EVALUATION OF Psidium guajava LEAVES AND ACETIC ACID AS NATURAL HERBICIDES FOR CONTROLLING SOME WEEDS OF Capsicum annuum CROP
EVALUATION OF Psidium guajava LEAVES AND ACETIC ACID AS NATURAL HERBICIDES FOR CONTROLLING SOME WEEDS OF Capsicum annuum CROP
Mona Adel El-Wakeel1*, Salah El-Din Abd El-Ghany Ahmed, Sanaa Abd El Rahman Mohamed
and Nadia Khalil Messiha
ABSTRACT
Allelopathy and natural products are safe non-chemical modern techniques that are
applied as alternative to synthetic herbicides for controlling weeds. So, two pot experiments
were conducted to evaluate the allelopathic effect of Psidium guajava leaf powder (PLP) and
Acetic acid 5% as a natural products on the growth and yield of Capsicum annuum plants
and both associated weeds: Phalaris minor (grassy weed) and Malva parviflora (broad-leaf
weed). PLP was mixed with in the soil surface at successive rates (15, 30, 45 and 60 g pot-
1). In the corresponding treatments PLP at the same sequenced rates were mixed with the
soil then sprayed with acetic acid 5% immediately. Moreover, sole spraying of acetic acid
5% treatment was sprayed on the soil surface. All treatments were applied before
transplanting directly. Results revealed that the maximum inhibition of both weeds in both
seasons (2018 and 2019) was recorded by PLP at 60g + Acetic acid 5% as compared to
unweeded control. Concerning C. annuum growth parameters and yield traits, sole
application of PLP at successive rates is more effective than PLP at the same successive
rates with acetic acid 5%. So, it was observed that PLP at 60g pot-1 and 45 g pot-1
significantly developed most of growth parameters and yield traits of C. annuum than the
healthy plants in both seasons. On the contrary, acetic acid treatment alone recorded the
lowest value of all growth parameters and yield traits of C. annuum plants.
To share on other social networks, click on any share button. What are these?
March 2020
Vol. 26, Iss. 1
