Will plant growth regulator produce phytotoxicity?
With the development of production, plant growth regulator has been widely used on crops and has become the important stimulation treatment in modern agriculture. Will plant growth regulator produce phytotoxcity? The answer will be certain. It is surely that plant growth regulator will produce phytotoxicity.
As plant growth regulator has many varieties and farmers do not know much about the product features, phytotoxicity situations are happened occasionally. This will often lead to crop failure.
Factors that lead to the phytotoxicity of plant growth regulators
Phytotoxicity that caused by environmental factors
Temperature change will have direct influence on the using effect of plant growth regulator products, which is also the important factor that leads to the crop phytotoxicity. Generally speaking, pesticide effect will increase with the rising of temperatures. In addition, the strong light and high humidity will also have potentiation on the pesticide effect of plant growth regulator.
Phytotoxicity that caused by agentia concentration
As plant growth regulator has high activity, the applied preparations are used little and the dilution ratio is very high, it is very easy to miscalculate water consumption, thus it will increase drug concentration and cause phytotoxcity.
Besides, crop differences will also cause phytotoxcity.
Notes of using plant growth regulator
a. Master the basic properties of plant growth regulator.
b. Clearly understand the purpose of using plant growth regulator.
c. Properly mix plant growth regulator.
d. Pay attention to the quality of plant growth regulator.
Gibberellin: it will cause phytotoxcity on grapes, in which the fruit cluster will become loose, the fruit size will become uneven, dehiscent fruit will occur, the maturation stage will be put off and fruit quality will be reduced.
2,4-D: it will cause phytotoxicity in the fruit stage of citrus fruit, which will result in fallen flowers and fruit drop when the conditions are not very serious as well as curl leaves and fallen leaves or plant death under severe conditions. It will also cause phytotoxcity on tomatoes, which will result in deformed and cracked fruit as well as shading fruit. Besides, the blade will become small and curl.
PCPA: it will cause phytotoxcity in the fruit stage of citrus fruit, in which the flower and fruit will fall down, leaves will curl inward and even cause fallen leaves. If PCPA is misused on pepper, plant will become deformed and seriously dwarf as well as there will be no blossom or fruit setting, besides, plant will wilt or even die at last.
4-Iodophennoxyacetic acid: it will cause phytotoxcity on grapes, in which the blade will thicken and become dark green, fruit cluster will become loose, fruit will become small, pericarp will become rough and the yield per plant will be obviously reduced.
NAA: it will cause phytotoxcity on apples, which will result in fallen flowers and fruit drop in less serious case and even cause leaf atrophy or fallen leaves under severe conditions. It will also cause phytotoxicity on watermelons, in which blade will reverse and plant will wilt or even die.
Isopentenyl adenine: it will cause phytotoxcity on grapes, in which the fruit quantity will increase, fruit will become small, green and hard as well as will be difficult to become ripe and will have influence the edible value.
MET: it will cause phtotoxcity on paddy, in which the plant will become seriously dwarf and clustered, the elongation stage will be put off, the heading will be inhibited and panicle enclosure will be formed. Under severe conditions, it will even reduce the output. It will also cause phytotoxcity on waxberry, which will result in serious blossom drop.