respectively. Most infested fruit was damaged by European corn borer. No significant differences in insect infestation of fruit as related to time of weed-interference periods were noted.
引用
收藏
页码:308 / 312
页数:5
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